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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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I am talking about an OBI style punch press, if I am not mistaken,
with a BIG flywheel. It is powered with a 1/2 HP single phase motor. I would say it weighs 200-300 pounds. This is from a big pile of really old iron (not yet quite ready for a museum, but almost) from an estate of a deceased 90 yr old guy. I offered them $100 for it, after two weeks no one is biting (they wanted to sell the whole shed of that stuff for 2k, which was crazy). So they are now agreeing to sell to me. My question is, is $100 a reasonable price. The punch works. i |
#2
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If it comes with useable dies, or at least the tooling is easy to make
for it, I think $100. is a steal, considering what even a small Ironworker goes for. JR Dweller in te cellar Ignoramus9581 wrote: I am talking about an OBI style punch press, if I am not mistaken, with a BIG flywheel. It is powered with a 1/2 HP single phase motor. I would say it weighs 200-300 pounds. This is from a big pile of really old iron (not yet quite ready for a museum, but almost) from an estate of a deceased 90 yr old guy. I offered them $100 for it, after two weeks no one is biting (they wanted to sell the whole shed of that stuff for 2k, which was crazy). So they are now agreeing to sell to me. My question is, is $100 a reasonable price. The punch works. i -- -------------------------------------------------------------- Home Page: http://www.seanet.com/~jasonrnorth If you're not the lead dog, the view never changes Doubt yourself, and the real world will eat you alive The world doesn't revolve around you, it revolves around me No skeletons in the closet; just decomposing corpses -------------------------------------------------------------- Dependence is Vulnerability: -------------------------------------------------------------- "Open the Pod Bay Doors please, Hal" "I'm sorry, Dave, I'm afraid I can't do that.." |
#3
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Ignoramus9581 wrote:
I am talking about an OBI style punch press, if I am not mistaken, with a BIG flywheel. It is powered with a 1/2 HP single phase motor. I would say it weighs 200-300 pounds. This is from a big pile of really old iron (not yet quite ready for a museum, but almost) from an estate of a deceased 90 yr old guy. I offered them $100 for it, after two weeks no one is biting (they wanted to sell the whole shed of that stuff for 2k, which was crazy). So they are now agreeing to sell to me. My question is, is $100 a reasonable price. The punch works. i Does it have tooling i.e. useful punches? If not do you have the means to produce your own? Either way, at $100 it sounds like you could sell it at the scrap iron place for nearly as much if you decide you don't want it. I don't think many home shops have punch presses, they're a little specialized for home use. |
#4
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On Sun, 23 Sep 2007 17:37:23 -0700, JR North wrote:
If it comes with useable dies, or at least the tooling is easy to make for it, I think $100. is a steal, considering what even a small Ironworker goes for. JR Dweller in te cellar OK, thanks. I let them know that I am interested. This is about 67-70 year ld son of a 93 year machinist. i Ignoramus9581 wrote: I am talking about an OBI style punch press, if I am not mistaken, with a BIG flywheel. It is powered with a 1/2 HP single phase motor. I would say it weighs 200-300 pounds. This is from a big pile of really old iron (not yet quite ready for a museum, but almost) from an estate of a deceased 90 yr old guy. I offered them $100 for it, after two weeks no one is biting (they wanted to sell the whole shed of that stuff for 2k, which was crazy). So they are now agreeing to sell to me. My question is, is $100 a reasonable price. The punch works. i |
#5
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A friend keeps reminding Me: "The punch press is ALWAYS trying to get you".
