Urethane Timing Belts

Q: What is the difference between steel cord and Kevlar cord?

Steel cord provides near-zero elongation (0.02%) for linear motion and positioning. Kevlar cord provides low elongation (0.3-0.5%) with superior flex life around small pulleys. Use steel for linear motion, Kevlar for rotary drives with small pulleys.

Q: What profiles are available in urethane?

Most standard profiles including T2.5, T5, T10, AT5, AT10, MXL, XL, L, H, HTD 3M/5M/8M/14M, and GT2/GT3. T-profile and AT-profile are the most widely available in urethane.

Q: Can urethane timing belts handle washdown environments?

Yes. Urethane resists water, cleaning chemicals, and mild caustic solutions. For frequent washdown, specify ester-free (hydrolysis-resistant) polyurethane grades.

Q: Does Texas Belting stock urethane timing belts for same-day shipping?

Yes. Common urethane profiles and sizes in stock ship same day from Houston. Specialty sizes or custom-cut lengths may require 3 to 7 business days. Call 888-203-2358 to confirm.

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Urethane Timing Belts

Urethane (polyurethane) timing belts are the preferred choice when standard neoprene belts cannot meet the demands of the application. Polyurethane construction provides superior chemical resistance, abrasion resistance, very low particulate generation, and suitability for cleanroom, food-contact, pharmaceutical, and washdown environments. Texas Belting stocks urethane timing belts across all major profiles and pitches for same-day shipping from Houston.

Urethane timing belts are available with steel wire or Kevlar (aramid) tensile cords and come in both closed-loop and open-end (continuous roll) configurations. Open-end urethane belts can be cut to any length and joined with mechanical connectors or welded splices, making them the standard for linear motion, custom center distance drives, and applications where standard closed-loop lengths are not available.

Urethane timing belt quick specs:
Body material: Polyurethane (thermoplastic PU, typically 85-92 Shore A)
Tensile cords: Steel wire (standard) or Kevlar/aramid (high flex life)
Temperature range: -22°F to +176°F (-30°C to +80°C) standard; high-temp grades available to +212°F
FDA/food contact: Available in FDA-compliant and EU 10/2011 compliant grades
Profiles available: T2.5, T5, T10, AT5, AT10, MXL, XL, L, H, HTD 3M/5M/8M/14M, GT2/GT3
Formats: Closed-loop (welded endless) and open-end (continuous roll)

Need urethane timing belts?

Tell us the profile, pitch, length, and width, or send us the part number from your existing belt. We will confirm the right urethane replacement and provide pricing.

Request a Quote 888-203-2358

Why Choose Urethane Over Neoprene?

Standard timing belts use neoprene (rubber) bodies with fiberglass tensile cords. Neoprene works well for general industrial drives, but urethane outperforms neoprene in several key areas.

Property	Neoprene (Rubber)	Urethane (Polyurethane)
Chemical resistance	Moderate. Degrades with oils, solvents, some chemicals.	Excellent. Resists oils, greases, solvents, and cleaning agents.
Abrasion resistance	Good	Excellent. Outlasts neoprene in high-wear applications.
Particulate generation	Moderate. Sheds rubber particles over time.	Very low. Critical for cleanroom, pharma, and food environments.
FDA/food contact	Not typically compliant	Available in FDA 21 CFR 177.2600 and EU 10/2011 grades
Tensile cord	Fiberglass (standard)	Steel wire (near-zero stretch) or Kevlar (high flex life)
Open-end available	No (closed loop only for most profiles)	Yes. Cut to length from roll stock.
Hydrolysis resistance	Good	Moderate. Use ester-free grades for high-humidity or washdown.
Temperature range	-22°F to +185°F	-22°F to +176°F (standard); +212°F (high-temp grades)
Cost	Lower	Higher (premium for performance and compliance)

Choose urethane when the application requires food-grade compliance, chemical resistance, low particulate generation, open-end/custom lengths, or steel cord for near-zero stretch positioning. Choose neoprene for general industrial drives where none of these requirements apply and cost is a primary concern.

Urethane Timing Belt Profiles and Pitches

Urethane timing belts are manufactured in nearly every standard profile and pitch. The table below shows common profiles available in urethane construction.

