Timing Belts, Pulleys, High Torque Belts, Light / Heavy Pitch Pulley, Mumbai, India
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Timing Belts & Pulleys

 
The three principal dimensions of Timing Belts are pitch length, pitch of the teeth and width for ordering code
XH Pitch 7/8
std width code
2"
3"
4"
200
300
400
 
 
HIGH TORQUE BELTS
 
Ordering code: Pitch length in mm - Pitch in mm -width in mm 
Example : 1778 - 14 M-85
Pitch length 1778 mm, Pitch 14 mm, Belt width 85 mm
 
3 M
Standard Width
6mm, 9mm & 15mm
5M
Standard Width
9mm, 15mm & 25mm
   
   
8 M
Standard Width
20mm, 30mm, 50mm & 85mm
14M
Standard Width
40mm, 55mm, 85mm, 115mm & 170mm
   
   
TIMING BELTS SIZES
 
'XL' Pitch 1/5"
std width code
1/4"
5/16 "
3/8 "
025
031
037
'L' Pitch 3/8"
std width code
1/2"
3/4"
1"
050
075
100
'H' Pitch 1/2"
std width code
3/4"
1"
1 1/2"
2"
3"
075
100 
150
200
300
 
LIGHT PITCH PULLEY
 
(L) Pitch = 3/8" - L050/L075/L100 'H' Pitch = 1/2" - H100/H150/H200/H300
 
Belt width = H100 - 3/4" & 1", H150 - 1 1/2", H200 - 2", H300 - 3"
 
HEAVY (H) PITCH PULLEY
 
5M 8M 14M
 
 
The number of flanges is given as either 0, 1 or 2. Should a pulley with hub, have only one flange, then it should be designated as follows: 
Flange on hub side (diagram left) - 1a
Flange on the side opposite to the hub (diagram right) - 1g 
 
Example : Pulley with hub for 10 mm belt width  
  Pulley
Material Steel
Pulley width BN
Pitch
Number of teeth
Number of flanges

Hub diameter dN
Hub length BN -B
Bore d or rough bore dv
St
23
T5/
33
-2
Hub
035
8
dv
 

Example : Pulley without hub for 10mm belt width
Pulley
Material Steel
Pulley width BN
Pitch
Number of teeth
Number of flanges
Bore d
D IN 6885 groove
A1
15
T5/
33
-0,
d=12
with groove
 
PULLEY SELECTION SUGGESTIONS
• Pulley diameter should not be smaller than the belt's width.
• If centre distance is more than 8 times the diameter of smaller pulley, both the pulleys should be flanged.
• Never crimp fibre glass cord belts. Crimping will cause damage to fibres, resulting in premature belt failure.
 
 
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