Peter Simpson 1 | 02/01/2018 19:39:19 |
![]() 206 forum posts 9 photos | I have Boxford ME lathe and would like to fit a 6" independent four jaw chuck. I have seen several 160 mm chucks, Arc Euro have a slim body version that looks ok. The problem nobody seems to supply a back plate to suite. Is there anyway round this problem ? |
daveb | 02/01/2018 19:44:52 |
631 forum posts 14 photos | I believe Chronos stock suitable backplates. |
Oldiron | 02/01/2018 19:45:45 |
1193 forum posts 59 photos | I got a 5" backplate from Chronos which was plenty big enough to cut the register and drill threaded holes for my 6" independent 4 jaw chuck. It has the correct spindle thread ready cut. The back plate was 127.5mm OD so just check that your register is a little less than that. m Not sure if they do a 6" version but check with them. regards Edited By Oldiron on 02/01/2018 19:46:56 |
JasonB | 02/01/2018 19:46:36 |
![]() 25215 forum posts 3105 photos 1 articles | My Bison 160mm slim body is on a 5" backplate, works fine for me. ARC do 5" backplates threaded for Boxfords |
daveb | 02/01/2018 20:04:10 |
631 forum posts 14 photos | Most 4 jaw independent chuck backplates are smaller than the body diameter. With 3 jaw chucks, the backplate is (usually) the same size as the diameter. Check the specs of the chuck you intend to buy, will tell you what size you need. |
Peter Simpson 1 | 02/01/2018 20:19:08 |
![]() 206 forum posts 9 photos | Sorry school boy error. I misread the chuck dimensions. The register is 82.5 mm and the bolting PCD is 69.8 mm. It's an age thing. |
Howard Lewis | 05/01/2018 17:17:50 |
7227 forum posts 21 photos | Not a Boxford owner, but dare I suggest that the Register is actually 3.25 inches (82.5mm = 3.2480315" Assuming that a British lathe, of some vintage, was more likely to be made to Imperial dimensions? If so, a couple of thou clearance would not improve precision Howard |
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