TLS Preset Torque Screwdrivers

TLS is a preset torque limiting screwdriver (internally adjustable). The torque screwdriver is built with a cam-over design that prevents a fastener or bolt from being over-tightened. When the torque screwdriver reaches the preset torque value, the internal mechanism disengages from the drive, thus limiting the torque applied. Using a quality torque screwdriver ensures that proper torque is applied and maintains requirements associated with ISO quality standards.


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Class 100 Clean Room models available
  • Preset torque limiting screwdriver (internally adjustable).
  • Thrust bearings insure that the torque setting is independent of any end load applied by the operator.
  • Tamper-proof internal adjustment. No external adjustment scale - must be preset using a torque analyzer.
  • Precision radial ball clutch "slips-free" when the preset torque is reached preventing over-torquing.
  • Bi-directional operation and is calibrated in either the CW or CCW direction.

The preferred and certified ranges of these tools is in accordance with the requirements of ISO 6789 (+/- 6% of indicated setting).