BORE GAUGES

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Bore gauges are generally a dial indicator on a long stem to transfer, check or measure the internal measument of a cylinder bore or barrel allowing 3 points to contact the bore surface.

Most popular set is the 50mm – 160mm dial bore gauge set where interchangeable anvils cover the size range required. Various sets of dial bore gauges are available at Miller’s Tooling.

However, commonly small sizes of 3 – 13mm can be measured using a small hole gauge set.

Bores from 12 – 150mm are measured with telescopic gauges sets.

Click here to see TELESCOPIC GAUGES page

INSIDE MICROMETERS  are also used with only 2 point contact, generally from 25mm upwards in diameter.

More accurate sizes can be measured with dial bore gauges, used extensively in the automotive industry. These dial bore gauges can also be with digital gauges.

Miller’s Tooling can offer a comprehensive range of brands & sizes of bore gauges, metric bore gauges , imperial bore gauges to suit your budget or needs.

A dial bore gauge or vernier bore gauge measures a bore directly. The bore gauge has three symmetrical anvils that protrude from the gauge body that are connected to the dial or micrometer mechanism. As the knob is rotated it moves the anvils in or out with respect to the measurements. The knob usually has a slipping mechanism to take the feel out of the device and increase reliability between measurements. The measurement given is the mean diameter of the three anvils, and is usually good to 0.001 mm.

	A “setting ring” is a known standard, hardened & ground to be used to check or calibrate dial bore gauges, etc.
	Three (3 )  point micrometers are used for very accurate sizing of bores.

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CLICK HERE TO VIEW "Telescopic Gauges" PAGE