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@stephen thomas, there's also a good one at 217 Border City Road in Geneva, NY, M&M Electrical Surplus. Haven't bought there in a few years, but the prices were good back when..

I've spliced mine a few times over the time I've owned the lathe. All the pictures I've found are a little fuzzy, so the last time I did mine, I recorded the procedure. I've attached an image...

I had to buy them. They aren't quite as convenient as conventional telescoping bore gauges. I tried them on a number of well known hole sizes, and they gave good results. Slow, but the point at...

Another interesting way the rules are followed exists in Manhattan. There's a wire around a good chunk of the island called an eruv, which makes the space inside the wire a "private space" to allow...

When I was a kid, we had a strange accident on the bridge between Phillipsburg, NJ and Easton PA. The approach to the bridge was kind of an S curve, and a truck carrying hanging sides of beef ran up...

Another Tool Thrift Shop curiosity. I have never seen what I think are bore gauges like these, and we had two different ones come in within two weeks. They are manufactured by J T Slocomb:
...

If you use evaporust, be sure to keep the object fully submerged. Evaporust will eat a line around your item at the air/liquid interface.

Is the knurled area above the rest of the features on the bar? If so,could you broach the axial grooves and turn the circumferential groves, perhaps with a form tool to cut many at once?

I think there will be two groups that are really damaged by the proposed changes.

1. No-skill workers, as they are on a collision course of increasing wages and decreasing cost of automation.
...

Phil's comment about measuring the current is important. One of the references I didn't post mentioned that too large a run capacitor can smoke the winding. If it were me, I'd get a current reading...

I had to dig into this a little more. This page purports to calculate the capacitor size:

Single phase Motor Capacitor Calculation calculator | Electrical4u

It gives a 23 microfarad value for...

I'd like to hear some of the experts chime in. Two thoughts that came to mind:

1. Aren't servo motors a type of two phase AC motor? Would there have been a reason to put that sort of drive on a...

Not meaning to promote these folks, but this video gives a very good indication of the machines and processes needed.

Custom Aluminum: Extrusion - YouTube

A newer one

Aluminium Casting and...

Am I missing something? I have no practical experience, but couldn't a live tool cnc lathe and a buff get you 99% of the way there? The only feature I see that's a problem is the square bottom key...

Years ago I interviewed at a mercury cell chlor-alkali plant. we had to leave our wallets in the office when we toured the facility, as the magnetic stripes would be compromised. The cells used...

Edwin, you are describing how optical mice work. Many mice claim >10000 dpi. This one claims 12,000 for under $30:

Corsair HARPOON RGB PRO FPS / MOBA Gaming Mouse, Black, Backlit RGB LED, 12000...

When you are going down the stairs, skip the wheels and just skid the equipment on the rails. Friction going down is your friend. Also, if you are using a hand cranked winch, don't use a standard...

Sold! So to speak.

I'm just showing my ignorance. They are labeled BCCO ASP30 CL.AA 32 D.P. 20° P.A. L.A. 0° 44' and then 13,14,15.... Maybe it's a sequence number or something.

We had another interesting donation at the used tool store.

Six Colman gear hobs, 32DP, 20 degree pressure angle, hobs for 13,14,15,16,17, and 18 tooth gears. These hobs were never used. But...

Keep in mind that a 65A breaker does not trip at 65A. There is a characteristic curve that allows higher currents for shorter periods of time.
...

@gbent, Robin Renzetti has several videos about lapping in a surface plate. He is well aware of the issues mentioned in your second paragraph above, and is using a technique using weights to...

The use of code words was to reduce the cost and improve accuracy of cable and telegraph orders. These codes persisted for a long time. One of my favorite old catalogs is a Cleveland twist drill...

Probably not quite what you are looking for, but these pliers have an important difference.

My favorite locking pliers far and away are the Lever Wrench brand locking pliers. The adjustment on...

It's not as simple as two in series gives more pressure but the same flow (assuming centrifugal pumps). Your coolant system has what is called a characteristic curve that is the flow that will occur...

This reminds me of a childhood experience with a trailer fire. It was much worse than this one. It took place on June 26,1964 in Marshalls Creek, PA

A driver had a mixed load of explosives,...