Cylindrical drill bush DIN 179 form A, bore 4 mm, length 8 mm, outside dia 7 mm

For repeatable holes of 4 mm diameter this bush is seated in the drill plate by its ground outside diameter of 7 mm. The drill stays guided across 8 mm of length, and the bore is rounded on one side.

Benefits

• Guide bore of 4 mm to DIN 179 for the matching tool
• Overall length of 8 mm in the short version of the range short, medium and long
• Bore rounded on one side to form A, with a fixed fitting direction in the jig
• Wall thickness of 1.5 mm between the 4 mm bore and the 7 mm seat
• Special case-hardening steel, hardened to 740 ± 80 HV 10 and ground

Applications

• Drilling jigs and drill templates in series production
• Jig and tool making
• Repeatable hole patterns in sheet metal, profiles and housings
• Maintenance work where hole patterns are reworked

Standard and material

The design corresponds to DIN 179, form A. Case-hardening steel at 740 ± 80 HV 10 together with ground surfaces determines the service life of the bush.