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Lathe Spindle Nose & Backplate Fittings
We can supply parts & accessories for machine tools of all kinds: cross-feed screws and nuts, T-slotted cross slides, backplates, gears of kinds, parts repaired, etc. one-off items a speciality. email your needs
Backplates and chucks can be supplied in most of these fittings
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The well-known "cam-lock" spindle fitting

For many years chucks, faceplates and catchplates were simply screwed onto the end of the lathe's spindle; a bewildering variety of types and sizes of thread were used and non were standardised between manufactures. Although cheap to manufacture and perfectly adequate for most purposes, especially amateur use, threads do have serious limitations centred around safety, rigidity and ease of removal and replacement. To take just one example: a threaded fitting cannot safely be run backwards and, whilst a chuck might happily stay in place as a lathe accelerates up to top speed in reverse, once there it cannot be so easily stopped. Legion are the number of serious accidents caused where an operator has stated a lathe in reverse, realised his mistake, and then (without thinking) applied the spindle brake. Once the chuck starts to unscrew the workman can do nothing but watch in horror as the 200 lb mass, rotating at 800 rpm, accelerates down the length of the workshop smashing machines and people unfortunate enough to get in its way.
To overcome this, and other limitations of threaded fittings, many alternative designs have appeared over the years that are safer, more rigid and both easily mounted and removed.: the following pages illustrate the most popular and frequently encountered types for both direct and  backplate mounting. To understand the fitting look through the links to both Spindle Nose Fittings and Backplate Fittings.

American long Taper with Drive Key and Draw-nut Types L00, L0, L1, L2 and L3
American short Taper with Bolt or Stud Fixing Types A1, A2, B1 and B2
American short Taper with Camlock Fitting Type D1
British and ISO Standard Spindle Noses - Direct Mounting
British & ISO Short Taper with Bolt or Stud Fixing
British & ISO Short Taper with Camlock Fixing
British & ISO short Taper with Bayonet Ring Fixing

German Standard Spindle Noses

Cam-lock D1-2", D1-4" etc
American Long Taper L Types L00, L1, L2 and L3
Short Taper A-1, A-2, B-1, B-2, with Bayonet
"A Type" Screw Fitting

CLICK HERE FOR A PDF of Spindle Nose Fittings