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  • Railway passenger car brake slack adjuster
  • Railway passenger car brake slack adjuster
  • Railway passenger car brake slack adjuster
  • Railway passenger car brake slack adjuster

Railway passenger car brake slack adjuster

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Railway brake slack adjuster can be widely used in fundamental braking devices of various wagons, whose design conforms to the UIC standard. In braking, the slack adjuster can extend or shrink with the change of the shoe clearance, so as to maintain the brake cylinder piston within the scope of specified stroke and keep normal clearance between the brake shoe and the car wheel, thus ensuring the braking force of the car and improving safe operation.


  • Description
  • Specification
  • Benefits

Railway brake slack adjuster can be widely used in fundamental braking devices of various wagons, whose design conforms to the UIC standard. In braking, the slack adjuster can extend or shrink with the change of the shoe clearance, so as to maintain the brake cylinder piston within the scope of specified stroke and keep normal clearance between the brake shoe and the car wheel, thus ensuring the braking force of the car and improving safe operation.


Main Technical ParametersZTI250ZTI450ZTI600
Maximum adjusting scope 250mm450mm600mm
Maximum allowable tension78.4kn78.4kn78.4kn
Maximum length after installation of the slack adjuster1420mm2018mm2566mm
Minimum length after installation of the slack adjuster  1170mm1568mm1966mm
Once maximum contraction of screw60mm60mm135mm
Once maximum extension of screw30mm30mm30mm
Mass of slack adjuster proper  25kg30kg44kg


Main Feature:

ZTI slack adjuster is composed of two parts – the proper and the control. The proper mainly consists of the cylinder assembly, sleeve assembly, guide nut spring case assembly, front cover, screw, outer sheath, spring, pull rod, etc. The control consists of the joystick and the joystick head.


  1. 1) Keep the clearance between brake shoe and wheel normal

  2. 2) It has two-way adjustment function

  3. 3) It has a compact structure and reliable self-locking mechanism

  4. 4) Ensure that the vehicle braking force does not decay

  5. 5) Ensure driving safety

  6. 6) Durable and easy to install