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| wongster:
I thought I am... just need to do 1/2 the job and the rest get done on its own... :doh: My Sherline's blade is 0.04". I'll use that to do the job. Thanks Dave. Regards, Wong |
| arnoldb:
Hi Wong I've been quietly following along - you're doing fine, and running into all the same problems all of us faced at one point or another.. If you don't have a parting tool of a suitable width to make an undercut for the thread like Dave suggested, you can also just drill out a short section of the threads in the block - just as deep as the bit that's not screwing home - to the same size as the thread's outer diameter. I also see that the cutting tool left a radius in the corner between the male thread and its shoulder - this will also prevent the two workpieces screwing together up to the shoulder once you have the thread sorted; you can just use a countersink (or a larger drill bit) to add an additional chamfer to the hole in the block, and that should solve the problem there. If you make an undercut using a parting tool, you won't have this last problem though. :beer:, Arnold |
| wongster:
Hi Arnold, That's a good one! I should have incorporate this while drilling and tapping the hole in the Base. Since the rod is still in the lathe, I'll try the undercut first. Just need to figure out how I should mount the Sherline part off tool on the Proxxon QCTP. Regards, Wong |
| wongster:
This session is extremely short; While my wife is having her shower, I steal into the shop to do the undercut for the screw thread I did yesterday night. The parting tool from AR Warner in use. It was squared up using the jaw of the 3 jaw chuck as reference. I tested the Base on the thread after each bit of cutting done till it sit almost flash. Seemed to be so in this pic. Turning the chuck around to check. The little gap formed doesn't seem to be uniformed throughout. The base was screwed on finger tight. It may be the tapped hole being out of square. I'll check again when I get home after work tonight. Regards, Wong |
| DaveH:
Wong, Looking good :thumbup: :clap: Take your time, and that little gap, we all get that sometimes, just that we tighten it up and don't say anything. :) :beer: DaveH |
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