Body steel.
Bushings carbon steel.

Black oxidized.

These centering clamps enable workpieces to be centerd on and lightly clamped in a bore. The clamps have a wide expansion range. The series covers a bore range of Ø12 to Ø30 mm. To increase the centering accuracy the clamps with internal thread have a centering spigot (D2) for a locating hole. The centering accuracy is ±0.2 mm.
centering clamps with internal threads fit on M6 grid systems (see illustration).