George Adams D, E, F, G & H Lathes


	email: t ony@lathes.co.uk Home Machine Tool Archive Machine-tools Sal e & Wanted Machine Tool Manuals Catalogues Belts Books Accessories George Adams of London 3.25" & 4.75" Models D, E, F, G & H Precision Plain Lathes for Instrument makers George Adams Home Page GA Lathe Model 2 1/2 " G.A. Watchmakers' Lathes G.A. Round Bed Lathe 3.25" & 4.75" Screwcutting Lathes Models D, E, F, G & H 4" & 5.25" 4" & 5.25" Screwcutting Models A, B, L, KF1 and CL 3.25" & 4.75" Precision Lathes Models D, E, F, G & H 2.75" Screwcutting Lathe Model CS Advertisements 1930 GA 21/2" Precision Plain Lathe Watchmakers' Lathes Portass-built Mk. 5 Lathe Photo Essay George Adams Ehrlich Lathe

Non-backgeared Model D, E, F, G and H Plain Lathe with straight bed. This machine could be fitted to either as single or double flywheel foot-power (treadle) stand.

	Backgeared version of the D, E, F, G and H lathe headstock.

	Backgeared, gap-bed version of the D, E, F, G and H lathe - the backgear covers are shown removed. The gap was filled by a bridge piece - not shown.

Screwcutting attachment on the Model D lathe. This accessory, though common on similar lathes from many makers, carried two features possibly unique to George Adams: a cluster gear which could be set to produce left and right hand threads with a neutral, non-drive position and an alternative location for the end of the telescopic drive shaft that allowed it to drive, via a pair of bevel gears, a power cross feed mechanism.
With the 14 changewheels supplied a range of both English and metric threads could be generated. At a cost of £13 : 10s : 0d in 1931 this accessory represented some 66% of the cost of the cheapest 3.25" Model D Precision Lathe - and some 56% of the cost of the most expensive long bed 4.75" version.

Distinctive fixed steady of the George Adams 3.25" and 4.75" lathes

	Thread Chasing Attachment For the 3.25" & 4.75" Models D, E, F, G & H This type appears to use the mounting points normally provided on a headstock for the fitting of backgear.

	Sturdy, bed-mounted vertical milling attachment for the 3.25" & 4.75" Models D, E, F, G & H

	Vertical slides showing the optional vice and high-speed milling and drilling spindle for use on the 3.25" & 4.75" Models D, E, F, G & H

Bed-mount saw-bench assembly

George Adams GA 31/2
Built very much along the lines of the GA 21/2, the GA 31/2 Precision lathe had an increased centre height, stiffer tailstock, much heavier compound slide rest (with a 5.5" travel top slide) and the option of flat instead of round-belt drive. The machine was built in just one version - with a centre height of 3.5" and a bed 32" long which gave a capacity of 18" between centres.
The 9/16" bore headstock spindle, with a 1.25" x 10 t.p.i nose, accepted GA 15 mm shank Size C collets (with a maximum bore of 3/8") and was hardened and ground - and ran in hardened, ground and lapped steel bearings.
Both headstock and tailstock accepted the same half-length No. 1 Morse taper centres as used on the GA 21/2 lathe. The bed was formed with one raised V and one flat - the same V locating both the slide rest and the tailstock.


	George Adams Home Page GA Lathe Model 21/2" G.A. Watchmakers' Lathes G.A. Round Bed Lathe 3.25" & 4.75" Screwcutting Lathes Models D, E, F, G & H 4" & 5.25" 4" & 5.25" Screwcutting Models A, B, L, KF1 and CL 3.25" & 4.75" Precision Lathes Models D, E, F, G & H 2.75" Screwcutting Lathe Model CS Advertisements 1930 GA 21/2" Precision Plain Lathe Watchmakers' Lathes Portass-built Mk. 5 Lathe Photo Essay George Adams Ehrlich Lathe George Adams of London 3.25" & 4.75" Models D, E, F, G & H Precision Plain Lathes for Instrument makers email: t ony@lathes.co.uk Home Machine Tool Archive Machine-tools Sal e & Wanted Machine Tool Manuals Catalogues Belts Books Accessories