Collar drill bushing form B to DIN 172, bore 20.5 x 20 mm, collar 34 mm, case-hardening steel

This bushing of the short series guides drills of 20.5 mm diameter over 20 mm. The collar with 5.0 mm height stops the bushing from being pushed down through the holder during machining and sets its height clearly.

Benefits

• Overall length 20 mm in the short series
• Outside diameter 30 mm for the press fit in the drill plate
• Bore 20.5 mm, ground and dimensionally accurate to DIN 172
• Form B to DIN 172, the bore is rounded on both sides and can be loaded from either end
• Collar 34 mm with 5.0 mm height for axial location
• Case-hardening steel, hardened to 740 ± 80 HV 10 and ground

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.