Profile Family	Pitches Available in Urethane	Open-End Available	Closed-Loop Available
T-Profile (metric trapezoidal)	T2.5, T5, T10	Yes (standard)	Yes (welded endless)
AT-Profile (modified metric)	AT3, AT5, AT8, AT10, AT15, AT20	Yes (standard)	Yes (welded endless)
HTD (curvilinear)	3M, 5M, 8M, 14M	Yes	Yes
ANSI Trapezoidal	MXL, XL, L, H	Yes (MXL, XL, L common)	Yes
GT (Gates Tooth)	GT2 (2mm), GT3 (3mm, 5mm, 8mm)	Yes (GT2 very common)	Yes

T-profile and AT-profile belts are the most commonly requested urethane profiles because the European T/AT system was designed around polyurethane construction from the start. HTD and ANSI profiles are also widely available in urethane for applications that require upgrading from neoprene.

Steel Cord vs. Kevlar Cord

The tensile cord determines the belt's stretch characteristics, flex life, and suitability for specific drive types. Urethane timing belts are available with two primary cord materials.

Property	Steel Wire Cord	Kevlar (Aramid) Cord
Elongation under load	0.02% (near-zero stretch)	0.3-0.5% (low stretch)
Best for	Linear motion, precision positioning, indexing	Rotary drives with small pulleys, high flex life needed
Minimum pulley size	Larger (steel cord is stiffer)	Smaller (Kevlar flexes tighter)
Fatigue life around small pulleys	Lower (steel can fatigue with repeated tight bending)	Higher (Kevlar resists flex fatigue)
Conductivity	Conductive (may need insulation in some applications)	Non-conductive
Cost	Standard	Higher

Rule of thumb: Use steel cord for linear motion, positioning, and any application where near-zero stretch is critical. Use Kevlar cord for rotary drives with small pulleys where the belt must flex tightly and achieve long flex life.

Open-End vs. Closed-Loop Urethane Belts

Open-End (Continuous Roll)

Open-end urethane timing belts are sold in roll stock and cut to the exact length required. They are joined into a loop using mechanical connectors (finger splices, pin connectors) or heat welding. Open-end belts are the standard format for linear motion, custom center distance drives, and applications where standard closed-loop sizes are not available. See Open-End Timing Belts for more details.

Closed-Loop (Welded Endless)

Closed-loop urethane timing belts are manufactured as a continuous loop with a welded joint. They are specified by pitch length, profile, and width just like neoprene belts. Closed-loop urethane belts are used where a specific belt length is required and the joint quality of a factory weld is preferred over a field splice.

Common Urethane Timing Belt Applications

Application	Why Urethane	Typical Profile
Linear motion and positioning	Steel cord for near-zero stretch. Open-end for any length.	T5, T10, AT5, AT10, GT2
Food processing	FDA-compliant. Resists oils, fats, cleaning chemicals.	T5, T10, AT10, 5M, 8M
Pharmaceutical and medical	Low particulate. Cleanroom compatible. Chemical resistant.	T2.5, T5, MXL, AT5
Packaging machinery	Precise indexing. Steel cord registration. Chemical resistance.	T5, T10, AT5, AT10, 5M
3D printers and hobby CNC	GT2 urethane with steel cord is the standard for motion axes.	GT2 (2mm)
Semiconductor and electronics	Low outgassing. No particulate shedding. Precision motion.	T2.5, T5, AT5, MXL
Textile machinery	Replaces neoprene on European textile equipment for longer life.	T5, T10
Conveyor systems (light to medium)	Chemical resistant. Handles washdown. Open-end for custom lengths.	T10, AT10, 8M, 14M

For food-grade specific options across all profiles, see Food Grade Timing Belts. For application-specific guidance, see Timing Belts for Food Processing and Timing Belts for Linear Motion.

Urethane Timing Belt Brands We Carry

Texas Belting stocks and sources urethane timing belts from the following manufacturers. We can cross-reference part numbers and recommend the best urethane belt for your application.

Brand	Urethane Product Lines	Notes
Gates	PowerGrip urethane belts	Limited urethane range. