Manufactured by an unknown Spanish machine-tool company, the robust looking TG-600-M, TG-750-M-A-65 and TG-800-M lathes were advertised in Europe by "Fabricantes Asociados de Maquinas Herramientas S.A." - a limited company set up by a group of Spanish makers to handle their export sales.
Years of manufacture and technical details are sketchy, but as the bed had a V-way with its outer surface made much wider and set at a shallower angle than the (narrower and steeper) inner, they are likely to have been from the 1950s to the early 1970s. Differing only in their between-centres capacity (the TG-600-M had 600 mm and the TG-750-M-A-65 700 mm) their centre height of 165 mm gave them a similar capacity to the contemporary geared-head Colchester Student and Master. However, the Spanish machines were belt-driven, with a conventional (single-lever operated) backgear assembly, and would have lacked the ultimate metal-removing capacity of the English (or indeed other, similar models). Driven by a 1.5 h.p. motor (3 h.p. on the Student) mounted at the back of the headstock, twelve spindle speeds were provided of 50, 80, 95, 140, 170 and 240 r.p.m. in backgear and 270, 415, 465, 740, 810 and 1300 in direct belt drive. Bored through 23 mm the spindle nose carried a No. 3 Morse taper and a D1-3" nose, though this may have been to the customer's choice and included an American long-nose taper in an L00 fitting.
A full screwcutting and feeds gearbox of the quick-change Norton pattern was fitted with power feeds taken through a separate power shaft to the apron.
Of conventional arrangement, the compound slide rest had a cross slide formed with a very small T-slotted section at the rear and a top slide, that could be swivelled through 360°, fitted as stadard with an indexing 4-way toolpost. Micrometer dials were rather small and the feed0-screw handles of the traditional "balanced" type.
A lack of concern for the operator was evident in the arrangement of the tailstock, this being locked to the bed by the use of a loose, self-hiding spanner instead of an eccentric cross shaft and captive handle.
Mounted on a good cast-iron stand the TG-600 weighed approximated 500 kg and the TG-750 515 kg.
Of very similar layout and specification to the other two models (though with a different design of apron), the 800 mm-between centres TG-800-M had the same 165 mm centre height but sixteen instead of 16 speeds; these ran from 50 through 75, 90, 110, 125, 160, 180 and 250 r.p.m. in backgear and from 265, 400, 415, 565, 635, 810, 900 to 1300 r.p.m. in direct belt drive.
Supplied as standard equipment with all models were fixed and travelling steadies, a drive plate, coolant equipment (the pump driven from an extension to the main motor spindle), a thread-dial indicator, 4-way toolpost, a set of gears to extend the gearbox threading range and the necessary spanners
If any reader has one of these lathes, or other machines that might have been made by the same Company, the writer would be interested to hear from you.
Si algún lector tiene uno de estos tornos, el escritor estaría interesado en saber de usted.