F.N. Sheppard & Co. | Belting specialist
F.N. Sheppard & Co. | Belting specialist
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Welded Endless & Open Ended Urethane Timing Belts



Urethane has become a workhorse in countless production situations around the world. Why? It's tough, can be made to any length, and stands up to the harshest industrial and environmental conditions. That makes it an outstanding value. Ask us about it.
  • Available Pitch Sizes:
    XL, L, H, XH
    T5, T10, T20, AT5, AT10, AT20
    HTD®: 5M, 8M,14M
  • The widest selection available
  • Steel and Kevlar® cord construction provides excellent strength
  • Cost effective
  • Readily available
  • Long lengths slit to various widths





General Information  · Belt Specifications  · Urethane Specifications & Tolerances - XL, L, H, HHF, HXW, XH  · Urethane Specifications & Tolerances - T5, T10, T10HF, T10-XW, T20  · Urethane Specifications & Tolerances - AT5, ATL5, AT10, ATL10, AT20  · Urethane Specifications & Tolerances - HTD® 5, HTD® 8, HTD® 14, STD 5, STD 8  · Note

General Information

Urethane Belts

Open-ended roll lengths can be thermally welded to almost any required length, or fixed end to end with our clamping plates. Truly endless is the strongest construction, recommended for drive and high torque applications.

Urethane Construction and Teeth

Molded integrally the urethane protects the cords and provides a strong, flexible and excellent wear-resistant belt. Various urethane compounds are available depending on construction. To ensure correct engagement with the pulley grooves, the teeth are precisely formed and accurately spaced. They are precisely located so that the tooth root line lies substantially on the pitch line; thus the tooth spacing of the belt is not altered by flexing. Low friction nylon fabric on the tooth and/or back side, is available on thermal weldable urethane.

Tensile Member

The parallel cord tensile member is the secret of the belt's enormous strength, its excellent flex life, and high resistance to elongation. Various tensile members are available depending on construction and belt pitch; such as Steel, Kevlar® and Polyester.

Urethane Characteristics

  • Working Temperature -22º to +176 ºF
  • Chemically Resistant to Ozone and Sunlight
  • Extremely Resistant to Oil, Grease and Gasoline
  • Hydrolysis Resistant
  • Fairly Acid-proof and Alkali-proof

Temperature Range

23 to +158 ºF

Standard Durometer

92 Duro. Shore A
85 Duro. Shore A-FDA

Coefficient of Friction

Urethane vs. Steel (dry): 0.5 to 0.7
Urethane vs. UFiMV (dry): 0.2 to 0.4
Nylon vs. Steel (dry): 0.2 to 0.4
Nylon vs. UHMV (dry): 0. 1 to 0.3

Additional Constructions

Hytrel
HiTemp
Heavy Backing


Belt Specifications
Belt Section XL L H H-HF H-XW XH T5 AT5
PITCH (inch & metric) 0.200" 0.375" 0.500" 0.500" 0.500" 0.875" 5 mm 5 mm
Ultimate Tensile Strength
per inch of 25 mm belt width
Steel lb/in 730 1330 1570 2380 - 3160 730 1440
N/25mm 3250 5920 6980 10590 - 14060 3250 6410
Kevlar® lb/in 1360 1710 1820 - 760 3450 1360 1710
N/25mm 6050 7610 8100 - 3380 15350 6050 7610
Max. allowable belt tension
(T1 all) per inch of 25 mm belt
width (Safety factor >4)
Open-Ended lb/in 180 330 390 590 - 790 180 360
N/25mm 800 1470 1730 2620 - 3510 800 1600
Welded lb/in 140 190 240 240 100 380 140 210
N/25mm 620 850 1070 1070 440 1690 620 930
Allowable effective tension
for the belt teeth Teall
(15 and more teeth in mesh)
Steel & Kevlar®
Open-Ended
lb/in 180 360 440 440 - 880 200 290
N/25mm 800 1600 1960 1960 - 3910 890 1290
Steel & Kevlar®
Welded
lb/in 130 270 330 330 330 660 150 210
N/25mm 580 1200 1470 1470 1470 2940 670 930
Specific belt weight wb
Steel lb/ft/in 0.036 0.059 0.066 0.072 - 0.180 0.037 0.055
kgf/m/cm 0.021 0.035 0.039 0.042 - 0.105 0.022 0.032
Kevlar® lb/ft/in 0.033 0.052 0.055 - 0.056 0.155 0.033 0.046
kgf/m/cm 0.019 0.030 0.032 - 0.033 0.091 0.020 0.027
Specific belt Stiffness Csp
Steel lb/in 47950 92800 109000 133600 - 213600 47950 100500
N/mm 8400 16255 19085 23400 - 37410 8400 17605
Kevlar® lb/in 52250 69100 60700 - 30350 100000 52250 -
N/mm 9155 12100 10635 - 5300 7500 9155 -
Minimum No. of pulley teeth (z min)
  10 10 14 12 14 18 10 15
Minimum diameter of tensioning
idler running on back of belt
inch
mm
1.125
30
2.375
60
3.125
80
2.375
60
3.125
80
5.875
150
1.125
30
2.375
60
Available in FDA/USDA Construction (FDA/USDA 85 Shore A Urethane)
Y Y Y   Y   Y  
Min. Welded Belt Length
17" 17" 18" 18" 33" 42" 450 mm 450 mm
Standard Roll Lengths
200' 200' 200' 200' 200' 100' 50 M or
100 M
50 M or
100 M

