Collar drill bushing form A to DIN 172, bore 39 x 56 mm, collar 59 mm, case-hardening steel

This bushing of the medium series guides drills of 39 mm diameter over 56 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 56 mm in the medium series
• Outside diameter 55 mm for the press fit in the drill plate
• Bore 39 mm, ground and dimensionally accurate to DIN 172
• Form A to DIN 172, the bore is rounded on the collar side so the tool enters easily
• Collar 59 mm with 5.0 mm height for axial location
• Case-hardening steel, hardened to 740 ± 80 HV 10 and ground

Technical data

Applications

It is typically fitted into the drill plates of jigs in mechanical engineering, contract manufacturing and mould making, where the same 39 mm hole is produced again and again in the same place.

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.