What machine are they from?

[Staffordshirechina]

I got these centres with a load of other stuff but they don't appear to be part of the set for the machine I bought.
Does anybody recognise them please??

They have a flat base and single hold down bolt hole.

Height from base to centreline seems to be 4 + 11/32nd inches. (my J & S machine is 4").
The square ends have a reamed 1/2" hole with grub screw in them.
There are no obvious markings or numbers anywhere on them.

Thanks.
Les

[lancelot]

Hello Les,
Is it just possible that they may be part of a Tool Room Standards bench testing set up,for checking parallellism of machined parts?
All the best for now,
John.

[ChrisCrosskey]

They could be Clarkson centres from one of their tool and cutter grinders. I base this on the fact that they're nearly exactly twice the size of the ones for my Stent and a Stent is basically a 6" scale version of a Clarkson Mk1...... In fact they are so similar I thought they were Stent until I read the centre height......

chrisc