Used to measure internal diameters where places standard measuring instruments are hard to reach.
Self centering, spherical measuring faces with carbide tips give more durability.

The constant spring pressure on the measuring faces ensure accurate part readings with high repeatability.

Comes in a set of 6 pcs.

1. Choose correct measuring range
2. Put gauge into part
3. Lock gauge with screw pin
4. Remove gauge from part
5. Measure gauge length with micrometer or caliper

Technical Information

Measuring range: 8 – 12.7 mm / 12.7 – 19 mm / 19 – 32 mm / 32 -54 mm / 54 – 90 mm / 90 -150 mm

472030 – with measuring depth 102mm and 127mm
472031 – with measuring depth 300mm

• Steel made, satin chromed
• Self-centering, spherical measuring faces, hardened
• Constant spring pressure on the measuring faces
• With fixing device

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