PULL BACK CHUCK
Pull back chucks do exactly what their name implies, they pull the part back into the work stop during the clamping cycle. These chucks are aggressive with high clampking forces and come in two configurations. Pin: and Lever: with the later available in a "Ball" style. This type of chuck is less accurate than the collet or diaphragm style but offers greater load clearances making them excellent for first and second machining operations in casting, forged, or billet material of almost any shape and seze. Coupled with custom design including various numbers of jaws and their placement. Along with strategically positioned work stops and radial locators, the application of this chuck is almost limitless. Movement or actuation is typically hydraulic or drawbar.
This member of the chuck family is a high precision work holding solution with only slightly less run out and repeatability accuracies then the diaphragm style and work well with surfaces that have larger length to diameter ratios. By applying lighter clamping forces, distortion is held at a minimum. In both O.D. and I.D. Grip configurations with greater load clearances than the diaphragm chuck . This is a great application for second operation, finish, and semi finished machining where the clamping interface is a controlled surface, ie machined. Along with custom design, these chucks are made to accommodate an almost infinite number of shapes and sizes. Including collet features like keyed, splined, and serrated or odd geometric shapes. Master collets with replaceable pads or jaws, which can be smooth or carbide impregnated, help to improve resistance to slipping. Air registry and auxiliary clamping can also be added to become your solution to a work holding challenge. Several means of actuation are available from hydraulic, pneumatic, and drawbar for higher volume runs to manual and spring loaded clamping for one offs or inspection applications.
This high precision chuck is primarily used where a great deal of accuracy is required. Due to it's nature, load clearance is minimal. Requiring a controlled clamping surface. (typically machined to a high accuracy) By applying lighter clamping forces, distortion (particularly with thin walled or webbed parts) is virtually nonexistent. As with all of our design solutions, we offer options such as removable grip pads of varying textures, to stir around capabilities (used to fine tune concentricity between the chuck centerline and the spindle centerline) making this style of chuck almost endless in it's application. It is our goal to work with your team and focus on your work holding challenge to optimize the machine tool operator interface and provide you with a solution that will both maximize output and quality, and at the same time minimize downtime and frustration. Movement or actuation is typically hydraulic, pneumatic, and draw bar or spring loaded.