The Shop > Tools
Chuck backplate with 1" 8tpi thread?
edward:
I am in the process of refurbing my Drummond B.S lathe. One thing it is lacking is a 4-jaw chuck. I have a couple of 4-jaws with either no or incorrect backplates.
So I am after a suitable backplate - the nose thread is 1" 8tpi, which appears to be non-standard but the machine I suspect does have a bit of a bastard history as I dont't think the headstock I have matched the bed for a start! I have measured it several times as the thread seems at odds with what the 'usual sources' say it should be, and I am pretty certain it is 8tpi.
The faceplate it came with is a steel disk with a 1"8 nut welded to the back - not too keen on that as a soultion for the backplate!:)
I would prefer a pre-machined thread if at all possible, although I guess I could buy a blank and a suitable tap - although I am not convinced winding in that big a tap is a good idea. Any idea where I might purchase a suitable article?
John Stevenson:
Early Myford, ML1 TO ML4 were 1" x 8 tpi to the best of my knowledge, as was the ML8 wood working lathe
vtsteam:
Atlas and Sears 6" metal lathes used it -- I believe my Atlas Horizontal mill did also. It's a common size for wood lathe spindles, and you can easily find new wood lathe faceplates here that might be converted to backplates. Taps, too. Also the occasional chuck for above metal lathes. Check Ebay for "1x8 tpi".
vtsteam:
Here's one, but not local to you:
http://www.shars.com/products/view/20324/_4_18_Threaded_Back_Plates
edward:
nothing is ever simple....
The wood lathe and early myfords were apparently 1"12tpi. Having just spoken to tony at lathes.co.uk, looks like I may have a re-made spindle here.
Hmmm....
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