High Load Mechlok®

Product Overview

A High Load Mechlok is a mechanical, linear locking device that combines the rod, housing, bushings, locking springs, actuation lever, and attach end into a fully integrated assembly. It consists primarily of a steel rod gripped by two locking springs that bear against specially configured holding bushings swaged into a surrounding tubular housing.

These single and dual mechanical locks have a maximum stroke setting that can lock at any position within the travel range and have positive locking capabilities in both directions. The High Load Mechlok can accommodate sizes and strokes to suit most applications up to 40 kN axial load. The High Load Mechlok has an all-steel construction and is available in a natural steel or black finish. A power spring can also provide a variable return force to return the Mechlok back to the extended position.

One end of the locking spring is positioned against the actuation lever. The other end of the locking spring is fixed. Rotation of the lever expands the locking spring inner diameter, sufficiently to allow the rod to be free to move in an infinite number of positions within the travel limit of the unit. Release of the actuation lever allows the locking springs to return to their original inner diameter to grip the rod, and lock the rod in position.

The friction between the 12.7 mm diameter rod and springs induces a gripping action. When a load is applied, the angle of the locking spring produced by the bushing increases the holding load occurring either in the compression or tension direction. The release lever is actuated by a remotely located mechanical control cable assembly or can be direct actuated.

high load mechlok
High Load Mechlok used in
Mercedes A Classe Rear Seat Spinlok
high load mechlock

Key Product Features

  • Mechanical position control
  • Infinitely adjustable
  • Frictional locking device in both linear directions
  • Up to 40 kN of axial load
  • All steel construction
  • Actuated by a remote lever
  • Low cost & low mass
  • Sizes and strokes to suit most applications
  • Finish available in black coated steel finish or natural steel
  • Applicable Patents: 5,794,470, 5,441,129, 5,219,045, 5,157,826, 5,150,771, 4,880,084, 4,577,730, 4,457,406, 4,425,987, 4,411,339, 3,874,480, and 5,568,843

Performance Characteristics

Maximum Width31 mm
Compressive Load Capacity40 kN
Tension Load Capacity40 kN
Movement at +/-175N<1.0 mm
Fatigue Life at 1800N25,000 cycles
Life Cycle Operation10,000 cycles
Release Effort25N
Sliding Friction<35n
Mass @ 550 mm Length0.9 kg

Typical Applications

  • Rear seat positioning
  • Seat recline
  • Seat tilt or height adjust
  • Steering column tilt & telescope