Very often when turning it is necessary to make frequent horizontal adjustments to the toolrest whilst maintaining the same height. For this an extremely useful time-saver is a depth collar fitted to the toolrest stem.
However, for my Nova DVR lathe with a 1" diameter toolrest stem the cost of such a collar is £36 (plus carriage) which is extortionate
Time to shop around online and, after some careful searching I came up with these UK suppliers which may be useful to others wanting to do the same thing.
Bearings R Us (Huddersfield Bearings) offered exactly what I needed (
SEE HERE) at a cost of £3.06 plus £1.50 carriage. I ordered from them and you can judge from the photographs that the collars are excellent and use a grub screw (with Allen key - not supplied) for attachment to the stem.
There are 41 collar sizes to choose from ranging from 4mm - 80 mm inside diameter (Metric and imperial measurements included - see full range
HERE)
Another company is
Bearing Boys which I haven't tried but which appear to be even cheaper with a 1" collar costing £2.98 including carriage.
Hope this is useful
Tim