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What Is The Binder?
Jul 05, 2018

What is the binder?


The substance that is used to bond the abrasive in the grinding wheel is called a binder. The bonding agent determines the grinding wheels’ strength, hardness, heat resistance and corrosion resistance.

1. Classification of grinding wheel binder

Ordinary abrasive grinding wheel: vitrified bond, resin bond, rubber bond(not commonly used)

Superhard material grinding wheel: metal bond, resin bond, vitrified bond and electroplating

2. The application range of different binders

 

Type

Symbol

Advantage

Disadvantage

Application

Line speed

Vitrified bond

V

High strength, heat resistance,

Sharp and high efficiency

 

Crisp

Forming grinding

Normal grinding:
30-35m/s

High-speed grinding:
≥45m/s


Ordinary abrasive :
40-80m/s


Superhard abrasive:
35m/s

Resin bond

B

Good flexibility and polishing

 

Less heat resistance

 

High-speed grinding, cutting, grooving

Rubber bond

R

It has better flexibility and can be polished

It is difficult for rough grinding

Polishing wheels

Metal bond

M

Good forming, high strength

Less grinding function

Rough grinding, semi-accurate grindingtungsten carbide,cutting ceramic, optical glass, semiconductor.

Electroplated

E

Simple technology, no need dressing.

the poor retention, the abrasive is easy to fall off.

High-speed grinding, especially glass edge grinding.

 

3. The base material [The base body is made of aluminum, steel or bakelite, which the functions are as a supporting working layer and a chucking tool]

Vitrified bond diamond/cbn grinding wheel: aluminum

Resin bond diamond/cbn grinding wheel: generally used aluminum, sometimes steel body (for example: when the grinding wheel is very thin, the steel body is used to ensure the strength)

When selecting the base material, we should consider the cost, and choose the material with low density, small centrifugal deformation and small thermal expansion at high speed rotation.

4. The common applications

The resin bond diamond wheels are suitable for processing carbide materials.

Resin bond cbn grinding wheel is suitable for grinding quenched steel.

Metal bond grinding wheels are suitable for glass/ceramic/agate material.

Vitrified bond grinding wheels are suitable for silicon/magnetic materials

JR company specializes in diamond and CBN tools, including resin bond, vitrified bond, metal bond and electroplated grinding wheel.

Please welcome to know more information:www.jrdiamondtoolsgroup.com