need info on 1020 rivette lathe

First off -- I'm not sure that you have the lathe maker's name spelled correctly. That could impact your ability to find it in a search on eBay. (Of course -- eBay vendors spell things strangely too, so you might hit on one who spells it the same as you. :-)

Now as for the three shafts -- at least what I believe that they

*could* be, with no experience with a Rivett lathe. (Or however it really *should* be spelled. :-)

Shaft 1: Leadscrew, as you observed.

Shaft 2: Power feed (distinct from leadscrew to reduce wear on the leadscrew.) This *could* be the octagonal shaft, or it could be a round one, with a keyway running its length. That keyway might happen to be facing towards the bed at the moment, and thus not be visible.

Shaft 3: A remoting of the spindle power switch. I have seen this on a Taiwanese lathe, and it was presumably copied from some other lathe. The shaft passes through the carriage apron, and through a lever on the side of the apron.

When the lever is pushed down or pulled up, it rotates the shaft to closes switch contacts to select forward or reverse spindle rotation. In the middle, it is stopped.

This allows you to halt the lathe even if you are working near the tailstock and the bed is quite long. This one might be the octagonal shaft -- or it might be the round one with a keyway on some non-visible surface as in the above description for Shaft 2.

Good Luck, DoN.

First off -- I'm not sure that you have the lathe maker's name spelled correctly. That could impact your ability to find it in a search on eBay. (Of course -- eBay vendors spell things strangely too, so you might hit on one who spells it the same as you. :-)

Now as for the three shafts -- at least what I believe that they *could* be, with no experience with a Rivett lathe. (Or however it really *should* be spelled. :-)

A Rivett (pronounced Riv-ette, although not spelled that way) is a Monarch 10EE "work alike".

The three shafts on the 1020S have the same functions as on the 10EE.

The Octagonal shaft you refer to is actually a splined shaft. I guess in photos it does look octagonal. As Don surmised, it is the feedscrew.

Regards, Dave

so one is the lead screw two is engaging the lead screw three is for feed. why does some of the rivett not have this 3rd shaft. i guess it is needed

why does some of the rivett not have this 3rd shaft. i guess it is needed

The third (bottom) shaft is implemented on most toolroom lathes of the Monarch

10EE type (including the English CVA and the Rivett 1020S) only if the electric leadscrew reverse (ELR) accessory is also fitted.

With this accessory fitted, the normal headstock FWD/OFF/REV drum switch is absent, and spindle direction is managed by a combination of tailstock controls, and carriage controls.

The third shaft terminates in the tailstock ELR box, where there are a number of microswitches which perform the same function as the headstock drum switch.

The carriage slids along the ways, and the apron always engages the third shaft.

A lever on the apron transmits the operator commands to the ELR box.

This accessory improves the performance of some production operations, most notably threading.