Starrett Small-Bore Gauges
Measure the diameter of small holes, grooves, and recesses. The end of these gauges has a 360° contact surface that’s easier to center in tight spaces than anvils or spring-loaded contacts. Use them to measure slots and bores in precision parts, such as electronics, where small size deviations can cause inefficiencies.
Insert the probe into a bore and turn the knob on the handle to expand the contacts. To find the bore diameter, use a micrometer to measure the distance across the contacts.
Half-ball gauges are best for measuring near the bottom of flat, shallow bores.
Starrett Small-Bore Gauge Sets
Check a variety of hole, groove, and slot diameters. Each gauge in these sets has a different measuring range. The end of these gauges has a 360° contact surface that’s easier to center in tight spaces than anvils or spring-loaded contacts. Use them to measure slots and bores in precision parts, such as electronics, where small size deviations can cause inefficiencies.
Insert the probe into a bore and turn the knob on the handle to expand the contacts. To find the bore diameter, use a micrometer to measure the distance across the contacts.
Half-ball gauges are best for measuring near the bottom of flat, shallow bores.
| Measuring Range | Material | Number of Gauges | Includes | Manufacturer Model Number | Each | |
Half-Ball Small Bore | ||||||
|---|---|---|---|---|---|---|
| 0.125"-0.5" | Steel | 4 | One half-ball gauge with 0.125"-0.200" measuring range and 2" max. depth One half-ball gauge with 0.200"-0.300" measuring range and 3" max. depth One half-ball gauge with 0.300"-0.400" measuring range and 3" max. depth One half-ball gauge with 0.400"-0.500" measuring range and 3" max. depth | S831EZ | 000000 | 0000000 |