Gamma ROBOTTry It!

---

The production of slide rules was started in 1949 at Gamma Works. They planned two general-purpose models and some special slide rules for solving common problems in specific professions. The Robot machining slide rule looks like a normal 25 cm (10-inch) rule, but its precision is equivalent as a pocket slide rule with scale length is 12.5 cm (5-inch).

This type of slide rule was specially designed for metal-cutting purposes. Instead of ordinary scales it has special logarithmic scales for setting/reading cutting speed or rpm (v,n), diameter or length (d,h), floor-to-floor time (t), or feed (e). For more common calculations with logarithms, sine and tangent, it has these scales on the back of the slide and the common A-scale on the front for reading the function values. The window has five special indices to easily calculate weights of some materials (V - steel, Al - aluminium, R - copper) with square-, circle-, or hexagonal cross-section. The rules was supplied with more detailed printed manual to help the workers.

• Brief history of Gamma slide rules
• Slide rules in Hungary