Collar drill bushing DIN 172 form B, bore 10.8 mm, length 20 mm, collar 22 mm, hardened steel

This bushing of the medium series guides drills of 10.8 mm diameter over 20 mm. The collar with 4.0 mm height stops the bushing from being pushed down through the holder during machining and sets its height clearly.

Benefits

• Guiding length of 20 mm, medium design
• Press fit of 18 mm outside diameter in the holder of the jig
• Ground guiding bore of 10.8 mm within the tolerances of DIN 172
• Form B design of DIN 172 with the bore rounded on both sides, also for a reversed fit
• All-round collar of 22 mm diameter and 4.0 mm height acting as a stop
• Hardened case-hardening steel at 740 ± 80 HV 10 with a ground surface

Technical data

Applications

The bushing is used in drilling jigs in tool and fixture making, in series production and in repair work where holes have to be placed repeatably.

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.