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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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big abrasive saw, initial report
I've been posting a barrage of questions related to a 16" abrasive saw which I
believe is the same saw as an Everett 16" dry cutoff saw made today. I bought this saw yesterday from a guy who bought a warehouse and contents at a bankruptcy sale. (Today I found out the guy who went bankrupt was once a friend of mine, sad story.) It wasn't running, and was priced accordingly - pretty cheap. I hauled it home today, put it on the bench and started monkeying with it. The first thing I did was rewire the motor from 440 to 220, put a plug on it and fire it up. My phase converter starts it fine, don't know if it will run it full blast or not until I get a little farther. (The motor is 7.5hp 3 phase and I'm running it off a phase converter with a 7.5hp idler.) The motor is incredibly noisy. The bearings are probably shot, most likely 6205 and 6206. I may replace them but it would be a lot of work. As far as I can tell the spindle bearings aren't very noisy, but until I rebuild the motor or replace it with a quieter one, I won't be able to tell. The vise is both cool and unfortunate. It's a nice cam-action vise which works quickly. The bad thing about it is it only works at 90° and 45°, can't cut any angle I want. I may think of a way to cobble but for now I'll go with it. The machine has been hit sometime in the past. The stand (a sheet metal affair) is pretty bent, and the fiberglass belt guard is broken, and the motor's electrical connection box, an aluminum cast box, is broken out around the power wiring, which comes in via flex conduit. The switch is old but works fine. There was a simply incredible amount of grinding swarf caught up under this machine. Big chunks that must have weighed 25 pounds were falling off. What's left seems to be very tightly bound. I may take a crack at trying to fix the fiberglass belt guard, because this machine, already dangerous, would be about five times as dangerous with 3 V-belts running fast (the motor runs at 3450 rpm) driven by a 7.5hp motor, were the belts to be exposed. The main wheel guard is a solid aluminum casting, in fine shape. The main castings of the saw are heavy aluminum, and they are in good shape. The upper casting, the one that swings up and down, had been fitted with a long handle but the handle broke out and is gone. This is the biggest issue with this saw. I'll probably just weld a 3/4" pipe socket at a 25° angle to a little steel plate and bolt it over the broken out hole in the casting, and use a piece of 3/4" pipe for a handle. No showstoppers so far. This saw certainly *looks* like it could cut steel very seriously indeed. GWE |
#2
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big abrasive saw, initial report
On Thu, 01 Dec 2005 22:21:18 -0800, Grant Erwin
wrote: I've been posting a barrage of questions related to a 16" abrasive saw which I believe is the same saw as an Everett 16" dry cutoff saw made today. I bought this saw yesterday from a guy who bought a warehouse and contents at a bankruptcy sale. (Today I found out the guy who went bankrupt was once a friend of mine, sad story.) It wasn't running, and was priced accordingly - pretty cheap. I hauled it home today, put it on the bench and started monkeying with it. The first thing I did was rewire the motor from 440 to 220, put a plug on it and fire it up. My phase converter starts it fine, don't know if it will run it full blast or not until I get a little farther. (The motor is 7.5hp 3 phase and I'm running it off a phase converter with a 7.5hp idler.) The motor is incredibly noisy. The bearings are probably shot, most likely 6205 and 6206. I may replace them but it would be a lot of work. As far as I can tell the spindle bearings aren't very noisy, but until I rebuild the motor or replace it with a quieter one, I won't be able to tell. Sounds familiar in several ways. The 2HP TEFC motor I had on mine for years had bad bearings. I put up with it for a long time meaning to replace them when I got a chance but never got around to it. When it finally came time to do something about it I changed to the 3hp 3 phase that's on there now. I wanted more power (if I'd had a 5hp on hand I would of put that on there) and had real 3 phase power by that time as well. The vise is both cool and unfortunate. It's a nice cam-action vise which works quickly. The bad thing about it is it only works at 90° and 45°, can't cut any angle I want. I may think of a way to cobble but for now I'll go with it. That's one of the problems with the commercial saws like that. They're great for straight cuts. There are some out there that are miter saws which is what I want. They don't clamp as fast but there's just like a wood miter saw when it comes to versatility. If I ever manage to gather up enough round tiuts I'm going to overhaul mine into a miter saw. The machine has been hit sometime in the past. The stand (a sheet metal