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Boxford Backplate Problem

Backplate will not fully mount onto the spindle

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Clive Brown 1	10/11/2020 18:11:59
1050 forum posts 56 photos	That's not a Boxford spindle fitting. The Boxford is 1.5" x 8 tpi with a 1.5" dia. register.
Brian Wood	10/11/2020 18:28:49
2742 forum posts 39 photos	I agree with Oldiron, there are discrepancies The dividing head looks identical to a Vertex if that is helpful Brian
old mart	10/11/2020 20:02:31
4655 forum posts 304 photos	Unfortunately, I don't think there is enough difference in the threads to modify your Boxford plate. I have turned Boxford backplates into Smart & Brown ones, but thats going from 1 1/2" to 1 3/4". What is the thread pitch? Edited By old mart on 10/11/2020 20:05:52
Bazyle	10/11/2020 22:36:54
6956 forum posts 229 photos	Although there are some BS0 type dividing heads specifically made with a Myford nose that is becasue they knew there was a large amateur market to sell them into who would see the compatible thread as an incentive to buy it rather than something for which they needed new chucks etc. However the Boxford market was mostly schools who didn't care that it cost extra for different chucks so the manufacturers took the normal industrial route of tying the purchaser to their everpriced accessories. Hence a Boxford spindle nose is unlikely.
Dave Halford	11/11/2020 11:33:25
2536 forum posts 24 photos	Just had a look at my BS0 and it seems that they are only generic ish The thread is 1.2" , the 'register' is the same as the thread height so the backplate seats against the fixed dividing plate.

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