The cutlery wheels
The majority of the wheels we market are vitrified. Vitrification is a step that gives them unique properties such as high resistance to heat and wear. Our grinding wheels are dedicated mainly to the actors of the cutlery guaranteeing security and a longevity.
Know how to read a reference
The reference indicated on your wheel indicates the characteristics that compose it (abrasive, grain, hardness, ...) The coding is universal whatever the manufacturer or mark of the grinding wheel. However, check the features from your manufacturer, for example the specification of abrasives. Here is a sample reference of a grinding wheel: 89a 60 m 5 V 217
The abrasive
The first 2 digits (or 1 single) and the letter indicates the abrasive used "89a": Corundum (pink, white, red, ...) silicon carbide (green, black, ...), mixture of aluminum oxide and corundum, ....
The color of the grinding indicates the type of abrasive material used, and can be an indicator on the quality. However, the different manufacturers can use different colors for the same types of grinding wheels.
The grains
Then the grain size (wholesale, medium, end and very fine)
- 14 - 36 -> Gros Grain
- 46 - 60 -> Medium Grain
- 80 - 220 -> Fine Grain
- 800 - 1200 -> Very fine grain
Hardness
The letter "M" corresponds to the hardness of the grinding wheel. The more the letter is far in the alphabet, the higher the hardness. Example: R rather hard, G rather tender.
The structure
The number that follows "5" represents the structure of the grinding wheel. The higher the number, the more "open" in the abrasives, the structure is defined "closed" or "open" type. The distribution of abrasive grains and their density on the surface of the grinding wheel: the more the density will be important and the more the grinding wheel will be called "closed". A less density will give an "open" type grinding wheel. There are, of course, semi-open / closed-type grinding wheels.
The binder
The penultimate "V" means the binder (from the vitrified binder, resin, elastic, galvanic, ...), that is to say the substance that connects the abrasive grains between them to form the surface of the grinding wheel. The choice of the binder will depend on the type of application and the materials chosen. For example for a grinding operation on hard lights, a ceramic binder will be chosen both said and on more tender materials a resin binder is more eliminated.
The designation of the binder
The last 3 digits "217" correspond to an internal code defining the type of exact binder, only the manufacturer has access to it.
I hope this trick will help you understand the references of your wheels! This tip is very simple and works for any type or mark of grinding wheel. Find other references in store.