Belt Section ATL5 T10 T10-HF T10-XW AT10 ATL10 T20 AT20 HTD® 5 HTD® 8 HTD® 14 STD 5 STD 8
PITCH (inch & metric) 5 mm 10 mm 10 mm 10 mm 10 mm 10 mm 20 mm 20 mm 5 mm 8 mm 14 mm 5 mm 8 mm
Ultimate Tensile Strength
per inch of 25 mm belt width
Steel lb/in 2380 1570 2380 - 3160 5030 3160 5030 2380 3160 4670 2380 3160
N/25mm 10590 6980 10590 - 14060 22380 14060 22380 10590 14060 20770 10590 14060
Kevlar® lb/in - 1820 - 760 3450 - 3450 4410 2050 3450 4090 2050 3450
N/25mm - 8100 - 3380 15350 - 15350 19620 9120 15350 18190 9120 15350
Max. allowable belt tension
(T1 all) per inch of 25 mm belt
width (Safety factor >4)
Open-Ended lb/in 590 390 590 - 790 1250 790 1100 510 790 1020 510 790
N/25mm 2620 1730 2620 - 3510 5560 3510 4890 2270 3510 4540 2270 3510
Welded lb/in 220 240 240 100 380 380 380 450 240 380 450 240 380
N/25mm 980 1070 1070 440 1690 1690 1690 2000 1070 1690 2000 1070 1690
Allowable effective tension
for the belt teeth Teall
(15 and more teeth in mesh)
Steel & Kevlar®
Open-Ended
lb/in 290 380 380 - 580 580 710 1220 230 420 770 220 410
N/25mm 1290 1690 1690 - 2580 2580 3160 5430 1020 1870 3430 980 1820
Steel & Kevlar®
Welded
lb/in 210 280 280 280 430 430 530 910 160 270 440 150 260
N/25mm 930 1250 1250 1250 1910 1910 2360 4050 710 1200 1960 670 1160
Specific belt weight wb
Steel lb/ft/in 0.062 0.074 0.079 - 0.096 0.114 0.125 0.169 0.070 0.101 0.182 0.067 0.087
kgf/m/cm 0.036 0.043 0.046 - 0.056 0.067 0.073 0.099 0.041 0.059 0.107 0.039 0.051
Kevlar® lb/ft/in - 0.062 - 0.066 0.071 - 0.101 0.124 0.050 0.080 0.143 0.050 0.074
kgf/m/cm - 0.036 - 0.039 0.042 - 0.059 0.073 0.029 0.047 0.084 0.029 0.043
Specific belt Stiffness Csp
Steel lb/in 133600 109000 133600 - 213600 334600 213600 334600 133600 213600 294400 133600 213600
N/mm 23400 19085 23400 - 37410 58600 37410 58600 23400 37410 51560 23400 37410
Kevlar® lb/in - 60700 - 30350 - - - 100000 60700 100000 86500 60700 100000
N/mm - 10635 - 5300 - - - 17500 10635 17500 15150 10635 17500
Minimum No. of pulley teeth (z min)
  15 14 12 16 15 25 15 18 14 20 28 14 20
Minimum diameter of tensioning
idler running on back of belt
inch
mm
2.375
60
3.125
80
2.375
60
3.125
80
4.750
120
5.875
150
4.750
120
7.125
180
2.375
60
4.750
120
7.875
180
2.375
60
4.750
120
Available in FDA/USDA Construction (FDA/USDA 85 Shore A Urethane)
  Y   Y                  
Min. Welded Belt Length
450 mm 450 mm 450 mm 840 mm 600 mm 600 mm 1000 mm 1000 mm 450 mm 456 mm 456 mm 450 mm 456 mm
Standard Roll Lengths
50 M or
100 M
50 M or
100 M
50 M or
100 M
50 M or
100 M
50 M or
100 M
50 M or
100 M
50 M or
100 M
30 M 30 M 50 M or
100 M
50 M or
100 M
50 M or
100 M
50 M or
100 M

For other special constructions and colors contact our Technical Department



Urethane Specifications & Tolerances - XL, L, H, HHF, HXW, XH
Standard Width Belt Section Width Tolerances
Length 17" to 60" (432 mm to 1524 mm) Length over 60" (1524 mm)
code inch mm XL L H HHF HXW XH XL, L H, HXW XH XL, L, H XH
025 1/4 6.35 X           +0.020"    +0.5 mm
-0.030"    -0.8 mm
  +0.030"    +0.8 mm
-0.030"    +0.8 mm
 
