Drill bush DIN 179 form A, medium type, bore 4.3 mm, length 12 mm, outside dia 8 mm

During drilling in the jig this bush takes over the guidance of the 4.3 mm tool. The overall length of 12 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 4.3 mm to DIN 179 for the matching tool
• Outside diameter of 8 mm as a ground seat in the drill plate
• Bore rounded on one side to form A, with a fixed fitting direction in the jig
• Special case-hardening steel, hardened to 740 ± 80 HV 10 and ground

Applications

• Fixed drill plates and hinged drilling jigs
• One-off and small batch production in mechanical engineering
• Drilling fitted holes on assemblies with a fixed hole position
• Inspection and marking templates in assembly

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.