The Home Machinist!

I'm not sure that it work hardens like some steel or bronze alloys do when machined, but it does have a fatigue life.

This would get you close... https://www.ebay.com/itm/Van-Keuren-Light-Wave-Micrometer/111105462491?hash=item19de66d0db:g:tkUAAOxyPc5SB3P1 Van Keurens answer to the P&W Supermicrometer. How is one of those used (other than turning the large wheel). There seems to be a bunch of parts on it. What is t...

This would get you close...

https://www.ebay.com/itm/Van-Keuren-Lig ... xyPc5SB3P1

Van Keurens answer to the P&W Supermicrometer.

Use a 90° for chamfering, a 120° for 118° drills, and a 140° for 135° drills.

I was going to use it to check roundness of of shafts, etc.

A 90 degree V block will not detect tri-lobed shafting.

I've considered doing the same and decided the way to go would be to dress a wheel that was wide enough to make a single pass to 30 degrees. I have a sine chuck on my grinder so I would just set the chuck to 30 degrees and all would be good. The relief groove at the bottom of the V would give you ro...

While Import 5C collets are as you describe, some manufacturers, (Hardinge for one) "spring" their collets. This means that when relaxed, they are sprung slightly over size so the stock can easily slide through them.

I got rid of all of my Import (Chinese) 5C collets for the reason you describe.

I believe you are reading it incorrectly as they are +/- 50 millionths, not 5 tenths.

You are basically protecting the wiring from damage in this case, not the bulb.

3 hp Z
Hit and Miss Enterprises should have parts.

Looks Like a Fairbanks Morse Z

Just a side note... I have a friend that is still in rehab and was in intensive care for nearly sixty days with burns and skin grafts on over 25% of his upper body, arm, hand, neck, and face, after trying to start a vehicle by pouring gasoline in the carburetor. Something we have probably all done a...