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Lexair’s full-bore, fixed-length, self-contained collet chuck allows full-capacity spindle operation, due to elimination of the drawtube. When using the full bore chuck, spindle capacity is boosted as much as 30 percent, and clamping pressure is unaffected by centrifugal force, regardless of rpm, according to the company.
An adjustable grip lightly grasps delicate tubing or clamps tight for deep rough-cutting operations. Suitable for bar feeding or slugging, the chuck can be used on main or sub spindles, rotary indexers and machining center tables.
The chuck’s open/close time is less than one-half second, and it provides true dead length clamping with no drawback. A mechanical locking action holds the workpiece, even without air pressure, for failsafe operation. The chuck uses air to release the work, rather than secure it, and spring force holds the workpiece while it is being machined. The chuck has full concentricity adjustment to help maintain accuracy when using Master collets with S-type pads.
Lexair’s full-bore chuck is available in seven models with body diameters from 6 to 14 inches, and bar capacity from 2 to 5.5 inches. It also features direct spindle mounting for A5, A6, A8 and A11 tooling.
Related Glossary Terms
- chuck
chuck
Workholding device that affixes to a mill, lathe or drill-press spindle. It holds a tool or workpiece by one end, allowing it to be rotated. May also be fitted to the machine table to hold a workpiece. Two or more adjustable jaws actually hold the tool or part. May be actuated manually, pneumatically, hydraulically or electrically. See collet.
- collet
collet
Flexible-sided device that secures a tool or workpiece. Similar in function to a chuck, but can accommodate only a narrow size range. Typically provides greater gripping force and precision than a chuck. See chuck.
- machining center
machining center
CNC machine tool capable of drilling, reaming, tapping, milling and boring. Normally comes with an automatic toolchanger. See automatic toolchanger.
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