Leading the world in rotary measurement since 1940
Leading the world in rotary measurement since 1940
+44 (0) 1225 426206

About RPI

About RPI


Rotary measurement is what we know and do best. We design, develop, manufacture, service and calibrate all our own products to deliver solution driven devices into aerospace, power generation, dimensional metrology, scientific and advanced engineering industries all over the world.

Rotary Innovation

We have a passion for innovation and problem-solving. An on-going program of design and development continually enhances our range of circular geometry and angular positioning products. This is why our advanced air bearing technology allows us to measure extremely large components to sub-micron accuracy and our Quadrant range is designed to totally optimise CMM inspection.

Engineering Heritage

Since the 1940’s, we have developed and acquired over 75 years of expertise in the rotary measurement field which means our customers can benefit from decades of experience in evolving highly accurate, application specific rotary devices.

We are the world’s largest manufacturers of rotary devices with an install base of over 2530 systems being used for applications that include CMM, circular geometry, calibration, general metrology and scientific.


We are a trusted by our customers to deliver an exceedingly dependable service with products that have a service life measured in decades not just years. Some of which are still going strong three decades later!