2015 POTD Thread Archive

I made a 10X scale micrometer as a project in junior high shop class. We threaded the 4 tpi micrometer thread with a router and 60 deg. V bit. Made a mount to set the router to the compound. It worked well, I recall using mohagany (fairly open grained) for the spindle.

My son makes exotic wooden chop sticks on my Grizzly G0709 (with a taper attachment). We use a HF die grinder with a carbide bit mounted to the compound, does a really nice job and leaves a smooth finish. The G0709 has a top speed of 2000 rpm, probably need 5000 for wood 1/4" diameter. So instead of spinning the work to speed against the tool, we spin the tool to speed.

Bruce
 
BGHansen said:
I made a 10X scale micrometer as a project in junior high shop class. We threaded the 4 tpi micrometer thread with a router and 60 deg. V bit. Made a mount to set the router to the compound. It worked well, I recall using mohagany (fairly open grained) for the spindle.

My son makes exotic wooden chop sticks on my Grizzly G0709 (with a taper attachment). We use a HF die grinder with a carbide bit mounted to the compound, does a really nice job and leaves a smooth finish. The G0709 has a top speed of 2000 rpm, probably need 5000 for wood 1/4" diameter. So instead of spinning the work to speed against the tool, we spin the tool to speed.

Bruce
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Yes, using a "powered" wood cutting tool makes sense to me. Waiting for Pops to share some details of his technique.
Your story about the 10X scale micrometer in JH shop class brings a smile to my face. No better way to learn about how a micrometer works and learn some basic manufacturing techniques. I love it.
I was talking to a Paint Store clerk recently and he told me that his 12 year old son is NOT taught cursive writing in school. I was so stunned, I didn't ask if it was a public school or ?? I guess that discussion is for a different thread (maybe a different forum).
 
roadie33 said:
Finished up another ER40 Collet Chuck to hold stock in the Mill Vise to machine.
Started out with a leftover piece of 2 1/2" 12L14 I had laying around.
Milled 4 sides flat to 2" across. Then chucked it up in the 4 jaw and turned an end down to 50mm.
Then changed the gears on the Craftsman to thread metric 1.5mm with the QCGB.
Turned out great.
Now I need to order 2 more nuts for it and the next one I make for Hex stock, so I don't have to keep swapping them with the chuck I use on the lathe.
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Uh, may be a dumb question but why not try turning and threading the nuts/caps yourself?
 
Whyemier said:
Uh, may be a dumb question but why not try turning and threading the nuts/caps yourself?
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There is an off center lip inside an ER nut. The lip keys into the groove in the ER collet and retracts the collet from the taper when the nut is loosened. That lip would be too tricky for me to machine and, as Dan wrote, the nuts can be bought for reasonable $$.
 
extropic said:
I was talking to a Paint Store clerk recently and he told me that his 12 year old son is NOT taught cursive writing in school. I was so stunned, I didn't ask if it was a public school or ?? I guess that discussion is for a different thread (maybe a different forum).
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That's true. On the other hand, they probably learn to type a lot earlier than we did. 7th grade for me, back in 61 or 62.
 
That's correct on the ER nuts. To hard to machine that lip inside. That's why I just buy them.
Found 3 on Flea-bay for $16 so I am set now.
 
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