Three Proven Methods of Verifying Torque Specifications
Once a torque specification has been determined, tools have been selected and production has begun, it is important to audit the joint for accuracy and to ensure the product has been fastened to the torque specified.
To perform this test, there are
three methods that have been established to provide an accurate reference to the applied torque.
1) First Movement Test A - Once the fastener has been tightened, employ the use of either a dial indicating wrench, dial screwdriver, digital wrench or torque testing equipment. Mark the tightened fastener and surrounding application. In the tightening direction, begin to slowly apply force to the tool until the first movement in the fastener is
noted. The reading recorded is the torque applied to the joint.
2) Loosening Test - This is a similar process to the first method described, except instead of the tightening the fastener, the operator marks and records the first movement noted in the loosening direction. The torque recorded to loosen the fastener is the approximate torque that was applied to the joint.
3) Brake-Away Movement Test B - once the operator has tightened the fastener, mark both the fastener and adjacent application for reference. This time loosen the fastener and retighten until the marks on both application and fastener are aligned. The torque required to return the fastener to its original location is the reference to the original torque applied to the fastener.
Please take a moment to check out Mountz dial wrenches, TT dial screwdrivers, digital wrenches and torque testing equipment.
The precision torque demanded for assembling surgical instruments was critical for a medical manufacturer. The TT dial measuring screwdrivers provided the solution.
E-TORC is a microprocessor controlled electronic torque wrench. The wrench enhances process reliability through complete monitoring of the fastening and assembly process with full data collection of the measured values. The efficiency and manufacturing cost-savings that the E-TORC provides, will ultimately translate into more products shipped quickly, with fewer defects.
