ZEMA grinding machines

Specialist in corundum grinding

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Specialist in corundum grinding

The traditional Brazilian brand ZEMA joined the JUNKER Group in 2015. Founded in 1953, the company has specialized in the production CNC grinding machines with corundum grinding wheels.

ZEMA produces ingeniously engineered machine concepts in its location in São Paulo – for grinding workpieces such as gear, turbocharger and articulated shafts, crankshaft
flanges and journals and also non-standard solutions.

ZEMA utilizes the worldwide sales and servicing network of the JUNKER Group and works predominantly for customers from the automotive and tool industry.

Corundum grinding machines – versatile, robust, durable

The corundum grinding machines fulfill the requirements of series production for a wide range of different workpieces. The CNC grinding machines grind elements such as flanges and journals on crankshafts as well as gear, turbocharger and cardan shafts with the utmost precision and reliability.

The NUMERIKA model range is designed for the series production of a wide variety of different workpieces – up to a length of 3.50 meters in the biggest model.

The cylindrical grinding machine KARGO takes ultra-heavy workpieces such as shafts for generators or electric motors with weights of up to six tons easily in its stride.

Rounding off the range are the FLEXA corundum grinding machines, which are capable of solving up to three grinding assignments with the utmost precision. Whether internal or external grinding and even thread grinding: the modular design of the robust FLEXA series makes it ideal for medium-sized production runs.


  • Perfect grinding results
  • Robust machine bed
  • Hydrostatic guides
  • Grinding spindles on roller or hydrostatic bearings
  • User-friendly control system
  • Outstanding surface quality
  • Integration in production lines
  • High degree of automation
  • Automatic loading and unloading systems

Our experts will provide you with an overview of our wide-ranging portfolio

We would be happy to advise you on individual requirements such as process optimization, digital networking, and tailor-made machine concepts.

We would be pleased to invite you to our headquarters in Nordrach, where you can see the outstanding properties of JUNKER machines for yourself.

In our technology centers, you can carry out exhaustive testing using your own workpiece to assess the technical and economic performance of a machine.

Company History


Mr. Zselics founded the mechanical workshop São José for the production of mechanical parts, assemblies and devices for other companies


The company name changed to Zselics & Cia., an operating machine factory, starting the manufacturing of the Zema milling machine


Always working in the mechanical construction sector started production of universal milling machines and parallel lathes, totaling approximately 4,000 machines scattered throughout Brazil


A major expansion occurred when the company was moved to Riacho Grande in São Bernardo do Campo, SP in an land area of 280,000 sq.m, in a covered area of 10,000 sq.m


The company has expanded its product range to produce a line of surface grinding machines and internal cylindrical with Know-how acquired a traditional European company


Launch of Numerika External cylindrical CNC Grinding line


Creating Retrofitting Division


Development of specific grinding machine for heavy Crankshafts


It is the beginning of the first exports to Europe and USA


Began to be exported the first grinding machines for: USA, ITALY, FRANCE and CANADA


Supply a series of machines to grinding of Injection Nozzle with high level of automation


Launch a new line machines, Futura, Pratika, Intertronika


Zema - 50 years


ISO 9001 – 2000 certification


Supply a grinding machine with double (B axis) to grinding tungsten carbide parts


Qualified majority in Zema Zselics Ltda., Brasil


Erwin Junker Maschinenfabrik GmbH
Junkerstraße 2
77787 Nordrach