3 Jaw Self Centring Chuck fits 8mm Watchmaker Lathe 2 Thread Size
Brand New 50mm diameter 3-jaw self centring chuck has reversible jaws. 
The arbor thread size you can select:
 
1.Metric Collet Holder Drawbar is: M7.0X0.75mm 
2.WW 0.275X40 Standard thread Fits 8.0mm watchmakers lathe such as Vector Brand.
 
The 
 1. metric size M7 x 0.75 Fits such as Vector and HOROTEC German brand.
 2. WW size standard American 0.275 x 40 Fits most all 8mm lathes such as:
Bergeon, Levin, Derbyshire, Boley, American Watch Tool Co., Peerless, Marshall, and most others.
 
Round runout tolerance of three-jaw chucks is: 0.03~0.05mm
 
Clamping range size is:1.0~42.0mm(Minimum~Maximum)
 
Package Includes:
1pc
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