Drill bush DIN 179 form A, medium type, bore 11.7 mm, length 20 mm, outside dia 18 mm

During drilling in the jig this bush takes over the guidance of the 11.7 mm tool. The overall length of 20 mm sets the bearing surface of the drill in the medium version, and the bore matches form A of DIN 179.

Benefits

• Guide bore of 11.7 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 3.1 mm between the 11.7 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.