Resinoid Wheels/Technical Information

What is an abrasive wheel?
An abrasive wheel is a self-sharpening grinding or cutting tool composed of abrasive grains held in place by a bonding agent. All abrasive wheels, with a few exceptions, are reinforced with one or more layers of fiberglass mesh for extra strength, flexibility and safety.
 

How do abrasive wheels work?
As the wheel comes into contact with the work piece, exposed surface grains grind away small chips of the material. During the grinding process, new grains are constantly fracturing, exposing new sharp cutting points. This process also wears away the bond between the grains causing the old dull ones to break away while constantly exposing new sharper grains until the wheel is completely worn down.
 

Most common used grains
ALUMINIUM OXIDE: a tough wedge-shaped abrasive used for cutting or grinding metals.
SILICON CARBIDE: a very hard and sharp abrasive used for cutting and grinding concrete, masonry, stone and other non-metallic materials.
ZIRCONIUM: an extremely resistant grain used for cutting and grinding metals.
 

Grain sizes
Numbers are used to indicate grain size:
Coarse ? ? 8 - 16 - 24 - 30 - 36 - 60 - 80 Fine
Faster cut Slower cut
Rough finish Smooth finish
 
Bonding agent
A synthetic organic resin holds the grains together. The amount of bonding material determines the toughness and resistance of the wheels under cutting or grinding loads. The more bonding agent, the harder the wheel.
 
Letter codes indicate wheel hardness:
Soft A ? ? ? N - P - Q - R - S - T ? ? ? Z Hard
Fast cutting Long life
 
Reinforcing materials
One or more woven fiberglass mesh, impregnated with resin, are added to ensure resistance encountered from lateral and centrifugal pressures. Thickness and type of fiberglass mesh used vary according to the machine being used with the wheel.
 
Types of depressed center wheels
TYPE 27: these should be used at an angle to the workpiece between 30° and 45°. Do not grind flat.
TYPE 28: manufactured with a built-in grinding angle for flat grinding.
The right choice
Determining the right specification depends on several factors: the type of material to be cut or ground, the R.P.M. of the tool, type of finish desired, etc. It is very important that you choose the appropriate wheel for the application desired. For any other technical information, contact our customer service department.
 
WARNING!
MISUSE OF ABRASIVE WHEELS IS EXTREMELY DANGEROUS.
FOR FURTHER INFORMATION CONCERNING SAFE USAGE OF ABRASIVE PRODUCTS, CONSULT THE ANSI B7.1 SECURITY CODE.