031 5/16 7.94 X          
037 3/8 9.53 X X X X    
050 1/2 12.7 X X X X   X +0.030"    +0.8 mm
-0.030"    -0.8 mm
+0.080"    +2 mm


-0.080"    -2 mm
+0.030"    +0.8 mm
-0.050"    -1.3 mm
+0.190"    +4.8 mm


-0.190"    -4.8 mm
075 3/4 19.05 X X X X   X
100 1 25.4 X X X X   X
150 1 1/2 38.1 X X X X   X +0.030"    +0.8 mm
-0.050"    -1.3 mm
+0.050"    +1.3 mm
-0.060"    -1.5 mm
200 2 50.8 X X X X   X
300 3 76.2   X X X   X +0.060"    +1.5 mm
-0.060"    -1.5 mm
+0.060"    +1.5 mm
-0.080"    -2 mm
400 4 101.6   X X X   X
600 6 152.4     X X X X +0.060"    +1.5 mm
-0.100"    -2.5 mm
+0.060"    +1.5 mm
-0.120"    -3.1 mm
900 9 228.6         X      
1200 12 304.8         X   +0.060"    +1.5 mm
-0.125"    -3.2 mm
+0.60"    +1.5 mm
-0.125"    -3.2 mm
1500 15 381         X  
1800 18 457.2         X  




Urethane Specifications & Tolerances - T5, T10, T10HF, T10-XW, T20
Standard Width Belt Section Width Tolerances
Length 450 mm to 1525 mm Length over 1525 mm
mm T5 T10 T10-HF T10-XW T20 T5, T10, T10-HF, T10-XW T20 T5, T10, T10-HF, T10-XW T20
4 X         +0.5 mm
-0.75 mm
  +0.75 mm
-0.75 mm
 
6 X        
8 X        
10 X X X    
12 X X X     +0.75 mm
-0.75 mm
+0.75 mm
-1.27 mm
16 X X X    
20 X X X    
25 X X X   X +2.0 mm
-2.0 mm
+4.8 mm
-4.8 mm
32 X X X   X +0.75 mm
-1.27 mm
-1.27 mm
-1.52 mm
50 X X X   X
75 X X X   X +1.52 mm
-1.52 mm
+1.52 mm
-2.0 mm
100 X X X   X
150   X X X X +1.52 mm
-2.5 mm
+1.52 mm
-3.18 mm
225       X      
300       X   +1.52 mm
-3.18 mm
+1.52 mm
-3.18 mm
380       X  
450       X  




Urethane Specifications & Tolerances - AT5, ATL5, AT10, ATL10, AT20
Standard Width Belt Section Width Tolerances
Length 450 mm to 1525 mm Length over 1525 mm
mm AT5, ATL5 AT10, ATL10 AT20 AT5, AT10, ATL10 AT20 AT5, AT10, ATL10 AT20
4 X     +0.5 mm
-0.75 mm
  +0.75 mm
-0.75 mm
 
6 X    
8 X    
10 X X  
12 X X   +0.75 mm
-0.75 mm
  +0.75 mm
-1.27 mm
 
16 X X  
20 X X  
25 X X X +2.0 mm
-2.0 mm
+4.8 mm
-4.8 mm
32 X X X +0.75 mm
-1.27 mm
+1.27 mm
-1.52 mm
50 X X X
75   X X +1.52 mm
-1.52 mm
+1.52 mm
-2.0 mm
100   X X
150   X X




Urethane Specifications & Tolerances - HTD® 5, HTD® 8, HTD® 14, STD 5, STD 8
Standard Width Belt Section Width Tolerances
Length 450 mm to 1525 mm Length over 1525 mm
mm HTD® 5 HTD® 8 HTD® 14 STD 5 STD 8 HTD® 5, HTD® 8, HTD® 14, STD 5, STD 8 HTD® 5, HTD® 8, HTD® 14, STD 5, STD 8
5 X     X   +0.5 mm
-0.75 mm
+0.75 mm
-0.75 mm
10 X X   X X
15 X X   X X +0.75 mm
-0.75 mm
+0.75 mm
-1.27 mm
20   X     X
25 X X X X X
30   X     X +1.75 mm
-1.27 mm
+1.27 mm
-1.52 mm
40     X    
50 X X   X X
55     X    
85   X X   X +1.52 mm
-1.52 mm
+1.52 mm
-2.0 mm
100   X X   X




Note
All belts are available with Nylon Fabric on either or both sides.
For Nylon on the tooth side, specify "NT"
For Nylon on the back side, specify "NB"
For Nylon on both sides, specify "NTB"

ATI designates stronger cord construction
H-HF & T10-HF designates high flex reinforcement cords
H-XW & T10-XW designates belt width wider than 6" and up to 18"



 MORE IMAGES 

·  Thermally Welded Endless

·  Strength Specifications

·  Tolerances