Introduction

AAR automatic slack adjuster (hereinafter referred to as “slack adjuster”) can be widely used in fundamental braking devices of various wagons, whose design conforms to the AAR 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 Parameters

Maximum adjusting scope                                                        600mm

Maximum allowable tension                                                     78.4kN

Maximum length after installation of the slack adjuster           2,400mm

Minimum length after installation of the slack adjuster           1,800mm

Once maximum contraction of screw                                       135mm

Once maximum extension of screw                                          30mm

Mass of slack adjuster proper                                                   44kg

 Structure

Automatic 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.

Production and Process: