Collar drill bushing form B to DIN 172, bore 8 x 20 mm, collar 15 mm, case-hardening steel

This collar drill bushing guides drills and reamers of 8 mm diameter over an overall length of 20 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

• Ground guiding bore of 8 mm within the tolerances of DIN 172
• Guiding length of 20 mm, long 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
• Form B design of DIN 172 with the bore rounded on both sides, also for a reversed fit

Applications

It is typically fitted into the drill plates of jigs in mechanical engineering, contract manufacturing and mould making, where the same 8 mm hole is produced again and again in the same place.

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.