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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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homemade flex couplers
(view in Courier font)
.--. |
#2
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homemade flex couplers
wrote in message ... (view in Courier font) .--. . .--. \ . . | / \ / b. | - |//| |.--' '----'/ . a. |'--. .----. / | - |/ \ / / /. .: / ' -- ' : bore _ |=| [___] --clamp screw a = "hinge" b = "cut" I've made some homemade flex couplers using setscrews to bite the shafts, but clamps are sooo much classier. This crappy drawing is an end view of the clamp portion of a helical flexible beam coupler. Question: how's that cut made, from b. to a.? TIA, James Arthur you mean on ones like these: http://eolsurplus.com/images/Helical6005-12-6.jpg |
#3
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homemade flex couplers
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#4
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homemade flex couplers
On Nov 10, 6:33 am, "Nik Rim" wrote:
wrote in message ... (view in Courier or other fixed font) .--. . .--. \ . . | / \ / b. | - |//| |.--' '----'/ . a. |'--. .----. / | - |/ \ / / /. .: / ' -- ' : bore _ |=| [___] --clamp screw a = "hinge" b = "cut" I've made some homemade flex couplers using setscrews to bite the shafts, but clamps are sooo much classier. This crappy drawing is an end view of the clamp portion of a helical flexible beam coupler. Question: how's that cut made, from b. to a.? TIA, James Arthur you mean on ones like these: http://eolsurplus.com/images/Helical6005-12-6.jpg Yes, exactly, and it's the slit that forms the clamp that I don't get-- it's deep and narrow, with a blind, square bottom. How do they do that? I made my own by turning and boring a cylinder (steel), then saw- cutting slits to create the flexible surfaces. They're surprisingly nice, and not that hard to make. But, the setscrew thing mars the shafts, and doesn't grip as securely as a clamp. (I guess I could stuff a wad of brass in front of the screw-tips to prevent the marring, come to think of it). James Arthur |
#5
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homemade flex couplers
On Nov 10, 9:10 am, Ned Simmons wrote:
On Mon, 9 Nov 2009 18:59:02 -0800 (PST), wrote: (view in Courier or other fixed font) .--. . .--. \ . . | / \ / b. | - |//| |.--' '----'/ . a. |'--. .----. / | - |/ \ / / /. .: / ' -- ' : bore _ |=| [___] --clamp screw a = "hinge" b = "cut" I've made some homemade flex couplers using setscrews to bite the shafts, but clamps are sooo much classier. This crappy drawing is an end view of the clamp portion of a helical flexible beam coupler. Question: how's that cut made, from b. to a.? Slitting saw. If you were to look at a section thru the cut you'd see a radius equal to that of the saw adjacent to "a" in your drawing. -- Ned Simmons Really? I just posted the opposite, that the cut's square-bottomed, but now that you say it I'm not so sure. Would the hinge be flexible enough with a big arc of metal left at the bottom of that cut? I wouldn't think so, but if you're right it must be. James Arthur |
#6
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homemade flex couplers
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#8
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homemade flex couplers
On Nov 10, 9:50 am, Ned Simmons wrote:
On Tue, 10 Nov 2009 06:24:49 -0800 (PST), wrote: On Nov 10, 9:10 am, Ned Simmons wrote: On Mon, 9 Nov 2009 18:59:02 -0800 (PST), wrote: (view in Courier or other fixed font) .--. . .--. \ . . | / \ / b. | - |//| |.--' '----'/ . a. |'--. .----. / | - |/ \ / / /. .: / ' -- ' : bore _ |=| [___] --clamp screw a = "hinge" b = "cut" I've made some homemade flex couplers using setscrews to bite the shafts, but clamps are sooo much classier. This crappy drawing is an end view of the clamp portion of a helical flexible beam coupler. Question: how's that cut made, from b. to a.? Slitting saw. If you were to look at a section thru the cut you'd see a radius equal to that of the saw adjacent to "a" in your drawing. -- Ned Simmons Really? I just posted the opposite, that the cut's square-bottomed, but now that you say it I'm not so sure. Would the hinge be flexible enough with a big arc of metal left at the bottom of that cut? I wouldn't think so, but if you're right it must be. I've got a Helical brand beam coupling and a Huco Oldham coupling in front of me and both have a radiused bottom on the slit on the far side of the bore. -- Ned Simmons Thanks! I just spent half an hour digging to see if I had one somewhere, but couldn't find a dang thing. 'Preciate that. James Arthur |
