Due to the situation with the coronavirus, we are currently operating with a reduced workforce.

We have partially resumed operations to support our distributor and direct partners, who supply essential products and services to end users in this unprecedented fight against COVID-19.

We are working hard to respond to your orders and queries and will get back to you as soon as possible.

Waiting times may be longer at the moment so please feel free to contact us at www.starrett.co.uk/contact

S829EZ - Full Ball

S831EZ - Half Ball With Flat Bottom

These small hole gauges are well balanced tools, ideal for accurately measuring small holes, slots, grooves and recesses in all kinds of work. Accurate measurements are obtained by slightly "rocking" these gauges in the hole to be measured. This will guarantee contact at the true diameter. The final size is then obtained by measuring over the ball contacts with a micrometer.

  • Hardened-ball measuring surface with two-point contact.
  • Radius on each gauge is less than the minimum diameter to be measured, which provides the two-point contact necessary for maximum accuracy.
  • Smooth, sensitive adjustment for better feel, giving more accurate measurements.
  • The adjustment of the gauge beyond their range is restricted by a safety stop that prevents breakage.