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    5 Products

    Starrett Small-Bore Gauges

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

    Full-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.
    Full-Ball—Full-ball gauges are best for deep bores. They’re less likely than half-ball gauges to tilt within the bore, which helps to avoid skewed measurements caused by placing the gauge off-center.
    Distance Measured
    Range
    Max. Dp.
    Measured
    Material
    Mfr. Model
    No.
    Each
    Full-Ball Small Bore
    0.125" to 0.2"2 1/2"Steel829A2100A1000000
    0.2" to 0.3"2 1/2"Steel829B2100A200000
    0.3" to 0.4"2.7"Steel829C2100A300000
    0.4" to 0.5"3"Steel829D2100A400000
     

    Starrett Small-Bore Gauge Sets

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

    Full-Ball Gauge Set

    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.
    Full-Ball—Full-ball gauges are best for deep bores. They’re less likely than half-ball gauges to tilt within the bore, which helps to avoid skewed measurements caused by placing the gauge off-center.
    Distance Measured
    Range
    Material
    No. of
    Gauges
    Includes
    Mfr. Model
    No.
    Each
    Full-Ball Small Bore
    0.125" to 0.5"Steel4One full-ball gauge with 0.125"-0.200" measuring range and 2 1/2" max. depth
    One full-ball gauge with 0.200"-0.300" measuring range and 2 1/2" max. depth
    One full-ball gauge with 0.300"-0.400" measuring range and 2.7" max. depth
    One full-ball gauge with 0.400"-0.500" measuring range and 3" max. depth    		S829EZ2100A50000000
     
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