CNC Expanding Mandrels

February 25, 2016

According to Royal Products, ID gripping is often overlooked as a workholding option, yet in many situations it is the best choice.

It allows for access to the entire length of the workpiece so all external surfaces can be turned in a single operation, ensuring perfect concentricity.

On subspindle machines, ID gripping on the second spindle eliminates the risk of surface damage that can be caused by second-op OD gripping on a previously turned diameter.

For many parts, the engagement length of an ID bore can be greater than what is available for OD gripping, resulting in superior rigidity and torque transmission.

ID systems tend to be more streamlined than OD systems, enabling better part access, which is especially important on machines with live tooling.

Related Glossary Terms

  • inner diameter ( ID)

    inner diameter ( ID)

    Dimension that defines the inside diameter of a cavity or hole. See OD, outer diameter.

  • outer diameter ( OD)

    outer diameter ( OD)

    Dimension that defines the exterior diameter of a cylindrical or round part. See ID, inner diameter.

Additional Products from Royal Products

The Royal Chuck Stop provides a simple, consistent method for locating short parts in a 3-jaw lathe chuck. The chuck stop enables short parts to project beyond the chuck jaws, providing clearance for facing operations.

Royal Products' new Filtermist Ultra is a portable solution for oil mist and smoke that combines Filtermist with cyclonic technology to remove additional pollutants.

Royal Products, a leading live center manufacturer known for custom designs, has standardized five live center point styles.

Royal Products has introduced the Econo-Rack, a device that safely collects finished parts as they come off of any bar-fed CNC lathe.

The Royal Products Chuck Stop provides a simple method for locating short parts in a 3-jaw lathe chuck.

For over 30 years, the Royal Filtermist has been effectively collecting mist and smoke generated by all types of machinery.