Collar drill bushing DIN 172 form B, bore 2.4 mm, length 6 mm, collar 8 mm, hardened steel

This collar drill bushing guides drills and reamers of 2.4 mm diameter over an overall length of 6 mm. The 5 mm outside diameter fits into the drill plate, while the 8 mm collar rests on the plate surface and takes up the feed force.

Benefits

• Bore 2.4 mm, ground and dimensionally accurate to DIN 172
• Outside diameter 5 mm for a press fit in the drill plate
• Collar 8 mm with 2.0 mm height for axial location
• Form B to DIN 172 with the bore rounded on both sides, so the bushing can be used from either end
• Overall length 6 mm in the short series
• Case-hardening steel hardened to 740 ± 80 HV 10

Applications

It is used wherever holes have to be produced repeatedly in the same position, for example in fixture construction, assembly and gauge making.

Standard and material

The design complies with DIN 172 form B, in which the bore is rounded on both sides. The material is case-hardening steel, hardened to 740 ± 80 HV 10 and ground.