Abstract: A tool clamping device for holding a cutting tool, the tool clamping device includes a holder, a collet coupled to the holding cavity, and a lock nut. The holder defines a holding cavity. The lock nut includes a nut body engaged with the holder, a rotating member received in the nut body, and a plurality of rollers assembled to the rotating member. The collet is connected to the rotating member, and the nut body rotates relative to the rotating member by the plurality of rollers. The lock nut is configured to press the collet in the holding cavity, and the cutting tool is clamped by the collet.

Abstract: A tool clamping device for holding a cutting tool includes a holder having a holding cavity, a lock nut engaged with the holder, and a collet. The collet includes a collet body and a nut mounting part separated from the collet body by an annular concave part. The collet is tapered and has an axle hole in a central portion thereof, and the axle hole running through the collet body, the annular concave part, and the nut mounting part. The collet further includes a plurality of slots extending along an axial direction of the collet. The collet has an inner wall with a plurality of grooves defined therein. A collet is also provided.

Abstract: A vacuum generator includes a main body, and a nozzle body received in the intake pipe. The main body includes an intake pipe, an outlet pipe, and a vacuum pipe received in the main body. The outlet pipe can be in communication with the intake pipe, and the vacuum pipe can extend away from the intersection of the intake pipe and the outlet pipe. The nozzle body is threadedly attached to the intake pipe and the position of the nozzle body in the intake pipe can be adjustable.