Ball Lock Mounting Systems

The Ball Lock Mounting System is designed to speed accurate locating and locking of fixture plates and subplates. The system consists of three parts: a Locating Shank, a Liner Bushing, and a Receiver Bushing.

Using the Ball Lock Mounting System is a simple three step process. Install receiver bushings in your machine table or subplate, and liner bushings in your fixture plate; then insert the locating shanks through the liners and into the receivers to provide accurate location.

A couple of turns of the set screw in each of the locating shanks provides positive holding force. Eighteen locating shanks, two types of receiver bushings, and two types of liner bushings are available to suit your individual requirements.

It is recommended that the use of the Ball Lock Mounting System for locating and clamping of fixture plates be incorporated in a systematic process.

All fixture plates should have two locating points positioned as far apart as possible. There is no advantage to having more than two locating points.

If more than two flanged shanks are required to provide additional hold-down force, omit liner bushings in the additional holes in the fixture plate and allow 0.76mm over the nominal size. The additional clearance will insure that these holes have no influence on the locating holes.




Any Ball Lock application requires at least two sets of shanks, receiver bushings and liners. The liners

are placed into the fixture plate to ensure extremely accurate positioning. If more than two shanks are required (to provide additional hold down force), omit the liner bushing so

that these additional holes will not interfere with the primary locating holes.

Shank & Bushing Mat’l: 4340 Heat Treat: Shanks Rc 40-45; Bushings Rc 50-54; Liners Rc 62-64.

Liner Mat’l: 52100 Finish: Black Oxide


Locating repeatability will determine if one primary and one secondary or two primary liners are needed.

With two primary liners, repeatability of ±0.013 mm can be maintained if the two holes for receiver bushings

are held to a centerline distance of ±0.005 mm tolerance.

Bolt-In Recessed Bushing

Two styles of receiver bushings are available. Generally, the Bolt-in Recessed Bushing is

utilized in blind hole applications (slip fit). The Reverse Mount bushing is used in through hole applications (light press fit).

Reverse Mount Bushing