Collar drill bushing form A to DIN 172, bore 2.8 x 12 mm, collar 9 mm, case-hardening steel

With a bore of 2.8 mm and an overall length of 12 mm, this bushing keeps the tool on track inside the drilling jig. The collar of 9 mm diameter and 2.5 mm height bears on the drill plate and secures the bushing against axial slipping.

Benefits

• Overall length 12 mm in the medium series
• Outside diameter 6 mm for the press fit in the drill plate
• Bore 2.8 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 9 mm with 2.5 mm height for axial location
• Case-hardening steel, hardened to 740 ± 80 HV 10 and ground

Applications

It is typically fitted into the drill plates of jigs in mechanical engineering, contract manufacturing and mould making, where the same 2.8 mm hole is produced again and again in the same place.

Standard and material

Dimensions and tolerances follow DIN 172 in form A. In form A the bore is rounded only on the side of the collar. The bushing is made of hardened and ground case-hardening steel with a hardness of 740 ± 80 HV 10.