Collar drill bushing form A to DIN 172, bore 8 x 16 mm, collar 15 mm, case-hardening steel

This collar drill bushing guides drills and reamers of 8 mm diameter over an overall length of 16 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

• Guiding length of 16 mm, medium design
• Press fit of 12 mm outside diameter in the holder of the jig
• Ground guiding bore of 8 mm within the tolerances of DIN 172
• Form A design of DIN 172 with the bore rounded on one side, on the side of the collar
• 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

Applications

It suits drilling jigs, drill templates and assembly fixtures in which the tool has to be guided safely over 16 mm, even with frequent tool changes.

Standard and material

The basis is DIN 172, form A, with a guiding bore of 8 mm. 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 afterwards.