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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 is 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
Urethane BeltsOpen-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 TeethMolded 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 MemberThe 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 Range23 to +158 ºF
Standard Durometer92 Duro. Shore A
85 Duro. Shore A-FDA
Coefficient of FrictionUrethane 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 ConstructionsHytrel
Heavy Backing
Belt SelectionsBelt Selection Range: Steel, Kevlar® – Welded, Open-Ended
Belt SizesBelt Size Range: XL – STD 8
Pitch Inch Range:0.200” – 0.875”
Pitch Metric Range: 5 mm – 20 mm
Standard Roll LengthsRoll Length Range: 100’ – 200’ and 50M – 100M

For other special constructions and colors contact our Technical Department

Standard WidthWidth Inch Range: ¼” – 18”
Width MM Range: 6.35 mm – 457.2 mm
Belt SectionBelt Section Range: XL – XH
Width TolerancesTolerances Range: +0.020 – -0.125” and +0.8 mm – -4.8 mm

  • PHONE: 1-866-672-6339
  • EMAIL:

Wish to speak with someone right away? Simply call and speak to one of our knowledgeable F.N. Sheppard experts. They will be able to begin engineering a belt that suits your needs quickly and professionally.

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″