Dividing head for Tom Senior Mill advice

[old martParticipant @oldmart]

I measured the height of the 6" RT with a 5" Pratt Burnerd chuck and the 6" lightweight independent, and forgot to bring the figures home with me. I believe the PB was 142mm to the end of the jaws, the independent would be about 5mm less. With hindsight, I would have gone for the 3 tee slot top rather than the 4 slot, because it would be easy to fit a three jaw scroll with front mounts which gets used more often on the RT. To hold the 3 jaw scroll on the top, I drilled and tapped 3 mounting holes in 8mm with just enough clearance in the chuck holes to get the chuck on centre before tightening them. For quick centring to +- 0.001" I just stick a test bar down the MT2 centre bore and gently clamp the jaws on it.

[Author]

Posts