Drill bush DIN 179 form B, bore 4 mm, length 8 mm, outside dia 7 mm, hardened steel

This drill bush guides tools of 4 mm diameter and keeps the drilling axis in position over the full length of 8 mm. The bore follows form B of DIN 179 and is therefore rounded on both sides.

Benefits

• Bore rounded on both sides to form B, so the bush can be fitted either way round
• Overall length of 8 mm in the short version of the range short, medium and long
• Guide bore of 4 mm to DIN 179 for the matching tool
• Dimensions to DIN 179, so existing bushes can be replaced size for size
• Outside diameter of 7 mm as a ground seat in the drill plate

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.