The Shop > Tools
Making Simple QC Tool Holders
RussellT:
--- Quote from: Pete. on April 11, 2013, 08:54:59 AM ---Here, Russell. One small design change and you double your number of holders.
--- End quote ---
Thanks Pete, I understand now.
Russell
vtsteam:
RussellT-- I hadn't seen the disk before, but like it a lot. Yes on mine there are positions that the jacking screw misses -- although they are rare, and I can overcome that by adjusting the compound rest to different angle if need be. But I certainly will incorporate the disk now that I see it.
One thought, however--, I think there would be a great advantage in fixing it to the post solidly -- it would increase the bearing area and stiffness of the post. In fact I'm tempted to braze them together. Having once broken a tool holder truing crankshaft journals in flat bar stock with a cutoff tool, and suffering the effects of chatter on the journal finish, I will mod anything to help improve stiffness and strength at the toolpost.
Tubal Caine (the British version) once designed something he called the Gibraltar toolpost for crankshaft turning. It was a solid mass of cast iron set on the Myford table -- I'd like to make one for myself some day.
vtsteam:
Pete, Nice dwg! I had contemplated putting the tool slot at the side of the toolholder, as you show. Unfortunately, the Mason design is too narrow to do that -- the slots are too near the post bore. Since I've already cut mine out of stock on hand, I can't do it. But if someone else starts afresh and wants to, I'd recommend making the tool holders 2-1/2" square on top instead of 2" x 2-1/2", as shown by Mason.
vtsteam:
Idea:
Weld a bit of rod end to one side of a tool holder blank.
Then turn that to a JT-33 taper.
RussellT:
--- Quote from: vtsteam on April 11, 2013, 10:22:19 AM ---Idea:
Weld a bit of rod end to one side of a tool holder blank.
Then turn that to a JT-33 taper.
--- End quote ---
But then you can't use it for anything else. :scratch:
How about instead of milling a slot, drill the toolholder and cut a slot and add bolts so you can clamp round bars. Then turn a JT33 taper on a bit of round stock.
Here's a picture showing some toolholders.
Russell
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