Grind the steel - you should know that


How and with which processes steel is ground industrially, and what you must always pay attention to when grinding steel, can be found here. In addition, what is especially important when grinding stainless steel.

Definition of loops in the DIN

DIN 8589 distinguishes between four basic types of machining in the so-called "machining processes":

  • Cutting with a geometrically determined cutting edge
  • Cutting with geometrically undefined cutting edge and the
  • Abtragen (a polishing process) and the
  • Cleaning (removing unwanted surface layers from the steel)

In addition, there are other methods in this category, such as disassembly, splitting or evacuation, which are irrelevant here.

What does grinding mean?

Machining with a geometrically defined surface are all processes that work with certain, smooth tools, such as milling or turning. On the other hand, a geometrically indeterminate blade has, for example, abrasive paper (since the abrasive grains are irregularly arranged and have irregular abrasive surfaces). Only these are loops.

grinding species

When grinding, you can easily distinguish between:

  • Grinding with rotating tools (grinding wheel)
  • Belt grinding (with a belt grinder)
  • Stroke loops (back and forth without rotation)

Important for the sanding result

For the grinding result, in addition to the method used, the grain size and the removal rate of the abrasive and the duration of the grinding is important. Added to this is the force used to grind the workpiece (changes the material removal). A finer form of grinding is then polishing (ablation).

grinding oils

Occasionally, so-called grinding oils (in the industrial sector) are used. They support the grinding process and remove chips.

Grind stainless steel

Stainless steel is often confused with stainless steel. But both are different steel categories that have nothing to do with each other.

The grinding of stainless steels can lead to the loss of stainless properties. This also applies to steels that are protected against corrosion by a surface layer (such as a galvanized surface). If this surface is sanded, no corrosion protection is available.

Much more problematic, however, is when stainless steel in the course of grinding with so-called black steel (which is any non-stainless steel) or comes into contact with pure iron. This can happen through:

  • Iron wire brushes
  • Grinding dust of stainless steel grindings
  • Contact with non-stainless steel or iron material

Tips & Tricks

In these cases, corrosion can form very quickly.
A loss of corrosion protection can occur in individual, surface-treated steels (such as galvanized steels) even by polishing. So be careful.


Video Board: Pantera - We'll Grind That Axe For A Long Time