A rod which couples the driving wheels of a locomotive, enabling them to act as a unit.
More example sentences
- Additional clearance can be generated by counterboring the coupling rod to accept the head of the bush.
- The big end bearing on the right hand coupling rod had some white metal repaired, by puddling up.
- If you haven't built it yet - do so - fuse it to the coupling rod or the wheel - it doesn't matter which.