Collar drill bushing DIN 172 form A, bore 0.7 mm, length 6 mm, collar 6 mm, hardened steel

This collar drill bushing guides drills and reamers of 0.7 mm diameter over an overall length of 6 mm. The 3 mm outside diameter sits in the press fit of the drill plate, while the 6 mm collar rests on the plate surface and takes up the feed force.

Benefits

• Bore 0.7 mm, ground and dimensionally accurate to DIN 172
• Overall length 6 mm in the short series
• Outside diameter 3 mm for the press fit in the drill plate
• Collar 6 mm with 2.0 mm height for axial location
• Case-hardening steel, hardened to 740 ± 80 HV 10 and ground
• Form A to DIN 172, the bore is 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 form A the bore is rounded only on the side of the collar. The material is case-hardening steel, hardened to 740 ± 80 HV 10 and ground.