cannon box

English

Noun

cannon box (plural cannon boxes)

1. (mechanical engineering) A type of enclosure for axle bearings.
   • 1959 June, “The first "Peak" class 2,300 h.p. diesel-electric locomotive for B.R.”, in Trains Illustrated, page 296:

     The outermost non-driven axle forms a pony truck within the bogie frame, with its bearings in a cannon box.