JB/T 10117.3-1999Parts and units of machine tool fixtures - External driving centres (English PDF)

1 Scope

This standard specifies outside draft centres with Morse tapers No. 2 to No. 6.

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 shank is a Morse taper with a surface roughness of Ra 0,8 micrometres. The driving ring carries serrations at 75 degrees with a 15 degree rake, shown in the developed section A-A; the head diameter is D, the bore d and the overall length L. The end face is Ra 6,3 micrometres and the remaining surfaces Ra 12,5 micrometres.