RUBBER CONVEYOR BELTS - SELECTION CHART

 

Belt's
Designation

Full Belt Tensile Strength

Maximum
Recommended
Working Tension

Nominal Carcass Thickness

Nominal Carcass Weight

Maximum belt width
(mm) for adequate
load support bulk
density (t/m3)

Minimum belt
width (mm) for
adequate
troughing

Type

Rating

Kn/m

Vulcanised splice

Mechanical fasteners Kn/m

(mm)

Kg / cm / mtr

Upto 1.0

Upto 1.5

Upto 2.5

20 Deg. Idlers

30 deg idlers

45 deg ilders

General duty

200/2

250/2

315/2

315/3

400/2

400/3

500/3

630/3

200

250

315

315

400

400

500

630

20

25

31

31

40

40

50

63

20

25

31

31

40

40

*

*

2.4

2.5

2.7

3.2

2.8

3.4

3.4

3.5

0.022

0.023

0.024

0.025

0.025

0.027

0.030

0.031

650

650

900

1000

1000

1200

1200

1200

500

600

650

800

800

900

900

1000

- -

- -

500

650

650

650

650

800

300

300

300

400

400

500

500

500

400

400

400

500

500

500

500

500

500

500

500

500

500

500

500

500

Heavy duty

200/2

250/2

315/2

315/3

400/2

400/3

400/4

500/3

500/4

630/3

630/4

800/4

1000/4

1000/5

1250/4

1250/5

200

250

315

315

400

400

400

500

500

630

630

800

1000

1000

1250

1250

20

25

31

31

40

40

44

50

55

63

70

90

110

110

140

140

20

25

31

31

40

40

40

*

*

*

*

*

*

*

*

*

2.8

3.0

3.1

3.6

3.2

3.6

4.5

3.7

4.5

3.9

5.0

5.4

5.8

6.6

6.5

7.1

0.026

0.028

0.029

0.030

0.030

0.032

0.044

0.034

0.046

0.036

0.049

0.051

0.054

0.066

0.062

0.080

800

800

1000

1200

1200

1200

1200

1400

1400

1600

1600

1600

1600

1600

1600

1600

650

650

800

1000

1000

1000

1000

1000

1200

1400

1600

1600

1600

1600

1600

1600

500

500

650

800

800

800

800

800

900

1200

1400

1600

1600

1600

1600

1600

400

400

400

500

500

500

500

500

500

650

650

650

800

800

800

900

400

400

500

500

500

500

500

500

650

800

800

900

900

900

900

900

500

500

500

500

500

650

650

650

650

800

900

900

1000

1000

1000

1000

Extra heavy duty

400/4

500/4

630/4

800/4

800/5

1000/4

1000/5

1250/4

1250/5

1400/4

1400/5

1600/4

1600/5

400

500

630

800

800

1000

1000

1250

1250

1400

1400

1600

1600

44

55

70

90

90

110

110

140

140

145

155

180

180

*

*

*

*

*

*

*

*

*

*

*

*

*

4.8

4.8

5.6

6.0

6.5

6.2

7.0

6.8

7.5

7.2

8.2

7.4

8.8

0.058

0.060

0.063

0.065

0.063

0.068

0.075

0.076

0.089

0.077

0.089

0.081

0.100

1200

1400

1400

1400

1600

1600

1600

1600

1600

1600

1600

1600

1600

1000

1000

1000

1200

1400

1400

1600

1600

1600

1600

1600

1600

1600

800

900

900

900

1200

1200

1400

1600

1400

1600

1600

1600

1600

500

500

500

500

600

600

750

750

800

750

800

800

800

500

500

500

500

650

750

900

800

900

800

900

900

900

500

500

500

650

800

900

1000

900

1000

1000

1200

1000

1200

 

NOTE:

  • In the above belt designation, the first set of figures denote the belt strength in kn/m and the second set of figures denote the number of fabric plies.

  • * Denotes that mechanical fasteners are not recommended.

  • The above figures represent the standard construction of conveyor belts. Special constructions can be designed & manufactured against specific requirements.

  • The above figures are approximate values and should be taken into account for the purpose of design & estimation. "NB" reserves the right to change the specifications/parameters without notice because of future technical developments.

Technical Data

Maximum allowable working tension

kN/m/ply

NB cotton fabric range

Approx. Thickness per ply (mm)

Approx. Weight kg/cm/ply/mtr.

Mechanical fasteners

Vulcanised splice

Screw take up

Gravity take up

Screw take up

Gravity take up

28 oz
32 oz
34 oz
36 oz
42 oz
48 oz

1.25
1.40
1.30
1.50
1.85
2.00

0.012
0.013
0.016
0.016
0.019
0.020

4.4
5.3
5.3
5.6
7.0
8.7

4.7
5.6
5.6
6.5
7.6
9.6

4.7
5.6
5.6
6.5
7.6
9.6

5.3
6.1
6.1
7.0
8.0
10.5