Torque Transmission
8mm Timing Belt Pulleys
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8mm Timing Belt Pulleys

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HTD Timing Pulley, 8mm

Our precision, injection molded, glass reinforced 8mm Timing Pulleys offer efficient power transmission, without slip or backlash. The drive pulleys are reinforced with metal inserts to offer the lightweight advantages of nylon along with the advantages of a metal-to-metal connection at the hub. This combination provides a high strength-to-weight ratio and low inertia.

Features

  • Torque Transmission's 8mm Timing Pulleys are injection molded to rigid standards for true design pitch, giving you the precision you need.
  • Pulleys are available in Standard, Metric and D-bore sizes
  • Flanges: one, two, or no flanges
  • Plastic or metal hubs
  • Setscrews & Keyways
  • Wide selection of ratios to fit your requirements
  • Timing Pulleys also available in 3mm, 5mm, 3/8" pitch, and 1/5" pitch
  • Made In USA

Benefits

  • Unique tooth shape provides no slippage, like there is with flat belts
  • Small, light drives
  • Minimal belt tension required to prevent slippage
  • Minimal backlash
  • No lubrication required - easy to maintain
  • Energy savings

8mm Belt Pitch Selection Guide (pdf)

HTD, 8mm Pitch Timing Pulley Dimensions

Part Number
Number
Of
Teeth
Pitch
Dia.
Outside
Dia.
+/- .005
Flange
Dia.
Hub
Dia.
Standard Bores
Type
Pulley No.
Flange
Code*
1/2
5/8
3/4
1
P14-8M-20
P18-8M-20
P22-8M-20
P24-8M-20
P26-8M-20
P28-8M-20
SF, DF
SF, DF
SF, DF
SF, DF
SF, DF
SF, DF
14
18
22
24
26
28
1.404
1.804
2.206
2.406
2.607
2.807
1.349
1.750
2.152
2.352
2.553
2.759
1.75
2.15
2.56
2.75
2.95
3.14
1.12
1.50
1.50
1.50
1.50
1.50
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P30-8M-20
P32-8M-20
P34-8M-20
P36-8M-20
P38-8M-20
P40-8M-20
P44-8M-20
P48-8M-20
P56-8M-20
SF, ---
SF, ---
SF, ---
SF, ---
SF, ---
SF, ---
SF, ---
SF, ---
SF, ---
30
32
34
36
38
40
44
48
56
3.008
3.208
3.409
3.609
3.810
4.010
4.411
4.812
5.614
2.958
3.156
3.355
3.555
3.756
3.956
4.357
4.758
5.560
3.35
3.54
3.82
3.93
4.13
4.33
4.77
5.16
5.95
1.50
1.50
2.00
2.00
2.00
2.00
2.00
2.00
2.00
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* Flange code designates pulley having one flange (SF), two flanges (DF) or no flange (NF)
Optional setscrew(s) supplied is #10-24

Standard Tolerances for Bore Sizes, Keyways and Setscrews

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