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Tour à Métaux S.A.M.O.A
A Lathe by the French Company S.A.M.O.A.

S.A.M.O.A. Société des Machines Outils et Accessoires (Machine Tools and Accessories Company) are known to have built a number of lathes, but are these rare, even in their native land.
Shown below is a 125 x 800 mm under-driven S.A.M.O.A. lathe from what would almost certainly have been the 1950s. Of conventional layout and weighing between 400 and 500 kg, the lathe was heavily built and carried on a massive, all-cast-iron stand. Running in antifriction bearings, the 20 mm bore spindle carried a 4-step V-pulley with drive coming from a belt-drive countershaft (that used needle roller bearings) held within the headstock-end plinth. A total of 16 speeds was available, these being produced by a motor fitted with a 2-step pulley (to give high and low speed ranges) the 4-step headstock drive and backgear - the range likely to have been - from an estimate of the various pulley diameters -  a useful span from 25 to 1500 r.p.m.
Screwcutting was by changewheels, the drive passing through a conventional tumble-reverse assembly to drive a leadscrew and a separate shaft (which looks to have had an automatic knock-off stop fitted) to provide sliding and surfacing feeds.
Should any reader be able to provide further information, the author would be pleased to hear from you. Si un lecteur est en mesure de fournir des informations supplémentaires, l'auteur serait heureux d'avoir de vos nouvelles.

Countershaft main pulley with the 2-step drive from the motor and 4-step to the headstock spindle