Precision and economic efficiency for your application

Precision grinding wheels

Individually tailored ATLANTIC grinding wheels not only achieve high stock removal rates but also the highest surface finishes in all areas of application.

We offer grinding wheels in vitrified bonds for normal working speeds of up to 40 m/s, and special peripheral speeds of 50 m/s, 63 m/s, 80 m/s, 100 m/s and 125 m/s. Wheels in resin bonds are available for normal speeds of up to 50 m/s and also for special higher rated speeds of 63 m/s and 80 m/s.

ATLANTIC grinding wheels can be individually and precisely tailored to suit the respective requirements of the workpiece. Our defined production processes in conjunction with the latest production technology guarantees safety, reliability and a consistent standard of quality.

Information on identification of grinding wheels and grain types

Identification of grinding wheels

An alphanumeric code specifies the ATLANTIC products. A complementary combination of test procedures ensures compliance with the specification. Documentation of this data ensures traceability and the ability to reproduce the ATLANTIC product. Synthetically produced hard crystalline materials are used almost exclusively as the abrasive. The most common conventional abrasives include corundum (aluminium oxide) and silicon carbide.

Information about grain types

Fused aluminium oxide

This is a crystalline aluminium oxide (Al2O3) and is divided in order of increasing purity, i.e. regular, semi-friable and fused aluminium oxide.

  • Regular aluminium oxide: 95-96 % Al2O3 – in grain types NK1 - NK9
  • Semi-friable aluminium oxide: 97-98 % Al2O3 – in grain types HK1 - HK9
Microcrystalline sintered aluminium oxide

The fine crystalline structure ensures only small particles are broken off in the event of increased grain wear. This ensures optimum use of the abrasive grain.

  • Fused aluminium oxide: 99.5 % Al2O3 – in grain types EK1 - EK9
  • EB or EX microcrystalline sintered aluminium oxide in grain types IB0 - EB9
Silicon carbide

Silicon carbide is harder, more brittle and sharper edged than aluminium oxide and is predominantly used for hard and brittle materials, such as grey cast iron, carbide and non-ferrous metals.

  • Silicon carbide in grain types SC1 - SC9
  • SB or SX microcrystalline sintered aluminium oxide in grain types SB1 - SB9
Types of bond

The bond is responsible for ensuring the grain remains on the grinding wheel until it is blunted by the cutting process. The bond should then release the grain to allow the use of a new, sharp grain.

This property is adapted to the respective grinding process via the type and quantity of the bond. ATLANTIC grinding wheels are manufactured in two groups of bonds: Resin bonds (designated 'RE') and vitrified bonds (designated 'V').

The examples in the PDF (click on the thumbnail to the left) represent successful applications with different types of bond. We produce various bonds for particular applications.

Grinding wheel hardness, structure and pore forming agents

Grinding wheel hardness

The hardness denotes the strength with which the abrasive grain is held by the bond within the grinding wheel. An alphabetical letter identifies the hardness grade, whereby A represents very soft and Z represents very hard.

Hardness grade: A to D extremely soft, E to G very soft, H to K soft, L to O medium, P to S hard, T to Z very hard.


The structure of a grinding wheel is denoted by a number between 1 and 18, which relates to the spacing between the individual grain particles. Low numbers mean small spacing, whereas higher numbers mean large spacing.

Pore forming agents

The volume of pores is determined by the percentage of grain and bonding used. More coolant can be channelled into the grinding contact zone through a larger porous surface, for example, to reduce the risk of burning. The structure of the grinding wheel can be coordinated to the respective application in terms of type, quantity and size through the use of pore forming agents.

Further information and downloads