AS 2710-1984

Sets out methods for measuring the dimensional features of gauges for screw threads of vee-form. Deals with gauges for single and multiple start, symmetric screw threads, with included angles of 47.5 degrees, 55 degrees, or 60 degrees. Provides information on terms and definitions used in the measurement of screw threads and basic information on the types of equipment to be used in the measurement of screw thread gauges.

This standard sets out methods for measuring the dimensional features of gauges for screw threads of vee-form. It deals with gauges for single and multiple start, symmetric screw threads, with 47.5, 55, or 60-degree included angles. The standard provides information on terms and definitions used in the measurement of screw threads and provides basic information on the types of equipment to be used in the measurement of screw thread gauges.NOTES:1. The methods of measurement and measuring equipment set out in this standard do not preclude the use of other methods and/or equipment, provided that it can be demonstrated that the use of such methods and/or equipment will achieve results of measurements having accuracies at least equal to those given.2. It is not possible to specify in this standard precise details of the equipment to be used, the essential requirements being that the equipment is capable of measuring the gauges in the manner prescribed in Section 3 and to an accuracy commensurate with the gauge tolerances.3. The tolerances on screw check gauges and screw setting gauges are relatively very small and therefore the condition and accuracy of the measuring equipment must be of a very high order, and the equipment must be calibrated more frequently. In particular attention is directed to the tolerance on pitch for such gauges; equipment used for checking the pitch of these gauges must be capable of measuring pitch to an accuracy of the order of 0.5 mm between two adjacent threads and within 2.5 mm over a 50 mm length of thread.