Sawmill and Timber
Business and markets => Wanted => Topic started by: HaroldCR - AKA Fla.-Deadheader on January 19, 2019, 07:45:38 AM
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Need.2.different.sizes.in.a.steel.single.3".long.X.1".ID.coupler
Ideas?
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Without access to a machine shop the only thing I can come up with is the edge of a bastard file. It'll take a long time but the price is right.
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If you have a lathe, you can drag cut them. The lathe chuck holds the part and lock the spindle, and then crank the carriage back and forth with a sized took in a boring bar holder.
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I believe the piece of steel is too hard to cut the keyway. A file just barely makes a mark. ::)
It wasn't all that hard to turn in my home built lathe. I have thought about milling a spot on the side and then drilling across to make a groove in the shafts to act as a key with a capscrew. Poor old drill press chuck is nearly ruined by using a milling cutter in it for other projects.
Rigged up an external keyboard that mostly works, so, I might try to do a photo upload of the bastard swingblade mill conversion.
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You could use whats called a Dutchman if the pieces are flush drill a hole half in the shaft drive in a round pin. Also an angle grinder and cut 0ff wheel and a shitload of patience. I have done it with a good file. Frank C.
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I have cut several keyways on shafts and a couple in pulleys, etc. I have mini file set and a very small coldchisel. Metal is not easily obtained, out here in the jungle, hence, the harder than normal piece of 2" I have at hand. Coupler is 1" ID.
The end drilling and round pin sounds interesting. I need to harness up to 30 HP, cutting hard wood, at times.
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How about grinding a small flat spot on the shaft and driving a gib key in between the shaft and pully/sprocket/coupler/whatever to lock it on the shaft? The gib key will swage itself some and provide pretty good holding power I reckon.
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Thinking about something very similar, doing 2 flat spots on the gearbox shaft. Real problem is inside the coupler. Even thinking about drilling through and doing a hard bolt.
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Could just do a square shaft instead of attempting a keyway.
Grind it square then drill a hole and square it out with a file.
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Weld it. 8)
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Naah, Ox. Drilled and tapped the stub shaft/coupler for 5/16 hard bolt. Need to recess the bolt head. Probably do that to the gearbox when I remove it, for more drilling, adding features to the arm that gear box bolts up to.