#9
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homemade flex couplers
On Nov 10, 11:09 am, "Steve W." wrote:
Ned Simmons wrote: On Tue, 10 Nov 2009 06:24:49 -0800 (PST), wrote: On Nov 10, 9:10 am, Ned Simmons wrote: On Mon, 9 Nov 2009 18:59:02 -0800 (PST), wrote: (view in Courier or other fixed font) .--. . .--. \ . . | / \ / b. | - |//| |.--' '----'/ . a. |'--. .----. / | - |/ \ / / /. .: / ' -- ' : bore _ |=| [___] --clamp screw a = "hinge" b = "cut" I've made some homemade flex couplers using setscrews to bite the shafts, but clamps are sooo much classier. This crappy drawing is an end view of the clamp portion of a helical flexible beam coupler. Question: how's that cut made, from b. to a.? Slitting saw. If you were to look at a section thru the cut you'd see a radius equal to that of the saw adjacent to "a" in your drawing. -- Ned Simmons Really? I just posted the opposite, that the cut's square-bottomed, but now that you say it I'm not so sure. Would the hinge be flexible enough with a big arc of metal left at the bottom of that cut? I wouldn't think so, but if you're right it must be. I've got a Helical brand beam coupling and a Huco Oldham coupling in front of me and both have a radiused bottom on the slit on the far side of the bore. Without that radius at the bottom you would have a real nasty stress point at the corners of the slot. -- Steve W. Yep, both that and how thin the "hinge" was troubled me--it didn't look strong enough. I was thinking of forming the "pivot" area of the hinge (the part near 'a', the portion that bends as you tighten the clamp) by drilling, thus forming a rounded, stress-relief area. Like this (crappy drawing #2): (view in Courier, or other fixed font) / / / / | a. ___ | _ / \ | / \_____| |_____ | | _____ _____ | \_/ | | | \___/ | \ \ \ \ / \_______________/ I still might do that. Thanks a bunch to all, James Arthur |
#10
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homemade flex couplers
On Tue, 10 Nov 2009 08:36:20 -0800 (PST),
wrote: On Nov 10, 9:50 am, Ned Simmons wrote: On Tue, 10 Nov 2009 06:24:49 -0800 (PST), wrote: Would the hinge be flexible enough with a big arc of metal left at the bottom of that cut? I wouldn't think so, but if you're right it must be. I've got a Helical brand beam coupling and a Huco Oldham coupling in front of me and both have a radiused bottom on the slit on the far side of the bore. -- Ned Simmons Thanks! I just spent half an hour digging to see if I had one somewhere, but couldn't find a dang thing. 'Preciate that. James Arthur I just remembered a part I designed in the not too distant past that had that detail... http://www.suscom-maine.net/~nsimmon...earExample.pdf -- Ned Simmons |
#11
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homemade flex couplers
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#12
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homemade flex couplers
On Tue, 10 Nov 2009 11:09:39 -0500, "Steve W."
wrote: Ned Simmons wrote: On Tue, 10 Nov 2009 06:24:49 -0800 (PST), wrote: On Nov 10, 9:10 am, Ned Simmons wrote: On Mon, 9 Nov 2009 18:59:02 -0800 (PST), wrote: (view in Courier or other fixed font) .--. . .--. \ . . | / \ / b. | - |//| |.--' '----'/ . a. |'--. .----. / | - |/ \ / / /. .: / ' -- ' : bore _ |=| [___] --clamp screw a = "hinge" b = "cut" I've made some homemade flex couplers using setscrews to bite the shafts, but clamps are sooo much classier. This crappy drawing is an end view of the clamp portion of a helical flexible beam coupler. Question: how's that cut made, from b. to a.? Slitting saw. If you were to look at a section thru the cut you'd see a radius equal to that of the saw adjacent to "a" in your drawing. -- Ned Simmons Really? I just posted the opposite, that the cut's square-bottomed, but now that you say it I'm not so sure. Would the hinge be flexible enough with a big arc of metal left at the bottom of that cut? I wouldn't think so, but if you're right it must be. I've got a Helical brand beam coupling and a Huco Oldham coupling in front of me and both have a radiused bottom on the slit on the far side of the bore. Without that radius at the bottom you would have a real nasty stress point at the corners of the slot. Indeed. Say..if there are any questions..why not call Rocom..makers of Rocom Couplers http://www.rocomcorp.com/ One of my clients, and a friend. Ask for the Big Kahuna...tell him Gunner refered you. 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#13
