Collar drill bushing DIN 172 form A, bore 3.2 mm, length 12 mm, collar 9 mm, hardened steel

The 3.2 mm bore takes up the tool and the overall length of 12 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 9 mm at a height of 2.5 mm.

Benefits

• Bore 3.2 mm, ground and dimensionally accurate to DIN 172
• Overall length 12 mm in the medium series
• Outside diameter 6 mm for a press fit in the drill plate
• Collar 9 mm with 2.5 mm height for axial location
• Case-hardening steel hardened to 740 ± 80 HV 10
• Form A to DIN 172 with the bore rounded on the collar side, so the tool enters easily

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 A, in which the bore is rounded only on the collar side. The material is case-hardening steel, hardened to 740 ± 80 HV 10 and ground.