Tailstock No. 38 On this class of lathe, as the tailstock assumes an importance almost as great as the slide rests and capstan units, Mikron went to great trouble to ensure that a suitable choice was available. The basic unit, above, was locked to the bed by a powerful cam action arm, with a permanently fitted operating lever, and carried a screw-feed barrel. Fully supported within the casting, no matter how far extended, the barrel had 80 mm of travel, was engraved with ruler calibrations and driven by a 1. 5 mm pitch feed screw that also served to automatically eject the No. 1 Morse or (similar sized) Jarno centre.

Tailstock No. 39 - an unusual "spring-actuated" type - with a horizontal lever to withdraw the spindle. This version had a reduced barrel travel of 70 mm - but the operating arm could be adjusted to a convenient operating position and an adjustable stop collar was fitted.

If a really heavy-duty tailstock was required the makers recommended the No. 40, a lever-operated model with 100 mm of barrel travel and able to carry draw-in collets of 14.5 or 16 mm bore. When fitted with a vertical lever this tailstock became the No. 41

Tailstock 42
Both No. 40 and 41 tailstocks could be fitted with a (draw-tube-held) 4-station indexing turret head (No. 90) for light repetition work and, when so equipped, were known, respectively, as the No. 42 and No. 42a. The inclined head was bored to take 18 mm tools, hand to be hand unlocked, indexed and locked through each position with a small lever provided to release the pawl.

Other "tailstocks" were more complex - and should really be described as powered drilling attachments. No. 43 (above) was a substantial unit with a 6,000 r.p.m. plain-bearing spindle moved through its 80 mm of travel by lever action and rack-and-pinion gearing. The end of the spindle was bored to accept collets up to 6 mm capacity (No. 43a) and a single 50 mm diameter by 20 mm wide pulley was fitted that, to avoid the transmission of belt pull, ran in its own ball bearings. A peg on the inside of the pulley drove the spindle.

Drilling tailstock No. 44 - an especially massive affair with its 80 mm travel spindle bored to accept 14.5 and 16mm capacity collets. A 2-step drive pulley was fitted (with cones 80 and 105 mm in diameter and 30 mm wide) running in its own ball bearings. The 3,000 r.p.m. plain-bearing spindle was moved by a 4-spoke capstan handwheel through rack-and-pinion gearing with an adjustable stop ring for repetition work.

High-speed  (2,500 r.p.m.) tapping attachment No. 45. Fitted with fast-and-loose pulleys and a very sensitive depth stop. The spindle end accepted both tap and die holders and was designed for work up to 6 mm in steel and 8 mm in brass with a maximum work length of 40 mm.

Tailstock, No. 46, with a swing-action centre, was to accompany the No. 30 pivot-polishing slide.