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[Doc Nickel]

I'd wager that collet was already cracked before you ever tried to expand it- likely came that way from the factory. Note the dark line on the inner edge...

[Doc Nickel]

-I have the factory metric transposing gears for my Sheldon, got 'em with the machine 12 years ago. Never used 'em, because it's too much of a pain....

[Doc Nickel]

Thanks Fast. Using an online calculator, it seems that something that cost $5400 in 1953, cost $3500 in 1943- that's a lot of post-war inflation!
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[Doc Nickel]

I've been seeing a LOT of 3D printed home-shop machine parts, at least listed on eBay. Spindle nose thread protectors, which are apparently pretty hard...

[Doc Nickel]

I haven't tried them, but as they come relatively early in the geartrain, I'd suspect they're stronger than you might think, simply from the mechanical...

[Doc Nickel]

My connection is too slow to read that at anything over "glacial" speed, can anyone tell me- if it's in there- what a '43 16x56" Springfield...

[Doc Nickel]

The reason they don't have bolt slots is these kinds of fixtures were originally intended for use on surface grinders, where, as Toolguy notes, you just...

[Doc Nickel]

Ah. Then yes, the VFD is undersized. Again, a cheap 5HP static converter might get you up and running while you work on a better power supply.
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[Doc Nickel]

By "acceleration", he means how fast the controller in the VFD "ramps" it up to full speed. You can set it to take 30 seconds, or...

[Doc Nickel]

-What little I've run mine so far (10HP/3Ph) was done using a $90 eBay static converter. Ran fine, never had any trouble starting up, never grunted when...