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homemade flex couplers
On Nov 10, 12:15 pm, Ned Simmons wrote:
On Tue, 10 Nov 2009 08:36:20 -0800 (PST), wrote: On Nov 10, 9:50 am, Ned Simmons wrote: On Tue, 10 Nov 2009 06:24:49 -0800 (PST), wrote: Would the hinge be flexible enough with a big arc of metal left at the bottom of that cut? I wouldn't think so, but if you're right it must be. I've got a Helical brand beam coupling and a Huco Oldham coupling in front of me and both have a radiused bottom on the slit on the far side of the bore. -- Ned Simmons Thanks! I just spent half an hour digging to see if I had one somewhere, but couldn't find a dang thing. 'Preciate that. James Arthur I just remembered a part I designed in the not too distant past that had that detail...http://www.suscom-maine.net/~nsimmon...earExample.pdf -- Ned Simmons Nice part. I wish my ASCII drawings looked that good! -- Cheers, James Arthur |
#14
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homemade flex couplers
On Nov 10, 1:15 pm, bharbour
wrote: wrote: On Nov 10, 9:10 am, Ned Simmons wrote: On Mon, 9 Nov 2009 18:59:02 -0800 (PST), wrote: (view in Courier or other fixed font) .--. . .--. \ . . | / \ / b. | - |//| |.--' '----'/ . a. |'--. .----. / | - |/ \ / / /. .: / ' -- ' : bore _ |=| [___] --clamp screw a = "hinge" b = "cut" I've made some homemade flex couplers using setscrews to bite the shafts, but clamps are sooo much classier. This crappy drawing is an end view of the clamp portion of a helical flexible beam coupler. Question: how's that cut made, from b. to a.? Slitting saw. If you were to look at a section thru the cut you'd see a radius equal to that of the saw adjacent to "a" in your drawing. -- Ned Simmons Really? I just posted the opposite, that the cut's square-bottomed, but now that you say it I'm not so sure. Would the hinge be flexible enough with a big arc of metal left at the bottom of that cut? I wouldn't think so, but if you're right it must be. James Arthur A Slitting saw should give you a fairly square bottom on the cut. They are spooky buggers to use though, a lot of teeth and a big unguarded area. BobH The problem's at the blind end of the cut, at the place I've labeled "a". There, using a slitting saw you get a radiused tab at the end of the cut, at the bottom. Here's a drawing attempt: a section illustrating 1/2 of the clamp & showing the inside of the cut: (view in Courier or other fixed font) _________________ / \ / \ / \ / \ / \ | ___ | | a. / \ b. | ^ | _______| |_________| ^ |__|_|_______________________________| | |_______ _________ | | | | | \___/ | | | \ / \ / \ / \ / \_________________/ . ------ . . ' ' . . . -- . . a. / _______/ /_________.| / /| | | b.|| | || | | || | || | | || | || | | || | |/\ | | || | \ \ | .' '| || | \ \___|/ |_________|/ | \/____________________/| / || / || left by saw's radius So, if you can follow these drawings, you can see that a slitting saw's radius does not cut a square bottom, in that its radius leaves an arc-shaped tab uncut at the bottom, at the end of the cut. I thought that'd be a problem, but apparently it's not. Hope that's clear. Cheers, James Arthur |
#15
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homemade flex couplers
On Nov 10, 4:36 pm, Gunner Asch wrote:
On Tue, 10 Nov 2009 11:09:39 -0500, "Steve W." wrote: Ned Simmons wrote: On Tue, 10 Nov 2009 06:24:49 -0800 (PST), wrote: On Nov 10, 9:10 am, Ned Simmons wrote: On Mon, 9 Nov 2009 18:59:02 -0800 (PST), wrote: (view in Courier or other fixed font) .--. . .--. \ . . | / \ / b. | - |//| |.--' '----'/ . a. |'--. .