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Mechlok Product Description

Tubular Mechlok A Mechlok® is a mechanical, linear locking device that combines the rod, housing, bushings, locking springs, actuation lever, and attach ends into a fully integrated assembly (or clamshell construction). 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 (or has two halves of the clamshell housing welded to the bushings to create a finished assembly).


Clamshell Mechlok These single mechanical locks have one maximum stroke setting that can lock at any position within the travel range and have positive locking capabilities in both directions. There are many sizes and strokes to suit all applications up to 2,000 lbs [8,896 N] axial load. The Mechlok is all-steel construction and available in a variety of finishes.


A compression spring can also provide a variable return force to return the lock back to the fully extended position.


Typical Applications

  • Seat recline for automotive, train, van, truck, bus, and office furniture
  • Steering column fit
  • Ergonomic adjustment for wheelchairs, office furniture, and exercise equipment
  • Arm rest angle adjustment for automotive, truck, and office furniture


Features and Benefits

  • Linear Positioning mechanical lock
  • Stroke is infinitely adjustable
  • All steel construction
  • Up to 2,000 lbs [8,896 N] of axial load capability
  • Positive locking in both directions
  • Friction device
  • Actuated by a lever, button control or a direct mounted spindle
  • Low cost
  • Sizes and strokes to suit most applications
  • Available in oxide coated or plated finishes
  • Commonly used in applications where unit is visible.


Principle of Operation

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 range 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 rod and the springs induces a gripping action. When a load is applied, the angle of the locking spring produced by the bushing increases the holding load similar to a series of cocked washers. This can occur in either direction.


The unit is actuated either by direct actuation with a spindle or by a remote located mechanical control cable assembly that is attached to the actuation lever.