Collar drill bushing form B to DIN 172, bore 7.2 x 10 mm, collar 15 mm, case-hardening steel

This collar drill bushing guides drills and reamers of 7.2 mm diameter over an overall length of 10 mm. The 12 mm outside diameter sits in the press fit of the drill plate, while the 15 mm collar rests on the plate surface and takes up the feed force.

Benefits

• Form B design of DIN 172 with the bore rounded on both sides, also for a reversed fit
• Ground guiding bore of 7.2 mm within the tolerances of DIN 172
• Guiding length of 10 mm, short design
• Press fit of 12 mm outside diameter in the holder of the jig
• All-round collar of 15 mm diameter and 3.0 mm height acting as a stop
• Hardened case-hardening steel at 740 ± 80 HV 10 with a ground surface

Technical data

Applications

It is used wherever holes of 7.2 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

Dimensions and tolerances follow DIN 172 in form B. In form B the bore is rounded on the opposite side as well. The bushing is made of hardened and ground case-hardening steel with a hardness of 740 ± 80 HV 10.