Bore Gauge

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Bore gauges are precision measuring instruments used to check the internal diameter of holes, bores, and cylinders. They verify whether a machined bore falls within specified tolerances by using GO/NOGO methodology — if the GO end enters and the NOGO end does not, the bore is within tolerance.

Ensures machined bores meet dimensional tolerances quickly and reliably
GO/NOGO design eliminates the need for reading scales, reducing operator error
Reveals bore conditions such as ovality, barrelling, taper, and back taper
Reduces scrap by accurately distinguishing good parts from out-of-tolerance ones
Faster than comparative measuring instruments like dial bore gauges or CMMs for pass/fail inspection
Durable construction provides long service life in shop-floor environments
Available in multiple configurations (double ended, single ended, deep bore) to suit different bore depths and diameters
Manufactured to international standards (BS 969, DIN 7164, ANSI B89.1.5) ensuring traceability and consistency
UKAS and in-house certification available for quality assurance compliance

We’re currently working on enabling direct online ordering for your convenience. Soon, you’ll be able to place orders directly on our website.

In the meantime, please use the enquiry form or contact us via email or phone to place your order. We appreciate your patience.

Email: info@hammco.com
Tel: +44 (0)1442 212211

ROK-IT gauges are truly spherical - part of a ball. They can be presented to the bore at any angle without struggling for alignment, and rocked over centre to check size.

When using a ROK-IT, there is no discernible friction, so you really can gauge 'size for size' - unlike conventional gauges where excessive friction can use a big chunk of the workpiece tolerance just to push the GO end into the bore. In other words, a conventional plug gauge can reject good components. ROK-IT doesn't.

The Big Advantages

Name: Bore Gauge
Brand: Hammco
Availability: OutOfStock

At Hammond & Company, international leaders in the field of Deep Hole Drilling, we naturally know a lot about the machining and measuring of bores.

The problems associated with conventional plug gauges are all too familiar - struggling for alignment, time wasted removing a jammed gauge - resultant damage to both gauge and workpiece. ROK-IT gauges make these issues a thing of the past.

No jamming or swelling in the bore - If the 'GO' end rocks over centre and the 'NOGO' stops, the bore is within tolerance. Fast and simple.

Exceptional gauge life - less friction means less wear.

Versatility - Instantly reveals conditions of ovality, barrelling and taper. Even back taper in a blind bore.

Eighty per cent lighter - we dispensed with unnecessary metal so you dispense with unnecessary effort.

Range of Products

ROK-IT gauges can be purchased as either double ended 'GO' and 'NOGO' with a standard 100mm ( 4in ) handle, or in the larger diameters often with single ended handles also 100mm long.

ROK-IT gauges below 16mm ( 0.630 in ) diameter are supplied with a 'taperlock' design handle, giving an effective length of 90mm ( 3 1/2 in )

Longer handles can be supplied upon request. However if the bore is very long we can supply an articulated 'deep bore' handle to the length required.

ROK-IT gauges over 300mm ( 12 ins ) in diameter will be supplied in the single ended design, but with two handles equi-spaced for ease of use.

Unless otherwise specified, ROK-IT gauges are manufactured to the following standards for gauge manufacturing and wear tolerance.

UKAS and in-house certification is available.

UK -BS 969 - 2008

EUROPE -DIN 7164 - 1966 - 08

USA - ANSI B89. 1.5 - 1998

What Makes Hammond & Company Different?

A world leader in deep hole drilling products with state-of-the-art manufacturing and internationally recognised expertise.

85+ Years

Three generations of UK craftsmanship

+0/-0.005mm

Guaranteed accuracy on every drill

Worldwide Delivery

Express shipping available

Lifetime Support

Expert technical assistance included