PEMTec PECM Machining | High-Precision Solutions by Rainford

Across industries like aerospace, automotive and medical, the demand for ultra-precise machined parts continues to grow. While traditional CNC machining offers impressive accuracy, the PECM (Precision Electromechanical Machining) process takes accuracy and efficiency to a new level, shaping metal workpieces with micro-level accuracy, all without any physical contact between the tool and the material.

Pioneered by leading German manufacturer PEMTec, this technology, often referred to as “pemming” to differentiate it from more traditional contact methods, uses a saltwater electrolyte and an electrical current to dissolve material from the workpiece, which takes on the inverse shape.

This non-contact application for metal removal and the superior level of accuracy it confers is becoming increasingly popular with high-precision manufacturers who work with hard-to-machine materials, parts with complex geometries and those where precision is paramount, such as medical components, turbine blades or fuel injection nozzles.

The PEM 800 is considered the big brother of the range with a larger working area to allow the use of bigger tools and a 9600A generator.

Technical Data:

Machine frame constructed from natural granite
Working space 375 – 545 mm (min/max)
Machining table 660 × 540 mm (W×D)
Required space 2,200 × 2,560 × 2,870 mm (W×D×H),
excluding electrolyte preparation (see description PEMAQUA)
Maintenance-free precision work axis with direct drive

Download the entire technical datasheet below.

Precise machining of almost all metals – PECM can work with most metals regardless of hardness, including superalloys (Inconel, Hastelloy, etc) and PM steels

Micron-level accuracy – The technology enjoys a standard created surface quality up to Ra 0.03 µm and offers highly accurate reproduction and high-quality surface finish every time

Burr-free – No chips or burrs, reducing the need for secondary processing

No thermal damage – As the process is non-thermal, there is no risk to heat-affected zones

Stable workpieces – With no mechanical or thermal strain, there are no microscopic changes to the structure of the workpiece, which could affect lifespan or integrity

Time saving – Short processing times with a single workflow (roughing, finishing and polishing). Also capable of simultaneously manufacturing macro/microstructures

Versatile – Suitable for prototyping, short production runs and serial manufacturing
Extended tool life – There’s no wear and tear on tools or chemicals used in the process

About PEMTec’s And Rainford’s Partnership

PEMTec is a global technology leader at the forefront of its field, and Rainford Precision is proud to act as the sole authorised agent for them in the UK and Ireland.

The French based, German-owned engineering company, founded in 1995, has always had one vision – to refine and develop PECM technology, taking it from the developmental stage through to industrial standard, ultra-precision machines suitable for mass production that redefine accuracy in electrochemical machining.

With more than 30 years of industry experience, Rainford Precision is ideally placed to understand the unique needs of manufacturers across multiple industries and advise on PEMTec machines. Offering both comprehensive expertise in high-precision applications and ongoing technical support, Rainford is a trusted partner for all your precision manufacturing needs.

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PEM 3.1 SX CC

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PEM 3.1 SX

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PEM 800

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PEM 800s

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PEM AQUA

I would like to say thank you for your assistance so far. We have only drilled 4 x 0.80mm holes 50d deep but the fact they worked the first time was appreciated by everyone.

Senior Manufacturing Engineer

Moto Sport

We use OSG mainly but when we have a specific job that needs doing, we come to Rainford Precision because they are and do the Crème De La Crème of Products and services.

Works Manager

Precision Engineering

The End Mill was an ideal choice due to the unusual shape and the need to have a small radius. They turned out great, and the surface finish is really good.

External Works Manager

Precision Engineering

I would like to say thank you for the help you have given our project over the last few years. Your advice on the correct cutters plus the right speeds and feeds has not only helped with accuracy but brought the cycle times down so we can meet our project deadlines.

Mechanical Engineering

Education Sector

Thank you for making that so incredibly easy and prompt.

Manufacturing Engineer

Precision Engineering

We received your delivery this morning as you had promised to do for us, thanks for that, it is great when a plan comes together.

Production Engineer

Precision Engineering

A diamond service from Rainford as usual. The success of our company is very much down to the external support received from Key organisations such as Rainford Precision. Your company is one of the first I will always turn to assist us.

Senior Production Engineer

Precision Engineering

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