Collar drill bushing DIN 172 form B, bore 7.6 mm, length 20 mm, collar 15 mm, hardened steel

The 7.6 mm bore takes up the tool and the overall length of 20 mm provides a long guide. The case-hardening steel is hardened to 740 ± 80 HV 10 and ground, so the bore stays dimensionally accurate even after many machining cycles. The collar measures 15 mm at a height of 3.0 mm.

Benefits

• Bore 7.6 mm, ground and dimensionally accurate to DIN 172
• Overall length 20 mm in the long series
• Outside diameter 12 mm for a press fit in the drill plate
• Collar 15 mm with 3.0 mm height for axial location
• Case-hardening steel hardened to 740 ± 80 HV 10
• Form B to DIN 172 with the bore rounded on both sides, so the bushing can be used from either end

Applications

The bushing is used in drilling jigs in tool and fixture making, in series production and in repair work where holes have to be placed repeatably.

Standard and material

The design complies with DIN 172 form B, in which the bore is rounded on both sides. The material is case-hardening steel, hardened to 740 ± 80 HV 10 and ground.