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Swiss made Simonet DZ-450, a 4″ x 18″ (102 mm x 450 mm) backgeared, screwcutting lathe. Based closely on the design of the Schaublin 102 (all accessories are interchangeable, though the spindle on the Simonet, is different at  M38 x 2.5 mm) it was fitted with a “single-lever” operated oil-bath backgear assembly equipped with hardened gears. Taking W20 collets, the hardened, ground and lapped headstock spindle ran in plain bronze bearings

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