Pete Stanaitis ----------------- Ignoramus9581 wrote: I am talking about an OBI style punch press, if I am not mistaken, with a BIG flywheel. It is powered with a 1/2 HP single phase motor. I would say it weighs 200-300 pounds. This is from a big pile of really old iron (not yet quite ready for a museum, but almost) from an estate of a deceased 90 yr old guy. I offered them $100 for it, after two weeks no one is biting (they wanted to sell the whole shed of that stuff for 2k, which was crazy). So they are now agreeing to sell to me. My question is, is $100 a reasonable price. The punch works. i |
#6
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Ignoramus9581 wrote:
I am talking about an OBI style punch press, if I am not mistaken, with a BIG flywheel. It is powered with a 1/2 HP single phase motor. I would say it weighs 200-300 pounds. This is from a big pile of really old iron (not yet quite ready for a museum, but almost) from an estate of a deceased 90 yr old guy. I offered them $100 for it, after two weeks no one is biting (they wanted to sell the whole shed of that stuff for 2k, which was crazy). So they are now agreeing to sell to me. My question is, is $100 a reasonable price. The punch works. i the way I would see it is this. If you want to make things, wether for a hobby or your livelihood, the 1st thing you need is space. the 2nd thing you need are tools. Now there are lots of different types of punch presses, those for working primarily smiths work, and those for say blanking out parts for anything you might want from say fishing reels to car to model parts. then the next thing is whats the rated tonnage? ie, what work will it do? you say a big fly wheel How big? dia? thickness? etc. Whatsthe throat depth? and whats the hole size in the bed plate? That determines howbig a piece youe blanked out or punched will fall through into a bucket or tray. underneath. There should also be some kind of clutch mechanism that causes the fly wheel to engage with the crank? either continiously or single shot. Any chance of a picture? What ever it is its a steal @$100.00. Whats also more interesting what else is there? Let me tell you about my own steal in 1987. Im a silversmith not a jeweller, making bigger stuff. I had a call from a one armed fellow smith, to say, another s/smih was retiring some 5o miles from me, all the modern stuff was gone, and all that was left was all his old rubbish.(his words) My friend thought I was the sort of idiot who would be interested in that. I went to see this old chap, and what he had was as follows. It was a complete drop stampers workshop dating from 1851, nothing from that period was missing. the drop stamp, the fly presses, the dies the bolsters the catalogues the price lists all black and dirty. Some 10 tons of it it eventually worked out. It had come originally from the Birmingham jewelly quarter. no one else wanted it down here . It had been his family's livelyhood from his great grandfathers time and he didnt have a son to follow on. I Called him a few days later to say Id have it all, with the promise id never scrap it but use it, . BUT all I could offer was scrap price plus 10% and Id collect. He called back a few days later to say yes and the rest is history. This complete museum collection !! was the key to a complete range of new products for me.. I design ,make, and market my own productsretail. Dont sell to the trade. By 1989 I had made the drop hammer fully transportable so I could mint a plaque or medal for an event AT the event. The second time I took it out for real, I took $6000.00 over a 5 day period off the hammer. I was even invited to come from the UK to Chicago to the 100th centenery of the Americaln numismatic assn. the drop stamp stands 10 ft high, weighs some 2 tons and gives over 100 tons dynamic energy. Medium Hammer is 275lbs, andcanfall some 5 ft. Nice tool!!. Never had guards or nothin, the old smith taught me how to use it and how not to get ones hands or antyhing else in the way. the sad bit was he never got to see what I made from his rubbish. He died 6 months after I bought it off him. See your press as a step up in the do it yourself game. As others have said, there will probably be lots of tooling about, but youll need help to identify what your looking for. If yoyur not going to use it, make sure it goes to someone who can. It aught not to be scrapped. Modern tooling can be very expensive if you dont know how to make your own. Lets have pictures ond keep us all informed how you get on. |
#7
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On Sun, 23 Sep 2007 19:29:19 -0500, Ignoramus9581
wrote: I am talking about an OBI style punch press, if I am not mistaken, with a BIG flywheel. It is powered with a 1/2 HP single phase motor. I would say it weighs 200-300 pounds. This is from a big pile of really old iron (not yet quite ready for a museum, but almost) from an estate of a deceased 90 yr old guy. I offered them $100 for it, after two weeks no one is biting (they wanted to sell the whole shed of that stuff for 2k, which was crazy). So they are now agreeing to sell to me. My question is, is $100 a reasonable price. The punch works. i Yes. Watch your fingers and make sure the dog clutch is well greased Gunner, who services such. |
#8
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On Sun, 23 Sep 2007 19:29:19 -0500, Ignoramus9581
