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A new series of ISO class 5 rectangular ground racks and joining gauges are available from Sterling Instrument in Modules 0.5, 0.8, 1, 1.5, and CP 2 and 5. Gear racks are used to convert rotational motion into linear motion. In theory, a rack is an unrolled gear with an infinite pitch diameter. A rack will mesh with all gears of the same pitch.

The Module 0.5, 0.8,1 and 1.5, are identified as the
S18C -- M series and the CP 2 and CP 5 are known as the S18CCPM series. Both series are available with machined ends that allow them to be joined together to create continuous lengths of rack. The spacing of these mating racks is achieved by the use of the new joining gauge. The joining gauge is a section of rack that is bridged over the two adjoining racks for precise alignment while attaching the rack to your application.

These standard components are made from ANSI 1045 steel with a tooth surface induction hardness of HRC 27-32. Stock racks are available in lengths of 200 to 300 mm, and from 64 to 128 teeth. There is also a family of round racks available in module 0.5, 0.75, 0.8 and 1 in ISO class 9 in 304 stainless steel. They are identified as the S181YYM Series and are offered in lengths of
202 mm and 305 mm.

Additional technical details are contained in
Catalog D785, available free upon request from
Sterling Instrument

SI 33