The main objective of this SAE Recommended Practice is to specify the recommended test methods for wheel and demountable rim attachment nuts.
This SAE Recommended Practice is written to test the wheel attachment system which includes both externally and internally threaded fasteners. Therefore, the proof load values are calculated numbers for the externally threaded member, or based on actual industry test data.
Metric values for proof load have been included in this document. In most other countries, the common units for proof load are newtons (N).
In Table 2, Test Torques and Tensions, the initial torque value A was chosen as a value just under the minimum recommended torque by SAE J267. The initial tension value B is the estimated minimum tension required to provide proper nut performance. The final tension values D are maximum values set up so as not to exceed the proof load of the externally threaded fastener.
This SAE Recommended Practice has been updated to include Static and Dynamic Torquing to facilitate different kinds of equipment.