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Derbyshire - WW Lathes
Cross-sectional Drawings
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An American Watch Tools Company drawing from about 1890 showing a section through the headstock of an early WW lathe. The unit consisted of the main "frame", a Spindle, a Rear Adjusting Bearing, a Bearing Adjusting Nut and the Headstock Bearings themselves. All the bearing surface were hardened, ground and finally lapped to a perfection of fit.
The Headstock Bearings were pressed into bored and honed holes in the casting - the Front Bearing having the same angles of 3 and 45 degrees as the Spindle Nose. The Rear Adjusting Bearing was a sliding fit on the spindle - and kept from turning by a key pin; its two angles of  3 and 45 degrees matching the angles formed on the "inner" Headstock Bearing. The single Adjusting Nut screwed onto a very fine thread on the end of the spindle.
Like many other makes of watchmaker's lathe, close-fitting dust caps were snapped onto flanges at each side of both bearings.

A drawing from 1950 of the headstock fitted to the Magnus lathe - with the same 50mm centre height as a standard WW, but with a collet capacity of 0.3125"  (5/16" - or 80 metric) compared to the 0.1969" (50 metric) of the original.
The assembly was essentially the same as the one above but the headstock frame was more massive with a greater thickness of material around the bearings. On this model dust caps were fitted to the outside of each bearing - but not to the inside faces.

Combination Tailstock with patented rack-feed barrel. The patent (No. 1,168,063) was applied for on June 4, 1913 and granted on January 11, 1916.

End section through the Combination Tailstock.

A later partially cut-away drawing of the Combination Tailstock.

End elevation of the Combination Tailstock.

Below: the improved slide rest assembly with an easily-adjusted tool holder

E-MAIL tony@lathes.co.uk
Home   Machine Tool Archive   Machine Tools For Sale & Wanted
Machine Tool Manuals   Machine Tool Catalogues   Belts

Derbyshire - WW Lathes
Cross-sectional Drawings
Home Page    Webster-Whitcomb & Large Lathes    Magnus Lathe    Elect Lathe   
Model 750    Model A    Accessories    Micromill   Precision Drill    Tailstocks
Sectional Drawings