• Own engineering
  • Own manufacturing

Leering Hengelo advises its customers at home and abroad for over 70 years such an optimal blasting process . Here our own engineering department often plays a large role , especially when it comes to customer-specific customization. Below we answer some frequently asked questions.


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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What blasting principles are available?

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

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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Can a blasting process be automated?

Yes. Leering Hengelo is a manufacturer of the standard manual blast cabinets and blast rooms. These units can also be equipped with an automatic control with or without a robot.

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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.

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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Which abrasive is the most suitable?

This depends on a number of factors, including: which blasting principle is being used. In a wheel blasting machine, for example, one cannot use aluminium oxide. what material is being

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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 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 Leering Hengelo’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

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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 Leering Hengelo 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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