----. / | - |/ \ / / /. .: / ' -- ' : bore _ |=| |=| [___] --clamp screw a = "hinge" b = "cut" I've made some homemade flex couplers using setscrews to bite the shafts, but clamps are sooo much classier. This crappy drawing is an end view of the clamp portion of a helical flexible beam coupler. Question: how's that cut made, from b. to a.? Slitting saw. If you were to look at a section thru the cut you'd see a radius equal to that of the saw adjacent to "a" in your drawing. -- Ned Simmons Really? I just posted the opposite, that the cut's square-bottomed, but now that you say it I'm not so sure. Would the hinge be flexible enough with a big arc of metal left at the bottom of that cut? I wouldn't think so, but if you're right it must be. I've got a Helical brand beam coupling and a Huco Oldham coupling in front of me and both have a radiused bottom on the slit on the far side of the bore. Without that radius at the bottom you would have a real nasty stress point at the corners of the slot. Indeed. Say..if there are any questions..why not call Rocom..makers of Rocom Couplers http://www.rocomcorp.com/ One of my clients, and a friend. Ask for the Big Kahuna...tell him Gunner refered you. Nice stuff they have there Gunner, but buying couplers would be faster, easier, better, and cheaper. That kinda defeats the whole purpose of making your own, doesn't it? Grins, James Arthur |
#16
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homemade flex couplers
On Tue, 10 Nov 2009 20:03:40 -0800 (PST),
wrote: On Nov 10, 4:36 pm, Gunner Asch wrote: On Tue, 10 Nov 2009 11:09:39 -0500, "Steve W." wrote: Ned Simmons wrote: On Tue, 10 Nov 2009 06:24:49 -0800 (PST), wrote: On Nov 10, 9:10 am, Ned Simmons wrote: On Mon, 9 Nov 2009 18:59:02 -0800 (PST), wrote: (view in Courier or other fixed font) .--. . .--. \ . . | / \ / b. | - |//| |.--' '----'/ . a. |'--. .----. / | - |/ \ / / /. .: / ' -- ' : bore _ |=| |=| [___] --clamp screw a = "hinge" b = "cut" I've made some homemade flex couplers using setscrews to bite the shafts, but clamps are sooo much classier. This crappy drawing is an end view of the clamp portion of a helical flexible beam coupler. Question: how's that cut made, from b. to a.? Slitting saw. If you were to look at a section thru the cut you'd see a radius equal to that of the saw adjacent to "a" in your drawing. -- Ned Simmons Really? I just posted the opposite, that the cut's square-bottomed, but now that you say it I'm not so sure. Would the hinge be flexible enough with a big arc of metal left at the bottom of that cut? I wouldn't think so, but if you're right it must be. I've got a Helical brand beam coupling and a Huco Oldham coupling in front of me and both have a radiused bottom on the slit on the far side of the bore. Without that radius at the bottom you would have a real nasty stress point at the corners of the slot. Indeed. Say..if there are any questions..why not call Rocom..makers of Rocom Couplers http://www.rocomcorp.com/ One of my clients, and a friend. Ask for the Big Kahuna...tell him Gunner refered you. Nice stuff they have there Gunner, but buying couplers would be faster, easier, better, and cheaper. That kinda defeats the whole purpose of making your own, doesn't it? Grins, James Arthur You guys actually buy em? Damn..and Ive been getting all mine free. The OmniTurn CNC lathes that I service use 2 of them and I keep a handful in the truck all the time. Course..the owner is my friend....G Gunner "Aren't cats Libertarian? They just want to be left alone. I think our dog is a Democrat, as he is always looking for a handout" Unknown Usnet Poster Heh, heh, I'm pretty sure my dog is a liberal - he has no balls. Keyton |
#17
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homemade flex couplers
"Gunner Asch" wrote in message ... On Tue, 10 Nov 2009 20:03:40 -0800 (PST), wrote: On Nov 10, 4:36 pm, Gunner Asch wrote: On Tue, 10 Nov 2009 11:09:39 -0500, "Steve W." wrote: Ned Simmons wrote: On Tue, 10 Nov 2009 06:24:49 -0800 (PST), wrote: On Nov 10, 9:10 am, Ned Simmons wrote: On Mon, 9 Nov 2009 18:59:02 -0800 (PST), wrote: (view in Courier or other fixed font) .--. . .--. \ . . | / \ / b. | - |//| |.--' '----'/ . a. |'--. .----. / | - |/ \ / / /. .: / ' -- ' : bore _ |=| |=| [___] --clamp screw a = "hinge" b = "cut" I've made some homemade flex couplers using setscrews to bite the shafts, but clamps are sooo much classier. This crappy drawing is an end view of the clamp portion of a helical flexible beam coupler. Question: how's that cut made, from b. to a.? Slitting saw. If you were to look at a section thru the cut you'd see a radius equal to that of the saw adjacent to "a" in your drawing. -- Ned Simmons Really? I just posted the opposite, that the cut's square-bottomed, but now that you say it I'm not so sure. Would the hinge be flexible enough with a big arc of metal left at the bottom of that cut? I wouldn't think so, but if you're right it must be. I've got a Helical brand beam coupling and a Huco Oldham coupling in front of me and