Belt Class

Pulley Type

No. of Plies

Belt Class

Pulley Type

No. of Plies

2

3

4

5

2

3

4

5

160

A

315

630

A

500

630

630

800

B

250

B

400

500

500

630

C

200

C

315

400

400

500

200

A

315

800

A

630

800

800

800

B

250

B

500

630

630

630

C

200

C

400

500

500

500

250

A

315

400

1000

A

630

800

1000

1000

B

250

315

B

500

630

800

800

C

200

250

C

400

500

630

630

315

A

315

400

1200

A

1000

1000

1250

B

250

315

B

800

800

1000

C

200

250

C

630

630

800

400

A

400

500

630

1600

A

1000

1250

1250

B

315

400

500

B

800

1000

1000

C

250

315

400

C

630

800

800

500

A

500

500

630

630

2000

A

1250

1400

B

400

400

500

500

B

1000

1250

C

315

315

400

400

C

800

1000

A High tension pulleys Wrap exceeding 45° Head, drive & tripper

B Low tension pulleys Wrap exceeding 45° Tail, take-up, Take-up bend

or

High tension pulleys Wrap up to 45°

C Low tension pulleys Wrap up to 45° Low tension snub or bend pulleys