Rail Car Slack Adjuster Air Brake Parts 78.4 KN TB 1899 Standard

Air Brake Parts Brake Slack Adjuster Brake Regulator for Railway Car

Brief introduction:
Slack adjuster is also known as automatic brake shoe clearance regulator. It is an important part of the truck braking rigging device. When the brake shoes are worn and the clearance between brake shoe and wheel thread increases, the slack adjuster will automatically shorten and adjust the clearance between brake shoe and wheel thread to the normal range; When the new brake shoe is replaced, the clearance becomes smaller, and the slack adjuster automatically extends to adjust the clearance to the normal range, so as to keep the piston stroke of the brake cylinder within the specified range.

At present, the commonly used slack adjuster for freight cars in China are ST1-600 and ST2-250 two-way slack adjusters, both of which are controlled by levers. The main difference is the extension length of screw: ST1-600 type’s extension length is 600 mm, while ST2-250’s is 250 mm. ST1-600 type slack adjuster is generally installed at the position of the upper pull rod of the original vehicle, and ST2-250 slack adjuster is generally installed at the position of the middle pull rod in the original vehicle. ST brake slack adjuster has two-way adjustment function, and adopts non self-locking threaded mechanical structure. It has features of reliable function, compact mechanism, rapid action and no interference to air braking.

Technical parameters:

Detail photos:

ST1-600 Slack adjuster and ST2-250 slack adjuster


Inside struture of ST type slack adjuster:


Application on railway frieght cars:


FAQ:
1. What is the L value of the screw length of the brake regulator after loading?
When all vehicles are equipped with new high wear synthetic brake shoes, the extension length of brake regulator rod is: st1-600 500-570mm; ST2-250 type: 200-240mm

2. What are the advantages of installing brake regulators on vehicles?

• No matter whether the clearance between the brake shoe and the wheel is larger or smaller than the normal clearance, the brake regulator can automatically adjust to the normal clearance. In this way, the braking stroke can be maintained within the specified range and the necessary braking force can be maintained. Therefore, it can stop within the specified braking distance to ensure the safety of the train;
• During driving, the braking force of each vehicle is uniform, which can reduce the impact of each vehicle in the train due to uneven braking force and make the train stop smoothly;
• Save labor, reduce the heavy physical labor of train inspectors and reduce the stop inspection time;
• Save the compressed air consumption of the train, save energy and reduce the inflation time of the train.