JB/T 53578-1999KQJ down-the-hole drills - Product quality grading (English PDF)

1 Scope

This standard specifies the quality grades, test methods and inspection rules for KQJ-80 and KQJ-100 down-the-hole drills. It applies to the assessment of the quality grade of KQJ-80 and KQJ-100 down-the-hole drills.

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 1958-1980 Inspection of geometrical tolerances

GB/T 3177-1997 Inspection of the dimensions of plain workpieces

GB/T 3768-1996 Acoustics - Determination of sound power levels of noise sources using sound pressure - Survey method using an enveloping measurement surface over a reflecting plane

GB/T 6060.2-1985 Roughness comparison specimens - Surfaces produced by grinding, turning, boring, milling, slotting and planing

GB/T 8923-1988 Rust grades and preparation grades of steel surfaces before the application of paints

GB/T 10095-1988 Accuracy of involute cylindrical gears

3 Quality grades

4 Reliability and service life

5 Compatibility with matching equipment

6 Safety and hygiene