troll plate
Noun
Meaning
troll plate (plural troll plates)
(engineering) A rotary disk with spiral ribs or grooves, by which several pieces, such as the jaws of a chuck, can be brought together or spread radially.
Noun
troll plate (plural troll plates)
(engineering) A rotary disk with spiral ribs or grooves, by which several pieces, such as the jaws of a chuck, can be brought together or spread radially.