Cylindrical drill bush DIN 179 form B, bore 11.5 mm, length 12 mm, outside dia 18 mm, ground

During drilling in the jig this bush takes over the guidance of the 11.5 mm tool. The overall length of 12 mm sets the bearing surface of the drill in the short version, and the bore matches form B of DIN 179.

Benefits

• Bore rounded on both sides to form B, so the bush can be fitted either way round
• Guide bore of 11.5 mm to DIN 179 for the matching tool
• Special case-hardening steel, hardened to 740 ± 80 HV 10 and ground
• Outside diameter of 18 mm as a ground seat in the drill plate
• Guide length of about 1 drill diameters at 12 mm of length

Applications

• Series drilling on jigs with high piece numbers
• Drill templates for assembly work on site
• Guiding twist drills and reamers in the jig
• Repair of worn drill plates by replacement of the same size

Standard and material

The basis is DIN 179 for cylindrical drill bushes. Form B means a bore that is rounded on both sides. Made of special case-hardening steel, hardened to 740 ± 80 HV 10 and ground.