What is the torque range for hand-tightening screws?
1 Answers
The maximum torque range for a normal human hand is 60N—120N. Below are the extensions for using a wrench torque: 1. Select an appropriate range: When using a torque wrench, first select a torque wrench with a suitable range based on the requirements of the workpiece being measured. The measured torque value should not be less than 20% of the wrench's range during use. A too-large range is not suitable for reinforcing small torque components, and a small-range torque wrench should never exceed its range. 2. Pre-use inspection: Before using the torque wrench, first connect the square drive of the wrench to the auxiliary accessories to ensure the connection is secure. Before applying torque, set the required force value and lock the tightening device. Adjust the direction switch to the tightening direction, then quickly operate the wrench 5-6 times in succession to allow the special lubricant inside the wrench components to fully lubricate, ensuring the torque wrench is more accurate and durable. 3. Control the range: During measurement, hold the handle within its effective range and apply force slowly in the direction perpendicular to the torque wrench's housing until you hear a "click" sound from the torque wrench. This indicates that the torque wrench has reached the preset torque value, and the workpiece has been adequately tightened. Immediately release the force afterward to avoid damaging other components.