affair) is pretty bent, and the fiberglass belt guard is broken, and the motor's electrical connection box, an aluminum cast box, is broken out around the power wiring, which comes in via flex conduit. The switch is old but works fine. Ouch. Well sounds like there's some work to do. There was a simply incredible amount of grinding swarf caught up under this machine. Big chunks that must have weighed 25 pounds were falling off. What's left seems to be very tightly bound. Yep. I know that the commercial one in the local welding shop (which BTW I believe is a 20" saw) is totally enclosed and very few sparks make it out of the cabinet. I can't imagine what it looks like under there. Mines not so well guarded and tends to throw the sparks straight back from the saw. At least those that don't hit the pipe I've got across the hinge stand. There tends to be a rather large pile welded to that pipe most of the time. Currently I've got a piece of sheet metal behind mine that I curved so that the majority of the sparks are gently directed to the ground. It's worked fairly well so far. One thing you don't want to do it have a flat plate for the sparks to hit. That just bounces them back at you. I may take a crack at trying to fix the fiberglass belt guard, because this machine, already dangerous, would be about five times as dangerous with 3 V-belts running fast (the motor runs at 3450 rpm) driven by a 7.5hp motor, were the belts to be exposed. Care is needed with these things for sure. I do have a partial belt gaur on mine but never finished the bottom half. The main wheel guard is a solid aluminum casting, in fine shape. Good that's the important one. The main castings of the saw are heavy aluminum, and they are in good shape. The upper casting, the one that swings up and down, had been fitted with a long handle but the handle broke out and is gone. This is the biggest issue with this saw. I'll probably just weld a 3/4" pipe socket at a 25° angle to a little steel plate and bolt it over the broken out hole in the casting, and use a piece of 3/4" pipe for a handle. Sounds good. No showstoppers so far. Good. This saw certainly *looks* like it could cut steel very seriously indeed. I think you'll be amazed once you get it up and running. Wayne Cook Shamrock, TX http://members.dslextreme.com/users/waynecook/index.htm |
#3
Posted to rec.crafts.metalworking
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big abrasive saw, initial report
On Fri, 02 Dec 2005 08:20:27 -0600, Wayne Cook
wrote: The vise is both cool and unfortunate. It's a nice cam-action vise which works quickly. The bad thing about it is it only works at 90° and 45°, can't cut any angle I want. I may think of a way to cobble but for now I'll go with it. That's one of the problems with the commercial saws like that. They're great for straight cuts. There are some out there that are miter saws which is what I want. They don't clamp as fast but there's just like a wood miter saw when it comes to versatility. If I ever manage to gather up enough round tiuts I'm going to overhaul mine into a miter saw. My 10" Kalamzoo is the only one of its kind that Ive ever seen. The entire saw portion is mounted on a 18" disk, so the engire saw may be turned at any angle, with two fixed cam locking vises providing hold down for the stock. It will cut about 60' in one direction and about 45 or so in the other. Gunner "Pax Americana is a philosophy. Hardly an empire. Making sure other people play nice and dont kill each other (and us) off in job lots is hardly empire building, particularly when you give them self determination under "play nice" rules. Think of it as having your older brother knock the **** out of you for torturing the cat." Gunner |
#4
Posted to rec.crafts.metalworking
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big abrasive saw, initial report
On Sat, 03 Dec 2005 13:11:22 GMT, Gunner Asch
wrote: On Fri, 02 Dec 2005 08:20:27 -0600, Wayne Cook wrote: The vise is both cool and unfortunate. It's a nice cam-action vise which works quickly. The bad thing about it is it only works at 90° and 45°, can't cut any angle I want. I may think of a way to cobble but for now I'll go with it. That's one of the problems with the commercial saws like that. They're great for straight cuts. There are some out there that are miter saws which is what I want. They don't clamp as fast but there's just like a wood miter saw when it comes to versatility. If I ever manage to gather up enough round tiuts I'm going to overhaul mine into a miter saw. My 10" Kalamzoo is the only one of its kind that Ive ever seen. The entire saw portion is mounted on a 18" disk, so the engire saw may be turned at any angle, with two fixed cam locking vises providing hold down for the stock. It will cut about 60' in one direction and about 45 or so in the other. The Ag department at the local school has one. I don't remember the brand right now though. Wayne Cook Shamrock, TX http://members.dslextreme.com/users/waynecook/index.htm |
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