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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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Getting Jacobs chuck off arbor
"xray" wrote in message ... I have a Jacobs 14N 1/2" chuck for the tailstock of my lathe. The MT2 arbor it is mounted on has spun in some past life and is a bit munged up. I ordered a new JT3 to MT2 arbor for it, but now I find I can't budge the existing arbor out of the chuck. It's not rusty. I've soaked it penetrating oil for about a day. I tried heating it with a torch and then later by baking it in the oven. Quickly cooled the arbor with a wet sponge while the chuck was still several hundred degrees from the oven. I've succeded in slightly bending a Starrett center punch trying to pound the arbor through the center hole in the chuck. Any tips on things I could try to break up this long-term relationship? I have two wedges with slots in them. Put one on each side and they overlap some and then tighten in a "C" clamp or vise and the chuck comes right off. I've had them forever and I'm farily certain they are commercial but they could be fabricated easily. |
#2
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Getting Jacobs chuck off arbor
If you have, or can get a front end fork tool of the right size from an
automotive store you could tap it in between the chuck and the barrel to loosen the taper. If the barrel has turned, it means the traveler screw that rides in a slot has been lost or broken. If you can get it apart it's no big deal to repair. Bugs |
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