Collar drill bushing DIN 172 form A, bore 21 mm, length 20 mm, collar 34 mm, hardened steel

The collar drill bushing with a 21 mm bore comes in the short series at 20 mm. Its case-hardening steel at 740 ± 80 HV 10 withstands contact with the cutting edge over large batches, and the 34 mm collar fixes its position.

Benefits

• Form A design of DIN 172 with the bore rounded on one side, on the side of the collar
• Ground guiding bore of 21 mm within the tolerances of DIN 172
• Guiding length of 20 mm, short design
• Press fit of 30 mm outside diameter in the holder of the jig
• All-round collar of 34 mm diameter and 5.0 mm height acting as a stop
• Hardened case-hardening steel at 740 ± 80 HV 10 with a ground surface

Technical data

Applications

It suits drilling jigs, drill templates and assembly fixtures in which the tool has to be guided safely over 20 mm, even with frequent tool changes.

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.