Rare outside its native Germany, the Rumag REVG was manufactured by Roth & Muüler GMBH Werkzeugmaschinenfabrik of 7300 Esslingen AM Neckar, a Company famous for its wide range of high-class milling machines. One of the smaller models offered, the REVG-s was a well-built machine that weighed 825 kg (1820 lbs) and was intended for general use in production, toolroom, repair shop and training institutions. Popular and long-lived (it was built from the early 1950s until at least the late 1970s) it shared many parts with the REG horizontal model and was constructed around a heavily ribbed main column and fitted with a 700 x 200 mm (27.5" x 8") table with three 14 mm T-slots (though later models had the option of an 800 mm long table). Mounted inside the base on an adjustable platform, the motor drove to the spindle either directly by V-belts or though a lathe-like backgear with hardened and ground gears submerged in an oil bath. The customer was offered a  choice of power units, either a single-speed of 1.1 kW (1.5 h.p.) running at 700, 1400 or 2800 r.p.m. or one of two 2-speed motors of 450/1400 r.p.m. or 450/2800 r.p.m. Fitted with the single-speed motors 6 speeds were provided that, with the 700 r.p.m. unit gave a range from 71 to 710 r.p.m.; with the 1400 r.p.m. type from 140 to 1400 r.p.m. and with the 2800 r.p.m. version from 280 to 2800 r.p.m. The slower 2-speed motor gave a range of twelve speeds from 45 to 1400 r.p.m. and the faster twelve from 45 to 2800 r.p.m.
Able to be swung 90° each side of vertical the head held a hardened and ground spindle running in high-grade taper roller bearings with a 74 mm (3-inch) travel, No. 3 Morse (optionally an ISA) taper quill that could be controlled by a fine-feed handwheel working through worm gearing - or by a lever and rack-and-pinion gearing for a quick-action drilling feed. However, some versions appear to have omitted the drilling action and been fitted instead with a second worm-and wheel gearing system (controlled by a small full-circle handwheel at the right-hand side of the head), to give an extra-slow rate of down-feed. The maximum clearance between spindle nose and table was 310 mm (12.25") and the throat (spindle centre line to the inside of the column) 185 mm (7.25").
With longitudinal, cross and vertical travels of 400 mm (15.75"), 150 mm (6") and 330 mm (13") respectively, the table had six rates power feed driven by a gearbox connected to the main spindle motor. Drive to the table was by the usual means of a universally-jointed and splined shaft with adjustable stops provided to automatically disengage the feed. As the spindle motor speeds varied, the feed rates too were changed accordingly, the respective rates being 6 to 63 mm/min, 12 to 125 mm/min and from 25 to 250 mm/min..