wrote: I am talking about an OBI style punch press, if I am not mistaken, with a BIG flywheel. It is powered with a 1/2 HP single phase motor. I would say it weighs 200-300 pounds. This is from a big pile of really old iron (not yet quite ready for a museum, but almost) from an estate of a deceased 90 yr old guy. I offered them $100 for it, after two weeks no one is biting (they wanted to sell the whole shed of that stuff for 2k, which was crazy). So they are now agreeing to sell to me. My question is, is $100 a reasonable price. The punch works. i It's probably worth a hundred bux...........BUT.......... That said, old machines can have dangerous operating features. Faulty wiring, worn out switches or electrical contacts, mechanical problems that are not completely obvious. This is a small press so ram stroke will be very quick.....TOO QUICK for you to get your body parts out of the way if it double trips. NEVER stick any hand, finger, or anything that would really hurt in the die area when the flywheel is in motion. I.e., motion of any kind AT ALL. Even if you have stopped the motor and the flywheel is spinning down. Wait until it has completely stopped. The recommendation is that you then BLOCK the ram before putting a hand in the die area, if required (say to remove a mis-hit or tighten a screw or something), once the machine has come to a full rest. A section of sturdy I-beam may be ok for this but check into it further. Danly may make something even better. http://www.danly.com/ Feed parts with an appropriate set of tongs or something.......NO FINGERS OR HANDS....EVER!! That press probably cycles in les then .5 seconds, so if it trips when you have a hand in there, goodbye hand. Really!! Be very very careful with that thing. Dave |
#9
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![]() "spaco" wrote in message .. . A friend keeps reminding Me: "The punch press is ALWAYS trying to get you". Pete Stanaitis Phantom digits are a real problem !!!!! Best Regards Tom. |
#10
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On Mon, 24 Sep 2007 06:06:28 GMT, dav1936531
wrote: That press probably cycles in les then .5 seconds, so if it trips when you have a hand in there, goodbye hand. Really!! Be very very careful with that thing. Dave It probably cycles in about .2 second. The little ones arent fast...they are sudden. Gunner |
#11
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spaco wrote:
A friend keeps reminding Me: "The punch press is ALWAYS trying to get you". One got the hand of the daughter of a friend of mine in Ohio. She lost most of her hand when she reached in at the wrong time. -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida |
#12
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On Mon, 24 Sep 2007 07:25:26 -0400, Michael A. Terrell wrote:
spaco wrote: A friend keeps reminding Me: "The punch press is ALWAYS trying to get you". One got the hand of the daughter of a friend of mine in Ohio. She lost most of her hand when she reached in at the wrong time. Mike, how sad. Did they recover the hand in any way? i |
#13
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Ignoramus3778 wrote:
On Mon, 24 Sep 2007 07:25:26 -0400, Michael A. Terrell wrote: spaco wrote: A friend keeps reminding Me: "The punch press is ALWAYS trying to get you". One got the hand of the daughter of a friend of mine in Ohio. She lost most of her hand when she reached in at the wrong time. Mike, how sad. Did they recover the hand in any way? i Recover what Iggy, a blob of goo to keep in a jar of formaldehyde??? That's the difference between a punch press accident and say a table saw accident, the lack of anything to recover and reattach. Gotta be *REALLY* careful... |
#14
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On Mon, 24 Sep 2007 13:13:27 GMT, Pete C. wrote:
Ignoramus3778 wrote: On Mon, 24 Sep 2007 07:25:26 -0400, Michael A. Terrell wrote: spaco wrote: A friend keeps reminding Me: "The punch press is ALWAYS trying to get you". One got the hand of the daughter of a friend of mine in Ohio. She lost most of her hand when she reached in at the wrong time. Mike, how sad. Did they recover the hand in any way? i Recover what Iggy, a blob of goo to keep in a jar of formaldehyde??? That's the difference between a punch press accident and say a table saw accident, the lack of anything to recover and reattach. Gotta be *REALLY* careful... Well, maybe the punch punched a small hole etc i |
#15
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Ignoramus3778 wrote:
On Mon, 24 Sep 2007 13:13:27 GMT, Pete C. wrote: Ignoramus3778 wrote: On Mon, 24 Sep 2007 07:25:26 -0400, Michael A. Terrell wrote: spaco wrote: A friend keeps reminding Me: "The punch press is ALWAYS trying to get you". One got the hand of the daughter of a friend of mine in Ohio. She lost most of her hand when she reached in at the wrong time. Mike, how sad. Did they recover the hand in any way? i Recover what Iggy, a blob of goo to keep in a jar of formaldehyde??? That's the difference between a punch press accident and say a table saw accident, the lack of anything to recover and reattach. Gotta be *REALLY* careful... Well, maybe the punch punched a small hole etc i Don't the punches normally have a fairly large clamp / stripper section around them? If it's just a straight punch the surrounding material will get deformed and stuck around the punch. |
#16
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After a Computer crash and the demise of civilization, it was learned
