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    1 Product

    Starrett Small-Bore Gauges

    Image of Product. Half-Ball Gauge. Front orientation. Contains Inset. Bore Gauges. Starrett Small-Bore Gauges, Half-Ball.

    Half-Ball

    Gauge

    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—Half-ball gauges are best for measuring near the bottom of flat, shallow bores.
    Distance Measured
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    Each
    Half-Ball Small Bore
    0.2" to 0.3"3"Steel831B2205A2000000
    Starrett Half Ball Small-Bore Gauge, Model 831B, 0.2" to 0.3" Measuring Range
    EachIn stock
     
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