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  #11  
Old 06-16-2019, 03:01 AM
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Dave Lee Dave Lee is offline
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Oh OK, I've done that once. Didn't know it had a name.


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  #12  
Old 06-16-2019, 03:06 AM
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You can cut a keyway on a lathe, winding the saddle by hand to cut like a shaper. It’s a bit of a pain in the butt but it works.
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  #13  
Old 06-16-2019, 01:53 PM
o7oBaseMetal o7oBaseMetal is offline
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Thanks for the illustration. Definitely different than what I was picturing.
The main trouble for me with doing this Dutch Key style is the way the tubing roller is built. Each shaft runs between a set of pillow block bearings so the die ends up riding in the center of the shaft and I don't think I would have an easy time drilling the Dutch Key in that area.

I saw a mrpete video that kinda looked like him cutting a keyway in a hole by taking a piece of parting tool, laying it sideways in a QCTP holder and using the feed to take off a couple thousands at a time with the lathe turned off and putting the workpiece in the chuck. Seems like that was kind of a makeshift version of the "broach" method from my understanding.

I really wanted to avoid a keyed shaft as I can use it to roll flat bar without dies but it likely wouldn't make a major difference. Plus I could always just buy a different shaft for the drive going between dies and no dies if it does make a difference. That or make a sleeve.


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  #14  
Old 06-16-2019, 03:41 PM
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Quote:
Originally Posted by o7oBaseMetal View Post
...the die ends up riding in the center of the shaft and I don't think I would have an easy time drilling the Dutch Key in that area...
Yeah, a Dutch Key will only work on the end of a shaft...
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  #15  
Old 06-16-2019, 04:49 PM
o7oBaseMetal o7oBaseMetal is offline
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Definitely still something I might use on something else in the future.

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