Wholesale moulded injection custom sizes timing belt door slide sheave small plastic nylon pulley wheels with bearings

Property

Item No.

Unit

MC Nylon

 (Natural)

Oil Nylon+Carbon   

  (Black)

Oil Nylon

 (Green)

MC90

 (Blue)

MCNylon+MSO2 

(Light Black)

Mechanical 

Properties

1

Density

g/cm3

1.15

1.15

1.135

1.15

1.16

2

Water absorption 

  (23℃ in air)

%

1.8-2.0

1.8-2.0

2

2.3

2.4

3

Tensile strength

MPa

89

75.3

70

81

78

4

Tensile strain at break

%

29

22.7

25

35

25

5

Compressive stress 

  (at 2%nominal strain)

MPa

51

51

43

47

49

6

Charpy impact strength

 (unnotched)

KJ/m2

No brak

No break

≥50

No BK

No break

7

Charpy impact strength

 (notched)

KJ/m2

≥5.7

≥6.4

4

3.5

3.5

8

Tensile modulus of 

elasticity

MPa

3190

3130

3000

3200

3300

9

Ball indentation hardness

N/mm2

164

150

145

160

160

10

Rockwell hardness

-

M88

M87

M82

M85

M84