Key-Operated I.D. Body Assembly

Royal’s line of I.D. Workholding Systems provides a wide range of off-the-shelf solutions for many common turning, milling, and grinding applications.

Our unique modular design covers a standard gripping range from 0.5” to 3.25”, with specials available up to 25”. Sleeves offer parallel expansion for maximum rigidity, and accuracy is guaranteed to ± 0.0005” TIR.

I.D. Workholding Advantages:

• Allows for full access to the entire length of the workpiece so all external diameters can be turned in a single operation, guaranteeing perfect concentricity.
• On sub-spindle machines, I.D. gripping on the second spindle eliminates the risk of surface damage that can be caused by second-op O.D. gripping of a previously-turned diameter.
• For many parts, the engagement-length of an I.D. bore can be greater than what is available for O.D. gripping, resulting in superior rigidity and torque transmission.
• I.D. systems tend to be more streamlined than O.D. systems, enabling better part access – especially important for use on machines with live tooling.

Key-Operated I.D. Body Assembly:

• Royal’s Key-Operated I.D. Workholding System incorporates a precisionground 1-1/2" diameter straight shank that enables the unit to be held in any collet or jaw chuck, reducing setup times by eliminating the need to change out the machine’s workholding device.
• Side-actuated with an included square-drive key means that this unit can accommodate parts with blind bores.
• Precision-ground square and concentric within 0.0005". If higher accuracy is needed the mandrel can be clocked-in once the unit is gripped in a chuck.
• Universal straight shank mount enables this ID workholding system to be easily moved from machine to machine as jobs require.
• A great option for low-volume ID gripping.
• Order mandrels, locators, and sleeves separately.
• When ordering, be sure to also order the appropriate threaded expanding rod adapters sold separately.