Collar drill bushing DIN 172 form A, bore 4.5 mm, length 8 mm, collar 11 mm, hardened steel

When drilling in jigs, this bushing keeps the 4.5 mm tool on position. The guiding length is 8 mm, the press fit measures 8 mm in diameter and the collar 11 mm.

Benefits

• Overall length 8 mm in the short series
• Outside diameter 8 mm for the press fit in the drill plate
• Bore 4.5 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 11 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 4.5 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.