Gunner Asch wrote on Mon, 24 Sep 2007 03:51:02 -0700 in rec.crafts.metalworking : On Mon, 24 Sep 2007 06:06:28 GMT, dav1936531 wrote: That press probably cycles in les then .5 seconds, so if it trips when you have a hand in there, goodbye hand. Really!! Be very very careful with that thing. Dave It probably cycles in about .2 second. The little ones arent fast...they are sudden. Use two buttons to cycle the punch. That way you have a better than even chance of having your fingers out of the way when it cycles. -- pyotr filipivich "Quemadmoeum gladuis neminem occidit, occidentis telum est. " Lucius Annaeus Seneca, circa 45 AD (A sword is never a killer, it is a tool in the killer's hands.) |
#17
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On Sep 23, 5:29 pm, Ignoramus9581
wrote: I am talking about an OBI style punch press, if I am not mistaken, with a BIG flywheel. It is powered with a 1/2 HP single phase motor. I would say it weighs 200-300 pounds. This is from a big pile of really old iron (not yet quite ready for a museum, but almost) from an estate of a deceased 90 yr old guy. I offered them $100 for it, after two weeks no one is biting (they wanted to sell the whole shed of that stuff for 2k, which was crazy). So they are now agreeing to sell to me. My question is, is $100 a reasonable price. The punch works. i As long as the frame, crankshaft, bearing caps, etc. are in good operating condition this is a great deal. I and some friends once had access to a small machine like this and we thought we might make our fortunes by knocking out spoons (fishing lures), until we started to price dies. ![]() Follow the strictist safety rules, as others have mentioned. dennis in nca |
#18
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On Sep 24, 6:25 am, "Michael A. Terrell"
wrote: spaco wrote: A friend keeps reminding Me: "The punch press is ALWAYS trying to get you". One got the hand of the daughter of a friend of mine in Ohio. She lost most of her hand when she reached in at the wrong time. -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida Actually this brings up an important point. Even if you are super careful...how about the next guy who uses it and is injured? Will you be paying his bills? A punch press is a financial liability...especially an old one. When you own it, you are on the hook when something goes wrong. Unless you have a definite need for it, I would pass. TMT |
#19
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On Mon, 24 Sep 2007 06:44:24 -0700, pyotr filipivich
wrote: After a Computer crash and the demise of civilization, it was learned Gunner Asch wrote on Mon, 24 Sep 2007 03:51:02 -0700 in rec.crafts.metalworking : On Mon, 24 Sep 2007 06:06:28 GMT, dav1936531 wrote: That press probably cycles in les then .5 seconds, so if it trips when you have a hand in there, goodbye hand. Really!! Be very very careful with that thing. Dave It probably cycles in about .2 second. The little ones arent fast...they are sudden. Use two buttons to cycle the punch. That way you have a better than even chance of having your fingers out of the way when it cycles. Most of the little ones have a foot pedals with mechanical linkages. Foot pedals and music do NOT go well together. Gunner |
#20
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Too_Many_Tools wrote:
On Sep 24, 6:25 am, "Michael A. Terrell" wrote: spaco wrote: A friend keeps reminding Me: "The punch press is ALWAYS trying to get you". One got the hand of the daughter of a friend of mine in Ohio. She lost most of her hand when she reached in at the wrong time. -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida Actually this brings up an important point. Even if you are super careful...how about the next guy who uses it and is injured? Will you be paying his bills? A punch press is a financial liability...especially an old one. When you own it, you are on the hook when something goes wrong. Unless you have a definite need for it, I would pass. TMT I don't recall my liability insurance company asking if I had a punch press in my home shop, nor do I see such an exclusion in the policy... |
#21
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Gunner Asch wrote:
On Mon, 24 Sep 2007 06:44:24 -0700, pyotr filipivich wrote: After a Computer crash and the demise of civilization, it was learned Gunner Asch wrote on Mon, 24 Sep 2007 03:51:02 -0700 in rec.crafts.metalworking : On Mon, 24 Sep 2007 06:06:28 GMT, dav1936531 wrote: That press probably cycles in les then .5 seconds, so if it trips when you have a hand in there, goodbye hand. Really!! Be very very careful with that thing. Dave It probably cycles in about .2 second. The little ones arent fast...they are sudden. Use two buttons to cycle the punch. That way you have a better than even chance of having your fingers out of the way when it cycles. Most of the little ones have a foot pedals with mechanical linkages. Foot pedals and music do NOT go well together. Gunner Ooh, foot pedals... to insure you can get both of your hands in the machine and then cycle it... how evil... |
#22
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Pete C. wrote:
