Abrasive

Variety  code

Characteristics

Selection scope

Brown corundum

High rigidity, high tenacity, low price and wide application.

Grinding of metals with higher tensile resistance strength such as carbon steel, alloy steel, malleable cast-iron and hard bronze and others.

White corundum

Its rigidity is higher than that of brown corundum. It has excellent grinding performance and low grinding heat.

Grinding of hardened steel, alloy steel, high-speed steel, high-carbon steel, thin wall parts and others.

Single-crystal corundum

High rigidity, high tenacity and single spherical crystal.

Grinding of materials with high tenacity and high rigidity of stainless steel and high-speed steel and work pieces which are easy to deform and burn.

Micro-crystal corundum

Abrasive which is composed of micro crystal. It has high tenacity and high strength.

Grinding of stainless steel, ball bearing steel and special nodular cast iron. It is used for molding grinding, cutting-in grinding and mirror grinding and others.

Pink fused alumina

Sharp edge of abrasive particle, excellent maintenance of edges and corners and higher durability.

Grinding of work pieces with lower requirements to surface roughness such as knives, measuring implements and instrument screws and others.

Green silicon carbide

High rigidity, brittle performance, sharp abrasive particle and heat conductivity.

Grinding of hard and brittle materials such as hard alloy, optical fiber and ceramics and others..

Black silicon carbide

High rigidity, brittle performance, sharp abrasive particle and heat conductivity.

Grinding of cast iron, bronze, lead, zinc, rubber, leather, plastics, wood and ore and others.

Granul-arity

Granularity number

12#~24#

30#~46#

60#~100#

120#~W20

Less than WA20

Selection scope

Grinding of steel ingot, casting, leather, wood, cutting billet and others.

It is used for coarse grinding processing of plain, external and internal and centreless grinding.

It is used for internal, external, plain, centreless tool and grinding machine and various grinding machines and semi-fine grinding.

It is used for fine grinding, abrasion and screw and others.

It is used for fine abrasion, ultrafine abrasion and mirror grinding and others.

RoughnessRa

~1.8

1.6~0.2

0.2~0.1

0.1~0.012

Rigidity

Selection principle

Selection reason

Select soft abrasive tool when grinding hard materials. Select hard abrasive tool when grinding soft materials.

Select soft rigidity because hard materials are difficult to grind and abrasion particle is easy to be blunt. Select hard rigidity because hard materials are east to grind and abrasion particle is difficult to be blunt.

Select soft rigidity when grinding soft nonferrous metallic materials with large tenacity.

Select soft rigidity to increase self-sharpening performance of grinding wheel because grinding wheel is easy to clam when grinding soft nonferrous metallic materials with large tenacity.

Select soft grinding wheel when grinding materials with poor heat conductivity.

Such materials have high rigidity, low heat conductivity. Temperature will not decrease quickly in grinding region.

Rigidity of selected abrasive tool of cutting and external round grinding is softer than that of longitudinal external round grinding.

Prevent work pieces from burning.

Select hard abrasive tool during molding grinding and grinding of interrupted surface.

Guarantee correct geometric shape of work pieces.

Select soft abrasive tool during plain grinding. Abrasive tool during end grinding shall be harder than that during round grinding.

Abrasive tool has large contact area with work pieces. Abrasive particle is easy to be blunt with increased grinding heat and flammable work pieces.

Abrasive tool of internal round grinding shall be harder than that of external, plain grinding.

Select hard abrasive tool due to low linear velocity of abrasive tool during internal round grinding.

Select soft grinding wheel when grinding knives.

Select grinding wheel which is between H and L due to poor heat elimination conditions of work pieces when grinding knives because work pieces are easy to burn.

Rigidity of high-speed grinding wheels is generally lower than that of ordinary grinding wheels for one or two grades.

Select soft grinding wheel due to high dynamic rigidity obtained by grinding wheel in high-speed revolution.

Rigidity of grinding by cooling fluid is higher than that of grinding wheel during dry grinding.

Select grinding wheel whose rigidity is softer than that of cooling liquid for one or two grades because work pieces are easy to generate heat during dry grinding.

Struc-ture number

Structure number

0

1

2

3

4

5

6

7

8

9

10

11

12

13

14

Grinding mode

Heavy grinding and free grinding (hard and brittle materials)

Internal round, external round, tool, centreless, screw reassembly, free grinding modes and others

Horizontal shaft, plain, tool, gear, cutting, abrasion, ultrafine grinding modes and others

Vertical shaft plain grinding with large contact area, double-end grinding

Binder

Name code

Performance

Application scope

      Ceramics binderV

It has advantages such as stable chemical performance, heat resistance, corrosion resistance, large porosity, high grinding efficiency, small abrasion to maintain geometric shape of abrasive tool with wide application scope but it has larger brittleness.

It can be used for internal round grinding, external round grinding, centreless grinding, plain grinding, screw grinding, molding grinding, edge grinding, abrasion, ultrafine grinding and free grinding and others. It is suitable to grinding of ordinary carbon steel, alloy steel, stainless steel, cast iron, hard alloy, non ferrous metal, foodstuff, wood, glass and ceramics and others.

Resin binderB

Binder has high strength, elasticity, low heat resistance and excellent self-sharpening performance.

It can be used for coarse grinding, abrasion, cutting and free grinding. It can be used to manufacture high-speed, high-smoothness grinding wheel, heavy load, cutting grinding wheels with various special requirements.