Answer: headstocks

AnswerCrossword Clue
headstocksHEADSTOCK, the bearings or supports of revolving parts in various machines
headstocksThe horizontal end member of the underframe of a railroad vehicle
headstocksA set of bearings in a machine, supporting a revolving part
headstocksThe widened piece at the end of the neck of a guitar, to which the tuning pegs are fixed