Drill bush DIN 179 form A, medium type, bore 12 mm, length 20 mm, outside dia 18 mm

For repeatable holes of 12 mm diameter this bush is seated in the drill plate by its ground outside diameter of 18 mm. The drill stays guided across 20 mm of length, and the bore is rounded on one side.

Benefits

• Guide bore of 12 mm to DIN 179 for the matching tool
• Overall length of 20 mm in the medium version of the range short, medium and long
• Bore rounded on one side to form A, with a fixed fitting direction in the jig
• Wall thickness of 3 mm between the 12 mm bore and the 18 mm seat
• Special case-hardening steel, hardened to 740 ± 80 HV 10 and ground

Applications

• Series drilling on jigs with high piece numbers
• Drill templates for assembly work on site
• Guiding twist drills and reamers in the jig
• Repair of worn drill plates by replacement of the same size

Standard and material

Dimensions and design follow DIN 179. The material is special case-hardening steel, the hardness is 740 ± 80 HV 10, and the functional surfaces are ground.