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Carr Lane Adjustable-Torque Knobs

Adjustable-torque thumb screws exert positive and repeatable force. When turned clockwise, the knob disengages and rotates freely once the desired torque is reach. Turning it anti-clockwise locks the knob for a secure retraction. These can be used as a controlled-torque nut or as a thumb screw by fitting a custom screw in the tapped hole. Available in both metric and imperial sizes.

  • Thread: 1/4-20 - 1/2-13
  • Torque: 3-6 (lbs)
  • End Force: 10-125 (lbs)
  • Available in metric and imperial

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Part Number Material Number Metric or Imperial Thread Price Add to Parts List
CLM-10-ATK CLM-10-ATK Metric M10 £42.67
£51.20 Inc. VAT
CLM-8-ATK CLM-8-ATK Metric M8 £42.40
£50.88 Inc. VAT
CLM-6-ATK CLM-6-ATK Metric M6 £41.51
£49.81 Inc. VAT
CLM-12-ATK CLM-12-ATK Metric M12 £42.40
£50.88 Inc. VAT
CL-4-ATK CL-4-ATK Imperial 1/4-20 £42.67
£51.20 Inc. VAT
CL-8-ATK CL-8-ATK Imperial 1/2-13 £42.48
£50.98 Inc. VAT
CL-6-ATK CL-6-ATK Imperial 3/8-16 £42.67
£51.20 Inc. VAT
CL-5-ATK CL-5-ATK Imperial 5/16-18 £42.67
£51.20 Inc. VAT
Knurled knobs and screws datasheet

Carr Lane Adjustable-Torque Knobs

  • Thread: 1/4-20 - 1/2-13
  • Torque: 3-6 (lbs)
  • End Force: 10-125 (lbs)

Knurled knob that exerts positive, repeatable force. Clockwise, the knob declutches and turns freely when you reach the desired torque, counterclockwise, the knob locks for positive retraction. Can be used as a controlled-torque nut, or as a thumb screw by installing a custom-made screw in the tapped hole.

Operating Instructions

To set desired force, first remove the outer cover screw at the side of the knob, to expose the adjustment screw. Next, insert a hex wrench to turn the adjustment screw until desired torque is achieved. Reinstall the outer cover screw when finished. Torque can be adjusted from 3 to 6 inch-lbs, resulting in a contact force of 10 to 125 lbs, but these values are approximate. Force can vary +/- 30% depending on lubrication and other operating conditions.

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This fast-acting knob slides in and out of the clamping position, perfect for situations where complete removal of the knob is necessary for loading. To engage, tilt the knob to slide it in, then straighten to align the threads and tighten. For removal, simply loosen the knob and tilt it to slide out. Available in tapped-hole sizes ranging from #10-24 to 1/2-13 (M5 to M12 metric).

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  • Metric and Imperial sizes available
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