Ignoramus3778 wrote: On Mon, 24 Sep 2007 13:13:27 GMT, Pete C. wrote: Ignoramus3778 wrote: On Mon, 24 Sep 2007 07:25:26 -0400, Michael A. Terrell wrote: spaco wrote: A friend keeps reminding Me: "The punch press is ALWAYS trying to get you". One got the hand of the daughter of a friend of mine in Ohio. She lost most of her hand when she reached in at the wrong time. Mike, how sad. Did they recover the hand in any way? i Recover what Iggy, a blob of goo to keep in a jar of formaldehyde??? That's the difference between a punch press accident and say a table saw accident, the lack of anything to recover and reattach. Gotta be *REALLY* careful... Well, maybe the punch punched a small hole etc i Don't the punches normally have a fairly large clamp / stripper section around them? If it's just a straight punch the surrounding material will get deformed and stuck around the punch. Not if you set it up properly. Some have a stripper arm, some dont. In the absence of pictures were all guessing what this press is all about. I have a 25ton power press and this uses a 3hp motor. so a 1/2 hp motor will drive a 4 ton press, or thereabouts. Now theres a lot to learn all about press work. apart from the safety angle. you need to know what the punch clearances are for various thicknesses of material, also what depth through the die the punch goes. this has to be adjustable to suit the material. also theres a nack in using these machines by hand. were not talking about automated strip fed power presses with sequential tool and die sets. this sounds like a simple foot pedal operated one shot press for small components. You need to be taught how to use it so that your safe and can produce consistent blanks from sheet thats hand fed. This latter task needs planning so that each blank is close to the previous one so you can strip the sheet off the punch with a small twisting action. I do it all the time with the 6 ton press I have as well. the same principles apply if your blanking with a fly press. you only need guards if you employ someone. officially. I wouldn let any one else use it anyway. hope this helps you decide wether you want to learn some new skills. .. |
#23
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On Mon, 24 Sep 2007 06:44:24 -0700, pyotr filipivich
wrote: After a Computer crash and the demise of civilization, it was learned Gunner Asch wrote on Mon, 24 Sep 2007 03:51:02 -0700 in rec.crafts.metalworking : On Mon, 24 Sep 2007 06:06:28 GMT, dav1936531 wrote: That press probably cycles in les then .5 seconds, so if it trips when you have a hand in there, goodbye hand. Really!! Be very very careful with that thing. Dave It probably cycles in about .2 second. The little ones arent fast...they are sudden. Use two buttons to cycle the punch. That way you have a better than even chance of having your fingers out of the way when it cycles. But you STILL shut off the motor and/or block the punch with a big chunk of timber or steel when putting your hands in there. And use tongs or a stick to change the blanks with the power on. Old control systems often have failure modes that can cause it to cycle. You have to treat it as if it's out to get you. Even with a proper two-hand-no-block safety system on the cycle trigger switch you still don't let ANYONE operate it who does not respect the safety concerns. Or you'll get your ass sued off when an employee loses a body part. And the best idiots get help in breaking all the rules - they'll stick a hand in to hold the die in position (with a stick that in retrospect was about an inch too short) and have someone else two-hand cycle the punch... This is why you don't see many antique machines in modern production shops - safety issues that can't easily be retrofitted away. This is why I was so **** poor slow doing old fashioned Letterpress Printing (where you change the paper by hand) - I wouldn't try feeding the press fast enough to let it go into continuous feed unless I had the speed turned way down. And having the speed fast, tripping it by pedal once the paper was in position, and waiting after the cycle to make sure it didn't double-trip was no better. But I can still count to ten without blank spots. This is good. ;-) -- Bruce -- |
#24
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On Mon, 24 Sep 2007 03:51:02 -0700, Gunner Asch
wrote: On Mon, 24 Sep 2007 06:06:28 GMT, dav1936531 wrote: That press probably cycles in les then .5 seconds, so if it trips when you have a hand in there, goodbye hand. Really!! Be very very careful with that thing. Dave It probably cycles in about .2 second. The little ones arent fast...they are sudden. Gunner Yeah......."sudden" is an even better discription of little presses. That speed makes them far more dangerous then larger presses with longer cycle times.....which are still plenty dangerous if you don't follow safety protocols at ALL TIMES. Dave |
#25
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On Mon, 24 Sep 2007 17:39:57 GMT, "Pete C."
wrote: Gunner Asch wrote: On Mon, 24 Sep 2007 06:44:24 -0700, pyotr filipivich wrote: After a Computer crash and the demise of civilization, it was learned Gunner Asch wrote on Mon, 24 Sep 2007 03:51:02 -0700 in rec.crafts.metalworking : On Mon, 24 Sep 2007 06:06:28 GMT, dav1936531 wrote: That press probably cycles in les then .5 seconds, so if it trips when you have a hand in there, goodbye hand. Really!! Be very very careful with that thing. Dave It probably cycles in about .2 second. The little ones arent fast...they are sudden. Use two buttons to cycle the punch. That way you have a better than even chance of having your fingers out of the way when it cycles. Most of the little ones have a foot pedals with mechanical linkages. Foot pedals and music do NOT go well together. Gunner Ooh, foot pedals... to insure you can get both of your hands in the machine and then cycle it... how evil... Ayup. Lots of old punch operators called Lefty... |
#26
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Interesting discussion.
