self-centering chuck

self-centering chuck

[′self ¦sen·tə·riŋ ′chək]
(mechanical engineering)
A drill chuck that, when closed, automatically positions the drill rod in the center of the drive rod of a diamond-drill swivel head.
References in periodicals archive ?
The laser is mounted into the gearbox through-hole (counter-bore) by using a self-centering chuck, which has a specially adapted plate that is centered to the feet to within 0.0005 in.
A universal, three jaw, self-centering chuck with 0.001-0.002 of repeatable capability is accurate enough in many applications.
is a five-axis horizontal machining center with a two axis contouring table and an integral hydraulic operated two jaw self-centering chuck. Prismatic parts up to 6" requiring machining up to six sides including compound angles can be machined in a single chuck.
The attachment is equipped with variable speed control from 0 to 150 rpm and is fitted with a 200 mm diameter permanent magnetic chuck with optional workholding such as circular tables and self-centering chucks. Suitable for toolroom and production work, the attachment achieves surface flatness of 0.005 mm.