Stainless steel glass-bead blasting: good results always the first time round

With the ROTIN®, the rotating insert

Glass-bead blast a large stainless-steel surface, and get it right first time round? From now on, everyone can thanks to the ROTIN®. This innovative tool fits into the jet nozzle, and widens the jet. It eliminates problems with edges, patches or streaks on stainless-steel surfaces, and the roughness complies with the EHEDG standard.

Use the ROTIN® to make your stainless-steel products suitable for the food industry, pharmaceutical sector, or any other company that needs beautiful, smooth results.

View the result

BeforeBefore

Made in Holland, quality guaranteed

The ROTIN® is produced in the Netherlands, and carefully inspected by Kalfsvel Coating, so excellent, consistent quality is standard. That’s a guarantee.

Benefits for suppliers and customers

Stainless-steel blasting with the ROTIN® offers benefits to both machining companies and customers. The desired result is achieved more quickly, and the customer is assured of a smooth, finished product which bacteria and viruses are unable to cling to, and which can be properly cleaned.

How glass bead-blasting with the ROTIN® works

Glass-bead blasting is used to make stainless-steel surfaces smoother and more even visually. The surface is blasted, reducing peaks and opening valleys without cavities (openings) at the micro level. A very fine surface profile is created, where dirt can only form deposits on the peaks. The adhesive strength is minimal, so that the surface remains cleaner and can be cleaned better.

ROTIN® is also used to glass-bead blast stainless-steel surfaces, but gives a better, faster and more attractive result due to the unique way it works. This rotating insert (ROTIN) is placed in the blast nozzle. This insert widens the jet proportionally, and sprays it at an oblique angle. Because the jet widens equally, it blasts every surface with equal intensity at every angle. The blasting is done at a lower pressure, 3 bar instead of 6 bar, and uses 40/70 glass beads instead of 100/200 beads.

Re-blasting or reworking is no longer necessary thanks to the wider, oblique jet. The surface is blasted neatly and smoothly first time round, with no patches and a finer surface profile than that achieved with standard glass-bead blasting.

Glasparelen met de ROTIN® op rvs-oppervlakten

Excellent, smooth blasting results at every angle every time

Glass-bead blasting on stainless steel with the ROTIN® always gives good results,

because it blasts with a wide, uniform rotating jet at an oblique angle. This means the result is always smooth, irrespective of who does the blasting and from which angle you look at it.

Excellent, smooth blasting results at every angle every time

Glass-bead blasting on stainless steel with the ROTIN® always gives good results,

because it blasts with a wide, uniform rotating jet at an oblique angle. This means the result is always smooth, irrespective of who does the blasting and from which angle you look at it.

ROTIN® in numbers

ROTIN® achieves a lot, with less:

  • Energie: 3 bar i.p.v. 6 bar
  • Glass beads: 40/70 instead of 100/200
  • Ra-waarde: 0,2 – 0,6 instead of > 8,0
  • Treatments: Good results first time round, instead of lots of reworking and problems.
  • Lifespan: Unlimited, compared to about 10 years with stainless-steel coating
Rotin glasparelen geeft het beste resultaat

Stainless-steel blasting; a comparison of the methods

Stainless steel is glass-bead blasted to make the material sleek and smooth, eliminate weld discolouration and oxidation, and create an attractive, even surface with the desired roughness. We’ve drawn up a list of the various methods

available, and their pros and cons:

Benefits of glass-bead blasting with the ROTIN® rotating insert
click here for *, **, ***

ROTIN® for the food industry and pharmaceutical sector

Material glass-bead blasted with the ROTIN® meets the strict EHEDG standard, the stainless-steel food grade norm with Ra < 0.8 as a guideline. It’s therefore suitable for manufacturing equipment in the food industry and pharmaceutical sector.

The surface roughness (Ra) of a stainless-steel surface blasted with the ROTIN® at 3 bar using 40/70 glass beads is 0.2 to 0.6 microns. This Ra means that any cavities in the surface are so small that dirt and bacteria can no longer settle there. At the same time, the surface still contains enough cavities to reduce the adhesive force and allow the surface to be cleaned properly.

For metal-coating companies

Standard glass-bead blasting uses a straight, narrow jet, which requires craftsmanship and experience. Someone with these professional skills is not always available, so glass-bead blasting can be a labour-intensive process at many metal-coating companies. After checking under daylight, the blasted product often has to be reworked. This takes more time and energy, and the resulting product often still shows patches and streaks. In addition, ordinary 100/200 glass beads at 6 bar result in a coarser surface (< 8 micron).

With the ROTIN®, every metal-coating company can obtain good glass-bead blasting results on stainless steel. The end product looks sleek and smooth, has a lower Ra value, and the work can be completed in less time with less experienced blasting operators.

The ROTIN®, a revolutionary invention

from metal-coating company Kalfsvel

Cees Kalfsvel at Metaalcoating Kalfsvel  in Zaandam (NL) is a coating specialist. He noticed that experienced workers achieved the best results with glass beads, but those without such experience could never get the desired smooth, streak-free surface so quickly. As a result, he started looking for a better and easier method of glass-bead blasting that would also obtain the surface roughness required by the food and pharmaceutical industries.

Lots of prototypes were designed and tested, but each one was rejected by employees. The project was put on ice, but Cees wanted to try one more idea. He designed the insert with slightly angled holes and extra spaces in the surrounding ring, so that it would rotate without seizing, and then asked an employee to give it a try. It was a success!

Designed by practical experience, the ROTIN® has turned out to be a revolutionary invention that is now used as standard at Kalfsvel Coating, as well as increasingly more other coating companies. The same result is achieved everywhere; once the ROTIN® has been tried, nobody wants to go back to the old method. The reason is that it gives great results first time round, and always blasts neatly without leaving streaks. Exactly what the ROTIN® was designed to do.

Lots of prototypes were designed and tested, but each one was rejected by employees. The project was put on ice, but Cees wanted to try one more idea. He designed the insert with slightly angled holes and extra spaces in the surrounding ring, so that it would rotate without seizing, and then asked an employee to give it a try. It was a success!

Designed by practical experience, the ROTIN® has turned out to be a revolutionary invention that is now used as standard at Kalfsvel Coating, as well as increasingly more other coating companies. The same result is achieved everywhere; once the ROTIN® has been tried, nobody wants to go back to the old method. The reason is that it gives great results first time round, and always blasts neatly without leaving streaks. Exactly what the ROTIN® was designed to do.

Join those using ROTIN®

and achieve better glass-bead blasting results, in less time and with less energy.

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