So, a good start would be a safety conversion from pedal to two switch operation, right? i still ambidextrous |
#27
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Ignoramus3778 wrote:
Interesting discussion. So, a good start would be a safety conversion from pedal to two switch operation, right? i still ambidextrous Two key switches 10' apart ala missile silo... |
#28
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On Sep 23, 8:29 pm, Ignoramus9581
wrote: I am talking about an OBI style punch press, if I am not mistaken, with a BIG flywheel. It is powered with a 1/2 HP single phase motor. I would say it weighs 200-300 pounds. This is from a big pile of really old iron (not yet quite ready for a museum, but almost) from an estate of a deceased 90 yr old guy. I offered them $100 for it, after two weeks no one is biting (they wanted to sell the whole shed of that stuff for 2k, which was crazy). So they are now agreeing to sell to me. My question is, is $100 a reasonable price. The punch works. If it helps to hear another voice say the same thing.. Find a certified, experienced and trustworthy tool and die maker to SHOW you how to operate your press correctly. After four thousand hours working on mechanical and hydraulic presses up to 2500 tons capacity, I was still very careful EVERY time. With mechanical presses (yours), you get to jam it precisely ONCE. When you do, something WILL break. People have been crushed by massive flywheels and gears coming off the presses due to a smash. Don't be fooled by the size of your machine. Find the formulas and calculate the amount of energy that flywheel has stored. Your mushy body doesn't stand a chance. That press will be *the* most dangerous tool in your shop. Regards, Robin |
#29
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Thanks to all. I brought the press home (rather, it is in my
trailer). Some notes: - It was VERY painful to maneuver my trailer in almost total darkness (no streetlights on that street), into a narrow driveway at the dead end of a street. The flashing light that I made for it, saved my ass: http://igor.chudov.com/projects/Home...Backing-Guide/ - The press was made by BLISS (no idea if it is good or bad). - I want to clean it up and get into nice shape, maybe even change a motor since I have a few spare motors. - I want to try it out carefully (ie, keep hands in my pocket while operating the foot pedal). - I have not yet decided whether the press is worth the space that it would take. My guess is that the answer is no. - To my uneducated mind, it seems that most proper uses of this press revolve around leather, not metal. i |
#30
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Robin S. wrote:
On Sep 23, 8:29 pm, Ignoramus9581 wrote: I am talking about an OBI style punch press, if I am not mistaken, with a BIG flywheel. It is powered with a 1/2 HP single phase motor. I would say it weighs 200-300 pounds. This is from a big pile of really old iron (not yet quite ready for a museum, but almost) from an estate of a deceased 90 yr old guy. I offered them $100 for it, after two weeks no one is biting (they wanted to sell the whole shed of that stuff for 2k, which was crazy). So they are now agreeing to sell to me. My question is, is $100 a reasonable price. The punch works. If it helps to hear another voice say the same thing.. Find a certified, experienced and trustworthy tool and die maker to SHOW you how to operate your press correctly. After four thousand hours working on mechanical and hydraulic presses up to 2500 tons capacity, I was still very careful EVERY time. With mechanical presses (yours), you get to jam it precisely ONCE. When you do, something WILL break. People have been crushed by massive flywheels and gears coming off the presses due to a smash. Don't be fooled by the size of your machine. Find the formulas and calculate the amount of energy that flywheel has stored. Your mushy body doesn't stand a chance. That press will be *the* most dangerous tool in your shop. Regards, Robin I fully agree. these presses are like any moving machinery, they will catch you out if you dont respect them. I guess im probably the only self emplyed drop stamp owner operator on this newsgroup, and I made very sure the previous owner of of my 1880 drop hammer /mint showed me how to use it properly. After I had rebuilt it asa fully working machine, the first thing I did was to put some 4 by 2 in where the die went and drop it to splinters till I had the hang of the lift/ drop/ rebound/park, control. If you use them as they are meant to be , you should be allright. |
#31
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On Mon, 24 Sep 2007 17:21:26 -0500, Ignoramus3778
wrote: Interesting discussion. So, a good start would be a safety conversion from pedal to two switch operation, right? i still ambidextrous Yes. its simple enough to cobble up a pair of NO momentary switches and use them to fire off a solenoid to trip the dog clutch. And far far safer. Though to be fair...I work on these a couple times a month and only see a few women (usual operators) with missing fingers or divits. But then..they often quit right after an accident. An interesting side note about presses. Lots of the old mechanical dog clutch ones still in operation and being bought and sold. However..and this may give you something to consider...most are bought and sold for cash, with no receipts/bills of sale tendered. And often the buyer has to give the seller a signed statement that the press is being bought as Scrap and will not be operated, only destroyed. In our litigious society...this is about the only way one can protect himself when selling a mechanical press. And Ive brokered 15-20 in the last 5 yrs. ALL..ALL...ALL being cash sales between good sized companies. Ive been told that 60% of the price of any new press, is insurance. Few machine tool dealers will admit to being able to supply a punch press. However they nearly all know someone who has one..... Gunner |
#32
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On Mon, 24 Sep 2007 19:08:26 -0700, "Robin S."
wrote: On Sep 23, 8:29 pm, Ignoramus9581 wrote: I am talking about an OBI style punch press, if I am not mistaken, with a BIG flywheel. It is powered with a 1/2 HP single phase motor. I would say it weighs 200-300 pounds. This is from a big pile of really old iron (not yet quite ready for a museum, but almost) from an estate of a deceased 90 yr old guy. I offered them $100 for it, after two weeks no one is biting (they wanted to sell the whole shed of that stuff for 2k, which was crazy). So they are now agreeing to sell to me. My question is, is $100 a reasonable price. The punch works. If it helps to hear another voice say the same thing.. Find a certified, experienced and trustworthy tool and die maker to SHOW you how to operate your press correctly. After four thousand hours working on mechanical and hydraulic presses up to 2500 tons capacity, I was still very careful EVERY time. With mechanical presses (yours), you get to jam it precisely ONCE. When you do, something WILL break. People have been crushed by massive flywheels and gears coming off the presses due to a smash. Don't be fooled by the size of your machine. Find the formulas and calculate the amount of energy that flywheel has stored. Your mushy body doesn't stand a chance. That press will be *the* most dangerous tool in your shop. Regards, Robin Good advise. Gunner |
#33
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On Mon, 24 Sep 2007 21:20:01 -0500, Ignoramus3778
wrote: - The press was made by BLISS (no idea if it is good or bad). Very old..very good. Gunner |
#34
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Ignoramus3778 wrote:
On Mon, 24 Sep 2007 07:25:26 -0400, Michael A. Terrell wrote: spaco wrote: A friend keeps reminding Me: "The punch press is ALWAYS trying to get you". One got the hand of the daughter of a friend of mine in Ohio. She lost most of her hand when she reached in at the wrong time. Mike, how sad. Did they recover the hand in any way? Only part of the palm could be saved I can't remember if she lost the thumb, but she did lose all four fingers.. She was 16, and in high school when it happened. Somehow, she was able to adapt, and laugh at what happened. Her parents owned a business that made replacement parts for antique cars. I don't remember if it was the 10 ton, or one of their larger presses they used to make fenders, it was about 25 years ago. I do remember that she had a wicked sense of humor, and loved to make people laugh. ![]() -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida |
#35
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On Mon, 24 Sep 2007 20:04:57 -0700, Gunner Asch wrote:
On Mon, 24 Sep 2007 17:21:26 -0500, Ignoramus3778 wrote: Interesting discussion. So, a good start would be a safety conversion from pedal to two switch operation, right? i still ambidextrous Yes. its simple enough to cobble up a pair of NO momentary switches and use them to fire off a solenoid to trip the dog clutch. And far far safer. Though to be fair...I work on these a couple times a month and only see a few women (usual operators) with missing fingers or divits. But then..they often quit right after an accident. An interesting side note about presses. Lots of the old mechanical dog clutch ones still in operation and being bought and sold. However..and this may give you something to consider...most are bought and sold for cash, with no receipts/bills of sale tendered. And often the buyer has to give the seller a signed statement that the press is being bought as Scrap and will not be operated, only destroyed. In our litigious society...this is about the only way one can protect himself when selling a mechanical press. And Ive brokered 15-20 in the last 5 yrs. ALL..ALL...ALL being cash sales between good sized companies. Ive been told that 60% of the price of any new press, is insurance. Few machine tool dealers will admit to being able to supply a punch press. However they nearly all know someone who has one..... OK, good point on insurance and cash/disclaimer on sales. I finally got it into my garage and will clean it up. It seems to work fine. Weighs about 300+ lbs. i |
#36
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On Mon, 24 Sep 2007 20:04:57 -0700, Gunner Asch
wrote: Yes. its simple enough to cobble up a pair of NO momentary switches and use them to fire off a solenoid to trip the dog clutch. And far far safer. ======= Until it doubles because of a stuck/sticky clutch. The only truly safe setup is pull-backs or a sliding door or sweep. These just sprain or break the arm/hand rather than cut it off. Unka' George [George McDuffee] ============ Merchants have no country. The mere spot they stand on does not constitute so strong an attachment as that from which they draw their gains. Thomas Jefferson (1743-1826), U.S. president. Letter, 17 March 1814. |
