Trial No.

1

(L)

2

(S)

3

(L × S)

4

(L × S)

5

(D)

6

(L × D)

7

(L × D)

8

(S × D)

9

10

11

(S × D)

12

13

COF

Wear rate (mm³/m)

1

1

1

1

1

1

1

1

1

1

1

1

1

1

0.5382

0.0046

2

1

1

1

1

2

2

2

2

2

2

2

2

2

0.4417

0.0044

3

1

1

1

1

3

3

3

3

3

3

3

3

3

0.3355

0.0048

4

1

2

2

2

1

1

1

2

2

2

3

3

3

0.5802

0.0041

5

1

2

2

2

2

2

2

3

3

3

1

1

1

0.4989

0.0046

6

1

2

2

2

3

3

3

1

1

1

2

2

2

0.4761

0.0038

7

1

3

3

3

1

1

1

3

3

3

2

2

2

0.5963

0.0052

8

1

3

3

3

2

2

2

1

1

1

3

3

3

0.5632

0.0044

9

1

3

3

3

3

3

3

2

2

2

1

1

1

0.5128

0.0037

10

2

1

2

3

1

2

3

1

2

3

1

2

3

0.6512

0.0044

11

2

1

2

3

2

3

1

2

3

1

2

3

1

0.4965

0.0038

12

2

1

2

3

3

1

2

3

1

2

3

1

2

0.4032

0.0046

13

2

2

3

1

1

2

3

2

3

1

3

1

2

0.4617

0.0048

14

2

2

3

1

2

3

1

3

1

2

1

2

3

0.3842

0.0042

15

2

2

3

1

3

1

2

1

2

3

2

3

1

0.3078

0.0037

16

2

3

1

2

1

2

3

3

1

2

2

3

1

0.5823

0.0039

17

2

3

1

2

2

3

1

1

2

3

3

1

2

0.5069

0.0027

18

2

3

1

2

3

1

2

2

3

1

1

2

3

0.4803

0.0034

19

3

1

3

2

1

3

2

1

3

2

1

3

2

0.4913

0.0037

20

3

1

3

2

2

1

3

2

1

3

2

1

3

0.4284

0.0032

21

3

1

3

2

3

2

1

3

2

1

3

2

1

0.3685

0.0025

22

3

2

1

3

1

3

2

2

1

3

3

2

1

0.4922

0.0040

23

3

2

1

3

2

1

3

3

2

1

1

3

2

0.4465

0.0043

24

3

2

1

3

3

2

1

1

3

2

2

1

3

0.3825

0.0038

25

3

3

2

1

1

3

2

3

2

1

2

1

3

0.5006

0.0044

26

3

3

2

1

2

1

3

1

3

2

3

2

1

0.4787

0.0040

27

3

3

2

1

3

2

1

2

1

3

1

3

2

0.4635

0.0042