How do I know the model?

[JPG]

Welcome to the forum Ed.
ALL headstocks prior to 2010 where a 500. . . .

???????? The 510 came out in the mid 80's. Your point is?????

You meaning NOT Power Pro? That's WHY I wrote prior to 2010.

The headstock does not vary with the 500/505/510/520 models.C Head Stock?

My point is that you take a basic unit with a head stock. It ONLY becomes a different model when ya add the tables.

Now with the C head stock, the only change was to change the switch hole to accept the shape of a different switch. To me that's a very minor change.

The 'original' question was "what model is this". As you correctly note the table systems determine the 'model', not the headstock. Therefore a headstock made prior to 2010 says nothing re the model being 500 or 505 . . .

I agree the B to C headstock was a minor change(albiet a good one) that also has nothing to do with 500...520.

Mark V production has not ceased (AIUI) so the Power Pro stuff that appeared after 2010 does not determine the 'model' either.

My only reason for the earlier 'comment' was that all "headstocks prior to 2010" were not model specific(500).

Choice of words.

[wa2crk]

Penn State Industries has an adaptor for the SS that converts the SS spindle to a 1" X 8TPI thread which very common on many small lathes. The number is L5818, about $17
Bill V