#37
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On Mon, 24 Sep 2007 17:21:26 -0500, Ignoramus3778
wrote: Interesting discussion. So, a good start would be a safety conversion from pedal to two switch operation, right? Oh, absolutely. And you want to put guards around anything that moves just so someone doesn't get 'brain fade' and put their hand in where it shouldn't go - only takes a fraction of a second of inattention to make a batch of hamburger out of a hand. The term you want is a "Two hand no tie-down" safety circuit, where you have to push two buttons roughly at the same time. And the press won't reset if one or both buttons is held down, as would happen if someone deliberately jammed one of the buttons to get out of pressing it each time. Clippard makes one that's 100% pneumatic (logic control valves, like air relays) if the machine is all air powered and air operated, and you don't want to run electricity to it just for the controls. -- Bruce -- |
#38
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![]() "Gunner Asch" wrote in message ... On Mon, 24 Sep 2007 21:20:01 -0500, Ignoramus3778 wrote: - The press was made by BLISS (no idea if it is good or bad). Very old..very good. Gunner The good old american iron is an excellent candidate to build DIY iron worker. I did a conversion of an old bliss to operate with a hydraylic cylinder for a client that manufactured wroth iron fences. He was able to punch 1" square holes in 1/4" plate and channel iron in 5 seconds. If you need a short throat iron worker you can build one at reasonable cost using a scrap yard punch press and some hydraulics. Best Regards Tom. |
#39
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On Mon, 24 Sep 2007 23:28:32 -0500, Ignoramus3778
wrote: On Mon, 24 Sep 2007 20:04:57 -0700, Gunner Asch wrote: On Mon, 24 Sep 2007 17:21:26 -0500, Ignoramus3778 wrote: Interesting discussion. So, a good start would be a safety conversion from pedal to two switch operation, right? i still ambidextrous Yes. its simple enough to cobble up a pair of NO momentary switches and use them to fire off a solenoid to trip the dog clutch. And far far safer. Though to be fair...I work on these a couple times a month and only see a few women (usual operators) with missing fingers or divits. But then..they often quit right after an accident. An interesting side note about presses. Lots of the old mechanical dog clutch ones still in operation and being bought and sold. However..and this may give you something to consider...most are bought and sold for cash, with no receipts/bills of sale tendered. And often the buyer has to give the seller a signed statement that the press is being bought as Scrap and will not be operated, only destroyed. In our litigious society...this is about the only way one can protect himself when selling a mechanical press. And Ive brokered 15-20 in the last 5 yrs. ALL..ALL...ALL being cash sales between good sized companies. Ive been told that 60% of the price of any new press, is insurance. Few machine tool dealers will admit to being able to supply a punch press. However they nearly all know someone who has one..... OK, good point on insurance and cash/disclaimer on sales. I finally got it into my garage and will clean it up. It seems to work fine. Weighs about 300+ lbs. i Hell..thats a tiny one. Gunner |
#40
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On Mon, 24 Sep 2007 23:34:46 -0500, F. George McDuffee
wrote: ======= Until it doubles because of a stuck/sticky clutch. The only truly safe setup is pull-backs or a sliding door or sweep. These just sprain or break the arm/hand rather than cut it off. Unka' George [George McDuffee] Even the pull backs are not perfect. Back in the 60's I was working as a tool & die maker for a large maker of automotive gauges (S-W) in Chicago. An operator lost both hands due to mis-applied pull backs. The die he was running was in a long stroke press, and the bushings in the punch holder completely left the leader pins in the die shoe, when the press was at the top of it's stroke. Well the cables on the pull backs somehow got wrapped around the bushings. And when the press was tripped, the operators hands were pulled into the die. The die came to the tool room for clean up. No volunteers, the foreman did the clean up. John Normile |
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