Constant Contact Side Bearings

Roller Assist

The TCC-III-RA standard travel models incorporate the same metal-to-metal design as the ST and LT models, with the addition of a roller-assist feature to improve railcar curving. Designed for a set up height of 5-1/6": with 5/16" travel.

 

Constant Contact Side Bearing Typical Car Applications Preload
TCC-III-30 RA

International Applications

3,000 lbs.
TCC-III-45 RA

Aluminum Hopper Cars (Coal)

Articulated Double Stacks

4,500 lbs.
TCC-III-60 RA

Steel Hopper CarsCenter Beam

Articulated Double Stack - End Trucks

6,000 lbs.
TCC-III-80 RA

Steel Covered Hopper Cars (Grain)

8,000 lbs.

 

The constant contact side bearing can support no more than 85% of the body weight. The maximum side bearing preload that can be utilized for a given car design is calculated by dividing the car body weight by four and multiplying by 85% (AAR Specification M-948-77).