A structural casting or bent metal bar positioned over a journal box that supports the suspension springs on older freight car trucks. It acts as the load-bearing interface between the wheel assembly and the car body, ensuring weight is distributed evenly across the axles.
Heard on the job
The car knocker bad-ordered the flatcar because the spring saddle was cracked right down the middle.
Related terms
Bogie
A wheeled chassis or framework attached under a rail vehicle to provide support, suspension, and guidance along the track.
Truck
The swiveling wheel and axle assembly located under each end of a railroad car or locomotive.
Hot box
An overheated wheel bearing on a railcar, a defect that can burn the end off an axle if missed.