Collar drill bushing DIN 172 form B, bore 2.8 mm, length 12 mm, collar 9 mm, hardened steel

The collar drill bushing with a 2.8 mm bore comes in the medium series at 12 mm. Its case-hardening steel at 740 ± 80 HV 10 withstands contact with the cutting edge over large batches, and the 9 mm collar fixes its position.

Benefits

• Ground guiding bore of 2.8 mm within the tolerances of DIN 172
• Press fit of 6 mm outside diameter in the holder of the jig
• All-round collar of 9 mm diameter and 2.5 mm height acting as a stop
• Guiding length of 12 mm, medium design
• Form B design of DIN 172 with the bore rounded on both sides, also for a reversed fit
• Hardened case-hardening steel at 740 ± 80 HV 10 with a ground surface

Applications

It is used wherever holes of 2.8 mm have to be produced without centre punching and without wandering, for example in jigs for series parts, in assembly gauges or in prototype work.

Standard and material

The basis is DIN 172, form B, with a guiding bore of 2.8 mm. In form B the bore is rounded on the opposite side as well. The material is case-hardening steel, hardened to 740 ± 80 HV 10 and ground afterwards.