Brown & Sharpe 00 collet set in their door-mounted storage rack
Balas Collet for the Mk. 2 and Mk. 3
On Mk. 2 and Mk. 3 models a Newhall-Balas "Type C6" was provided as standard. Like the collets for the Mk. 1 these were still pushed in on their nose, were tapered for their full length and had to be removed with a special extractor. In the manual for the Mk. 2 a specific instruction was given for including a needle-roller thrust bearing and washer in the collet nosepiece assembly, although this was omitted on the Mk. 3.
Table feed screw metric micrometer dial Mk. 3
Cross-feed detail Mk. 3 showing the adjustable stops and built-in ruler
Detail showing quill feed engagement lever and knock-off arrangement