JB/T 10117.2-1999Parts and units of machine tool fixtures - Clamping type internal driving centres (English PDF)

1 Scope

This standard specifies holding inside draft centres of sizes 12 mm to 100 mm.

2 Normative references

The provisions contained in the following standards become provisions of this standard through reference in this standard. The editions shown were valid at the time of publication of this standard. All standards are subject to revision, and the parties using this standard should consider the possibility of applying the latest editions of the standards listed below.

GB/T 1298-1986 Specification for carbon tool steel

GB/T 1443-1996 Self-holding tapers for machine tool and tool shanks

JB/T 8044-1999 Technical requirements for the parts and units of jigs and fixtures

3 Dimensions

The dimensions are those shown in the figure and the table, in millimetres. The basic sizes d are 12, 16, 20, 25, 32, 40, 50, 63, 80 and 100 mm. The included angle of the centre point is 60 degrees and the serrations of the driving ring are at 75 degrees, shown in the developed and rotated section A-A. The overall length is 95 mm with a 45 mm head; the run-out relative to datum A is within 0,01 mm; the working faces are Ra 3,2 µm and the remaining surfaces Ra 12,5 µm.