The base on my original Emco one is 30.8mm wide by 69mm long. It mounts by means of a single capscrew 17mm from the end, with a boss 12mm diameter that engages in the recess in the cross slide.

The scale is about 25mm diameter, but is only on the far side, eg when the compound slide is set up with the handle on the right. This gives an arc of a circle that goes to plus and minus 40 degrees. There is an extra mark on the cross slide to allow greater angles to be set, but the marks on both the cross slide and the compound are wide enough that you wouldn't be using them for anything really critical.

I'll take a couple of pictures and post them shortly.

regardsd

John

Having owned both a Unimat 3 and a Sieg C0, I suspect the top slides may be identical in most significant respects.

ARC and Axminster don't seem to sell them for Sieg C0 any more, but there are a couple on the Bay for £40- odd.

I just bought one of those Clone cross slides. Yes they are almost the same as the Unimat one except that the tool mounting surface is much higher. You will need to use 4mm or 5mm square HSS tool and the 5mm will need a lot of grinding to lower the cutting edge. The 5mm will need 1mm ground off. If you use the regular Unimat size of 6mm/1/4" way too much grinding as the top will be about 2.3mm too high. The mounting screw is 3mm too short too.Apart from that, quite good. As for the Seig which they are made for, I don't have any idea about the Seig but being bigger, probably OK.

I bought one of those interchangeable tool post units too but needed to sleeve the body 7/16" x 5/16" for the centre bolt.

Edited By Ray Dean 1 on 13/07/2023 06:55:04