both have a radiused bottom on the slit on the far side of the bore. Without that radius at the bottom you would have a real nasty stress point at the corners of the slot. Indeed. Say..if there are any questions..why not call Rocom..makers of Rocom Couplers http://www.rocomcorp.com/ One of my clients, and a friend. Ask for the Big Kahuna...tell him Gunner refered you. Nice stuff they have there Gunner, but buying couplers would be faster, easier, better, and cheaper. That kinda defeats the whole purpose of making your own, doesn't it? Grins, James Arthur You guys actually buy em? Damn..and Ive been getting all mine free. The OmniTurn CNC lathes that I service use 2 of them and I keep a handful in the truck all the time. Course..the owner is my friend....G Gunner "Aren't cats Libertarian? They just want to be left alone. I think our dog is a Democrat, as he is always looking for a handout" Unknown Usnet Poster Heh, heh, I'm pretty sure my dog is a liberal - he has no balls. Keyton Or you are stuck in a lime grove in the middle of no where in Southern California with the flex coupler on an older Mercedes steering broke. My dad manufactured a new one out of an old tire they found. Always good to be handy. This was back in about 1960. |
#18
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homemade flex couplers
On Tue, 10 Nov 2009 22:34:27 -0800, "Bill McKee"
wrote: "Gunner Asch" wrote in message .. . On Tue, 10 Nov 2009 20:03:40 -0800 (PST), wrote: On Nov 10, 4:36 pm, Gunner Asch wrote: On Tue, 10 Nov 2009 11:09:39 -0500, "Steve W." wrote: Ned Simmons wrote: On Tue, 10 Nov 2009 06:24:49 -0800 (PST), wrote: On Nov 10, 9:10 am, Ned Simmons wrote: On Mon, 9 Nov 2009 18:59:02 -0800 (PST), wrote: (view in Courier or other fixed font) .--. . .--. \ . . | / \ / b. | - |//| |.--' '----'/ . a. |'--. .----. / | - |/ \ / / /. .: / ' -- ' : bore _ |=| |=| [___] --clamp screw a = "hinge" b = "cut" I've made some homemade flex couplers using setscrews to bite the shafts, but clamps are sooo much classier. This crappy drawing is an end view of the clamp portion of a helical flexible beam coupler. Question: how's that cut made, from b. to a.? Slitting saw. If you were to look at a section thru the cut you'd see a radius equal to that of the saw adjacent to "a" in your drawing. -- Ned Simmons Really? I just posted the opposite, that the cut's square-bottomed, but now that you say it I'm not so sure. Would the hinge be flexible enough with a big arc of metal left at the bottom of that cut? I wouldn't think so, but if you're right it must be. I've got a Helical brand beam coupling and a Huco Oldham coupling in front of me and both have a radiused bottom on the slit on the far side of the bore. Without that radius at the bottom you would have a real nasty stress point at the corners of the slot. Indeed. Say..if there are any questions..why not call Rocom..makers of Rocom Couplers http://www.rocomcorp.com/ One of my clients, and a friend. Ask for the Big Kahuna...tell him Gunner refered you. Nice stuff they have there Gunner, but buying couplers would be faster, easier, better, and cheaper. That kinda defeats the whole purpose of making your own, doesn't it? Grins, James Arthur You guys actually buy em? Damn..and Ive been getting all mine free. The OmniTurn CNC lathes that I service use 2 of them and I keep a handful in the truck all the time. Course..the owner is my friend....G Gunner "Aren't cats Libertarian? They just want to be left alone. I think our dog is a Democrat, as he is always looking for a handout" Unknown Usnet Poster Heh, heh, I'm pretty sure my dog is a liberal - he has no balls. Keyton Or you are stuck in a lime grove in the middle of no where in Southern California with the flex coupler on an older Mercedes steering broke. My dad manufactured a new one out of an old tire they found. Always good to be handy. This was back in about 1960. Indeed. Ive seen that done more than once, including big trucks. My mechanic rebuilt the flex on my old drill rig out on the line in the middle of sweet **** all in Montana, using a tire. It was still in there when I quit Western Geophysical a couple years and 5 states later. Gunner "Aren't cats Libertarian? They just want to be left alone. I think our dog is a Democrat, as he is always looking for a handout" Unknown Usnet Poster Heh, heh, I'm pretty sure my dog is a liberal - he has no balls. Keyton |
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