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Bore Gauges

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About Bore Gauges

Bore gauges measure the inside diameter of holes, cylinders and bores, along with taper and out-of-round, in machine shops, engine rebuilding, hydraulics and quality labs. Dial bore gauges are the common choice for cylinders and housings. Split-type bore gauges and small hole gauges suit holes down to a few millimetres, telescoping gauges transfer a bore size to a micrometer, taper bore gauges check holes quickly, and carbon fibre gauges cover very large diameters.

Choose the gauge whose range covers your bore size, for example 18–35 mm, 35–50 mm or 50–160 mm, and check whether a dial or digital indicator is included or must be bought separately. A bore gauge is a comparator: set it to zero on a setting ring or an outside micrometer at the nominal size, then rock it in the bore and read the lowest point. Long handles help in deep bores. Keep the contact points clean and store the gauge in its case to protect its accuracy.

We list INSIZE, OZAR and Kristeel at prices that include GST, with a GST invoice on every order and delivery across India. Machine shops, engine rebuilders and quality labs buying several units can ask for a bulk quotation.

Questions buyers ask

Does the bore gauge come with a dial indicator?

Some models include a dial or digital indicator and some do not. The product name states 'With Dial Indicator' or 'Without Dial Indicator', so check before ordering.

How do I set a dial bore gauge?

Set it to zero using a setting ring or an outside micrometer at your nominal size, then rock it in the bore and read the lowest point.

Which gauge should I use for very small holes?

Use a split-type bore gauge or a small hole bore gauge. Pick the range that covers your hole size from the product page.

Do prices include GST?

Yes. Prices include GST and every order gets a GST invoice.