R300 Roundness Tester

Roundness Measurement

R300 roundness tester is one of the best devices worldwide for the characterization of surfaces, born from thirty years of experience boasted by SM in this field, it was specifically designed to measure bulky and heavy pieces, with utmost accuracy.

R300 features 3, pneumostatically supported, metrological measurement and positioning axes that ensure fluent movements without frictions and remarkable sturdiness of the entire system.

The main application of R300 consists in the characterization of large size bearings, where all those essential characteristics for the final quality of the product must be determined, among which roundness and race angles, which are measured by following the piece's profile with more axes working at the same time, thus generating a considerable number of measurements.

Product Overview

Pneumostatic plate: Platform diameter: 450 mm, Expansion diameter: 800 mm, Maximum measurable diameter: 1000 mm,Axial bearing capacity: 1200 kg, Radial run-out (at plate level): ≤0,1 μm, Speed: 0,5 – 3 rpm (measurement) 0 – 6 rpm (positioning), Friction: Pneumostatic due to manual rotation, Centring range: ±5 mm, Levelling range: ± 1°, Resolution: 0,1°
Pneumostatic R axis: Useful traverse length: 500 mm, Linearity: ≤ 0,5 μm su 500 mm, Speed: 0,2 – 10 mm/s, Resolution: 0,1 μm
C axis (pneumostatic column): Useful traverse length: 500 mm, Maximum height: 600 mm (from plate surface), Linearity error: ≤ 0,5 μm on 500 mm, Speed: 0,5 – 15 mm/s, Resolution: 0,1 μm
Pick-up: Measurement positioning: In three positions (horizontal, vertical, lateral), Measurement strength: Internal/external 20 – 150 mN, Measurement range: ±1000 μm, Supplied pick-ups: N° 3 two-directional of length 80 - 150 – 240 mm

Everything you need to start measuring from day one.

Find out more about the R300 Roundness Tester

Email Address
Telphone Number



+44 (0)1452 545563


10 King Edwards Avenue, Gloucester, GL1 5DA, United Kingdom.