6 Facts About Tungsten Carbide Balls and How To Use Them

//6 Facts About Tungsten Carbide Balls and How To Use Them

6 Facts About Tungsten Carbide Balls and How To Use Them

26th Sep.2019


01 What is tungsten carbide ball

Tungsten Carbide Ball: commonly known as tungsten carbide sphere, hard alloy ball, refers to a ball made from WC powder with binders like colbalt, nickel, etc..

TC ball is famous for its high hardness, wear resistance, corrosion resistance, and bending resistance. Therefore, it’s ideal for applications where extreme conditions must be served.

high precious grinding balls

02 Grades of tungsten carbide ball

Miller carbide provides two series of different grades for selection depending on the different applications of tungsten carbide balls. In request of more wear-resistance, we suggest to use WC-Co grades. The binder contents between 6% and 25% and grain sizes range from 0.4 to 3 μm. Below table shows the wear resistance as a function of the cobalt content.

Wear resistance performance

In most corrosion-wear situations, an optimum choice is the WC-Ni grades, which are resistant down to pH 2 to 3. These grades retain WC as the hard phase and substitute Co for Ni; thus, they exhibit mechanical and thermal properties similar to those of the WC-Co grades.

03 Classifications & Applications

Tungsten carbide balls including carbide balls as sintered and finished carbide balls are classified by the surface finish level.

tungsten carbide milling balls

Extremely good wear resistance and dimensional stability make tungsten carbide balls the preferred choice for grinding/milling media, precision hydraulic valves, high-load bearings, ball screws, linear bearings in slideways, gauging and checking instruments, and meters. 

04 How is tungsten carbide ball made

tungsten carbide manufacture process

05 Tolerance list of TC balls

AFBMA Ball Grades and Tolerances

GradeSphericity in inchesSphericity in mmBasic Diameter Tolerance in inchesBasic Diameter 2 in mmMaximun Surface Roughness
G30.000003"0.0000762mm+/-0.00003"+/-0.000762mm0.5
G50.000005"0.000127mm+/-0.00005"+/-0.00127mm0.8
G100.000010"0.000254mm+/-0.0001"+/-0.00254mm1
G250.000025"0.000635mm+/-0.0001"+/-0.00254mm2
G500.000050"0.00127mm+/-0.0002"+/-0.00508mm3
G1000.0001"0.00254mm+/-0.0005"+/-0.0127mm5
G2000.0002"0.00508mm+/-0.001"+/-0.0254mm8
G5000.0005"0.0127mm+/-0.002"+/-0.0508mm
G10000.001"0.0254mm+/-0.005"+/-0.127mm

06 How to make sure your carbide ball is not ‘fake’?

The tungsten carbide balls’ weight can be calculated by the following formula. 

weight(g)=4/3 R3 x Density x 1/1000

 =4/3 X 3.14x(D/2)3 x Density x 1/1000

=4.1866x(D/2)3 x Density x 1/1000

=0.5233X D3 x Density x 0.001

i.e. what’s the weight of the 10mm tungsten carbide balls with grade MC6 (Density:14.8g/cm³)?

Weight of 10mm tungsten carbide ball=0.5233×10³x14.8×0.001=7.7g

If the ball is less than the calculated weight, there is a highly risk that the ball is made from recycled or other material rather than tungsten carbide.

By |2019-10-09T09:38:45+00:00September 26th, 2019|Blog|0 Comments

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