Not a familiar lathe in the UK or Europe, the Japanese-made Ogawa Iron Works "Precimax 1742" lathe was carried on a massive stand in cast iron, had a centre height of 8.5 inches, the ability to turn a disk up to 22 inches in diameter in the detachable gap and a capacity between centres of 40 inches.
All-geared, splash-lubricated from a sump with a sight-glass level indicator and driven by a 5.1 h.p. (3.8 kW) 3-phase 1400 r.p.m. motor mounted inside the headstock-end plinth, the 1 5/8" bore headstock spindle had eight speeds that spanned 37 to 1800 r.p.m. Although not confirmed, it is believed that the headstock spindle end fitting was an American long-nose taper in an L0 size.. Flange-mounted to the motor was a speed change gearbox with two concentrically mounted control levers, these being used in conjunction with a headstock mounted lever to give the full speed range. Drive from the gearbox output shaft to the headstock was by four "A" section V-belts, the tension easily adjusted by a handy jockey pulley.
Once running, electrical stop, start and reverse of the spindle was by the "three-rod" method, a lever pivoting from the right-hand face of the apron rotating a rod that ran for the full length of the bed and was attached, at the headstock end, to an electrical switch.
Fitted with a Norton-type quick change gearbox with a traditional tumbler-lever selector, the lathe could produce English pitches from 4 to 60 t.p.i. and, when fitted with metric transposing changewheels of 127, 35, 70 and 75 teeth, metric threads from 0.25 to 3 mm pitch could be generated. Longitudinal carriage feeds ran from 0.027" to 0.0414" inches per revolution of the headstock spindle and cross feeds (as usual on this class of machines) at half those rates.
Able to be set over for the turning of slight tapers, the tailstock had a spindle with a No.3 Morse taper and cross-fitted split-barrel lock.
The lathe illustrated was supplied complete with a taper-turning attachment, a thread-dial indicator and complete coolant equipment.