Cylindrical drill bush DIN 179 form B, bore 6.6 mm, length 20 mm, outside dia 12 mm

Where a hole of 6.6 mm has to sit in the same place on every part, this DIN 179 bush guides the tool. The long length of 20 mm supports the drill, and the bore is rounded on both sides.

Benefits

• Guide bore of 6.6 mm to DIN 179 for the matching tool
• Bore rounded on both sides to form B, so the bush can be fitted either way round
• Outside diameter of 12 mm as a ground seat in the drill plate
• Guide length of about 3 drill diameters at 20 mm of length
• Special case-hardening steel, hardened to 740 ± 80 HV 10 and ground

Applications

• Fixed drill plates and hinged drilling jigs
• One-off and small batch production in mechanical engineering
• Drilling fitted holes on assemblies with a fixed hole position
• Inspection and marking templates in assembly

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.