• Own engineering
  • Own manufacturing

Normfinish, as a brand of Leering Hengelo, has been advising customers at home and abroad on an optimal blasting process for decades. Our own engineering department often plays a major role in this, especially when it comes to client-specific custom work. Below we answer a number of frequently asked questions about blast cabinets, and what is involved.


Which blasting principle is the most suitable for me?

As there are various principles, this is not an easy question to answer. Generally the following applies: Injector blasting is used if there relatively little blasting is required and/or the

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What kind of blast media should I use?

Blast media is used for abrasive blasting in blast cabinets, blast rooms and mobile blast solutions. In this article, we will elaborate on the different blasting abrasives and their applications.

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Can a blasting process be automated?

Yes. Normfinish offers the manual and automated blast cabinets as well as blast rooms. These units can also be equipped with an automatic control with or without a robot. The

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What types of abrasive are available?

There are many types, the most often used being: Steel shot (= round) and steel grit (= angular) in various hardnesses, dimensions and compositions (such as stainless steel and steel)

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Can products contaminated with grease and oil be blasted?

In a “dry” blasting process (injector, pressure tank and wheel blasting principle) products must be clean and dry. If not, the abrasive will become contaminated and thus also the entire

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What do we do if Ra, Rt or Rz is on the diagram?

These are rough patches which must be measured with a roughness tester. The roughness increases the surface and provides an anchor profile (= better adhesion) for paints and powder coatings.

Looking for a blast cabinet? What do you need to watch out for?

With a blast cabinet, you can blast an object with the help of a high-pressure blast. Surface blasting is a technique in which an object is ‘sandblasted’, with the aid

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Why do we blast?

to get good adhesion for paints/powder coats (Ra, Rz, Rt value) for a beautiful finish (aesthetics) deburring cleaning/removing oxidation for, for example, a welding process (Sa value) shot peening peen

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Why is a good operating mix important and how can I test it?

A correct operating mix consists of a mix of fine to coarse abrasives. With a good operating mix, you can achieve the desired result in the shortest possible blast time

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What blasting principles are available?

injector and pressure tank principle wet/dry blasting dry ice blasting shard ice blasting wheel blasting

What is shot peening?

Tensile stress in the top layer of a product is converted to pressure stress so that tearing/cracking occurs more slowly. In shot peening, a round abrasive is used, which is

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Are there special environmental requirements?

All of Normfinish’s installations fulfil the NER (Netherlands Emissions Guidelines) and as an option may be constructed with an extra-fine filter. To reduce the noise level, one can use an

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Are extra ATEX provisions necessary?

Depending on the abrasive and the products to be blasted, extra ATEX provisions may be required. If these are necessary, they will be included by Normfinish in the design.

How can you tell if a product has been thoroughly blasted?

The Swedish blasting norm (= Sa) exists to determine cleanliness. The blasted surface is visually compared with the image from this Swedish blasting norm. Normally blasting is done up to

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