Cylindrical drill bushes, DIN 179
Drill bushes
Cylindrical drill bushes to DIN 179 guide drills and reamers in drilling jigs, templates and gauges. This category holds 1152 versions with bore diameters from 2.2 to 36 mm, lengths from 8 to 56 mm and outside diameters from 5 to 55 mm, all in hardened steel.
Selection follows the bore diameter, the outside diameter of the seat and the body length, which is listed as short, medium or long. The bore is supplied as form A, rounded on one side, or form B, rounded on both sides.
Drill bushes of this type are pressed into drilling jigs in tool and jig making. They hold the cutting tool in a fixed position during series drilling and limit bore wander. Form B, rounded on both sides, is chosen when the bush is fitted either way round or approached from both faces.


