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Calibrated Master Ball Sets

These high-quality ball sets are used extensively in: standard laboratories, inspection departments, tool rooms, and for measuring internal grooves, tapers, and setting comparators. Each individual set can be supplied with or without its own wooden display case and certificate of calibration. These are the ultimate ball sets for total accuracy.


 All Ball Sets Available in Grade 10 or 25

 Manufactured in Tungsten Carbide or Hardened Stainless Steel

 Supplied in an Attractive Solid Ash Case

 Available in Standard Sets of: 

       - 1mm to 25mm in 1mm Increments 

       - 1/32 Inch to 1 Inch 

       - To Your Specification

 All Sets Can Be Supplied with a Certificate of Calibration which Lists the Actual Diameter of Each Ball

 In-House (ISO 9002) Certificates Supplied with Each Set

 Certificates Traceable to NIST or NAMAS Available upon Request

Ball-Ended Plug Gauges

Gauges are available double- or single-ended with wire-type handles. The applications include; general bore gauging, checking radii, and thread and gear measurement. Advantages of using the gauge are that gauging is carried using a single-ball diameter, and is correct irrespective of gauge alignment, allowing rapid in-process checking without the risk of jammed or broken gauges.

Fixture and Checking Balls

Tungsten carbide and hardened stainless steel balls are widely used to provide locations and position reference for both manufacturing tooling and for metrology. Tungsten carbide has the advantage of high hardness 1500 - 1600 HV, and a low coefficient of expansion. Stainless steel offers the same dimensional accuracy, and has a coefficient of expansion which matches most steels. It does require greater care in handling, but is preferred in some metrology and fixturing applications. Examples shown are of our standard types, which are available in a range of sizes and configurations. Additionally, we frequently manufacture to customers drawings and specifications.

Custom-Made Products

Balls on Shafts, Stems, or Wires

For handling or identification purposes, having a ball attached to a stem or wire of some form can greatly simplify the use of the ball. In measurement applications, particularly if a range of similar size balls are used, the ability to identify size visible can be of great advantage.

Modified Balls

Half- or part-balls, balls with through or blind holes, and balls with internal threads or flats. In many instances, where a spherical or partially spherical surface is required, manufacture of all balls offer significant advantages in terms of accuracy or cost.

Ballizing Balls

Ballizing provides a simple method of producing tightly controlled hole tolerances at very low cost. In practice, a ball of the appropriate size is pressed through a pre-machined bore causing plastic deformation to occur in the bore wall. Elastic recovery then takes place, and produces the final hole size.

Contact us to learn more about our industrial precision balls and other products.