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Mahr’s new option package for its Marform MMQ 200 Formtester enables the measurement of surface-finish parameters according to accepted ISO, ASME and JIS standards.

The combined hardware/software MMQ 200 surface-finish option reduces setup and measurement cycle times while reducing the overall cost of both form and surface measurement, as only a single piece of equipment is required.

Brett Green, managing director at Mahr UK, said: ‘The key to providing accurate surface-finish data with a form machine is high resolution and low residual noise.

‘Unlike many form measurement machines that have been designed to measure longer wavelengths and allow five to 10 microns between data points, the control system of the MMQ 200 has been designed with roughness measurement in mind.

‘It can sample data with spacing down to 0.5 microns, which is well within accepted international standards for roughness measurements,’ he added.

The key to this combined measurement capability is the company’s automated probe system, with the T7W motorised bidirectional probe allowing in-cycle automatic switching between the form and surface styli.

The roughness option package utilises the same skidded diamond-tipped PHT stylus as the one used on Mahr’s PS1 and M300 surface-finish measuring machines and the same Marwin-based surface-finish software as in the company’s Marsurf XR 20 contour measurement system.

The roughness stylus is mounted opposite the ruby-tipped form probe on the T7W probe head, with the MMQ 200 automatically swivelling the probe to apply the diamond stylus.

It changes from horizontal to vertical measurement as needed, utilising standard surface-finish parameter cut-off lengths.

A skid-less probe measuring option is also available.

Optimised for measuring cylindricity and other deviations of form and position, the MMQ 200 Formtester comes as standard with Mahr’s latest Easyform software.

It is compact and fast and can be used in the metrology laboratory or on the shop floor.

The new hardware/software option package for surface roughness measurement includes Mahr’s Advanced Form software for creating automated solutions for demanding applications.

The MMQ 200 is ideal for use by machine operators in production areas where immediate measurements can minimise scrap, save time and reduce production costs.

Optimised for the measurement of cylindricity through rotational table axis and vertical-axis integration, the MMQ 200 can perform a range of ISO and/or ASME form checks, including roundness, straightness, flatness (from a polar trace), parallelism, concentricity, co-axiality, run-out, total run-out, taper, perpendicularity, angularity and angle sector (roundness, flatness and run-out).

Green continued: ‘For many applications, the ability to take surface and form measurements with a single setup can reduce costs and speed up the overall measurement process without sacrificing measurement quality.

‘The new surface roughness measurement option is now being extended to other instruments in the MMQ Formtester range, including the popular MMQ 400 Formtester shown at the recent Control Show in Stuttgart,’ he said.


Mahr is one of the world’s largest manufacturers in metrology, specialising in high quality precision products and services for engineers.

Company – Mahr– Manufacturing in the UK continues to be an important growth industry, generating 10% of GVA and comprising 44% of exports. With strong growth comes faster, more precise manufacturing. Smaller components require less margin for error and more stringent quality control.

The importance of metrology in modern manufacturing has never been more prominent. Providing the crucial information for quick, reliable measurement to support and inform decisions. Metrology has the power to drive manufacturing excellence.

Since developing our first Vernier calipers back in 1868, we have accumulated over 150 years’ of metrological expertise. Producing the world’s first digital indicator and microprocessor controlled roughness-measuring instrument. We now hold over 10,000 different products and we continue to drive the leading edge of innovation in modern metrology.

Our highly trained team operates from 52 countries across the globe. Driving metrological research, high quality production whilst supporting our valued customers.

Our trusted measuring instruments feature in all manner of prominent processes from automotive and aerospace manufacturing to biomechanical research and mechanical engineering. Wherever precise measurement is required, there is a Mahr tool for the job. From caliper’s to high-end customised measuring systems you can rely on Mahr for low measuring uncertainties and well manufactured instruments built to last.

We aim to ensure the quality of every product manufactured. Every service undertaken and every procedure implemented in order to satisfy our customer needs. Many of the Mahr group companies have certified quality management systems that comply with DIN EN ISO 9001:2008.

We let precision speak! We make it our job to ensure that the results are accurate. Our range of products extends from calipers to customized high-end measuring systems with direct connection to your production process.

HANDTOOLS – Vernier and Digital Calipers, Digital and Dial Comparators, Micrometers, Measuring Tools and Inspection Equipment, Standard Gauges and Gauge blocks, Electrical Length Measuring Instrument and Air Gauges, Universal Measuring Instruments, Test Indicators and 3d Touch Probes, Interfaces and Data Processing, Roughness and Contour Instruments, Comparator and Indicator Stands, Dial and Digital Indicators, Indicating Measuring Instruments, Height Measuring Instruments

SYSTEMS Profile – Roughness and Contour, Form Measurement, Precision – Reference Systems, Geometry – Gear Metrology, Custom – Bespoke Inspection, Shaft Measuring Systems, Optical Measuring Instruments

SERVICES – Mahr Training, Application Specialists, Technical Service and Maintenance, Repair and Product Upgrades, Calibration Services, Warranty Of Systems/Products, Subcontract Measurement Services, Consultancy – Measuring Strategies

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