The Home Machinist!

Not a standard symbol. Zustellbetrag seems to mean "feed increment", if that's any help. The double tilde usually means "approximately equal".

Might also be a reluctance sensor, in which case it will have a small magnet inside. Could be an inductive sensor. How old is the machine? Do you have a picture of it in place?

Only if they are made of materials with identical coefficients of thermal expansion.

Kelly Jones writes: 2024 (and other aluminum alloys) are precipitation hardening. That means given temperature an time, alloying elements will migrate within the metal and form tiny clumps, which strengthen the alloy. Some alloys do this at room temperature. I recall reading of a vendor who shipped ...

Good points. A 120 V universal series motor with no load will turn slowly when connected to 12 VDC. Odds are that the diode blew for a reason and so will just blow again, but replacing it is worth a try. If it is a universal motor it will run on AC. To reverse a series motor you must swap the leads ...

You should see about the same resistance as an electric drill. Replace the popped diode with one rated at least 10 amps and 250 volts.

Is there a sizable control circuit between the wall socket and the motor? It would be unpractical and uneconomical to convert 120AC to 12VDC for a motor if a 120V motor could be specified. My guess, not knowing much about, is that the motor is a universal motor, reversible and variable speed like i...

tornitore45 wrote: ↑

Sun Sep 16, 2018 12:44 pm

A lathe bed has to be flat. Leveling is the usual way to achieve that but not the only one.

OK John do not keep us in suspense.

http://www.homews.co.uk/page318.html

A lathe bed has to be flat. Leveling is the usual way to achieve that but not the only one.

I'm quite certain that exporting copper tube does not require an ITAR license.

It's possible that McMaster does sell stuff that would require a license and rather than go through their catalog and figure out which things can be exported and which can't they've taken the easy way out.

Just use center drills. They work fine.

Note that horizontal alignment error is much more important than vertical. If the far end of your bar is .001" closer to the toolpost than it is near the chuck then you are going to get a diameter .002" smaller out there. If the far end of the bar is .001" higher than it is up by the chuck then a to...