headstock

head +‎ stock

headstock (plural headstocks)

1. (mining) A headframe.
   • 1913, DH Lawrence, Sons and Lovers, chapter 6

     It was a beautiful day. At Brinsley pit the white steam melted slowly in the sunshine of a soft blue sky; the wheels of the headstocks twinkled high up; the screen, shuffling its coal into the trucks, made a busy noise.

2. A part of a machine (such as a lathe or drill) that supports a rotating part
3. A beam that supports a bell.
4. A clamp that restrains a cow by the neck.
5. The part of a lute-type string instrument, such as a guitar, that holds the tuning pegs or tensioning screws of the strings.
6. (rail transport) A transverse structural member at the extreme end of a rail vehicle's underframe.

• buffer beam (rail)