Disc Finishing Machines
Drag Finishing Machines
Stream Finishing Machines
Electropolishing Units
Tub Vibrators


Perfectly suited for workpiece processing in small to mediumsized production lines.

Equipment:SF MANUAL

  • The OTEC stream finishing process offers much shorter processing times compared to conventional procedures. It also allows users to automate processes easily without jeopardising reliability. The shorter cycle times mean that the systems can be integrated smoothly into industrial production lines.

  • In this new process, one or more workpieces are clamped in a holder and immersed in the rotating process drum fi lled with grinding or polishing media. The actual processing motion is the result of the grinding or polishing media fl owing around the workpiece, combined with the rotation of the workpiece itself.

  • In stream fi nishing, workpieces can be deburred, smoothed and polished in a single process. The technology can also be used to round workpiece edges. This is made possible by the high fl ow speeds of the grinding or polishing media achieved using SF technology. The arising forces press the fi ne polishing media granules into tiny, diffi cult-to-access areas like grooves and notches. This enables roughness depths of below Ra 0.03 μm.

  • In addition, contour-controlled motions help process certain areas with greater precision. To ensure even abrasion across the entire workpiece, this motion occurs alongside standard processing and is automatically monitored. The machine‘s special design allows the fl ow angle of the grinding or polishing media to be adjusted. This enables control of material abrasion to the micrometre level. This combination of high automation, powerful processing forces and quick workpiece changing during the procedure allow for fast and effi cient workpiece processing.

We get you to the finish with μ precision.In series production, reliably repetitive results and costeffectiveness deliver a real competitive edge.

Precision finishing

This fast mass fi nishing process ensures extremely short process times, even with complex shapes. Parts can be deburred, rounded, smoothed or polished in a single work step. This process also effortlessly achieves roughness depths of far below 0.1 μm.

Rounding cutting edges

Rounding a tool’s cutting edge by even a small amount like 15 μm can stabilise the edge and ensure a perfect, burr-free geometry. This protects the edge against breakages and signifi - cantly improves both the service life and process reliability of the tool.


With smoothing, the roughness of the surface is reduced, i.e. the unevenness in the peaks on the surface are removed. The benefits this brings include reduced friction, higher contact ratios and less wear. A further benefit is the removal of droplets after PVD coating.


In addition to improving the appearance of the workpiece surface, polishing also improves the physical properties of the surface. A polished chip fl ute on carbide cutters and drill bits can increase the maximum cutting speed, for example, as well as boosting coating adhesion. A polished forming die will have a longer service life and lower friction coeffi cients.

ZOTEC stream fi nishing machines offer versatile, fl exible and effi cient surface fi nishing for small or large series production. If required, they can be fi tted with the right automation systems for every application.

By choosing an OTEC SF, not only are you choosing uncompromising German quality, but a secure future too.With a comprehensive range of standard equipment, optional extras and countless automation choices, our machines help you scale your production.

You can increase operating comfort and process reliability further with optional modules. Immersion depth control, for example, controls the immersion depth of the workpiece depending on the process. It can be programmed either manually or fully automatically. Wet processing machines feature a dosing unit that allows users to adjust the compound concentration via the touch panel.

Variant 1: Decentralised lifting unit

Here, all holders and workpieces are immers ed simultaneously. This version is mostly used with manual loading and unloading.

Variant 2: Centralised lifting unit

All lifting units are immersed individually. One workpiece is changed while the others are processed. This variant results in shorter downtimes and is mostly used with automatic loading and unloading.

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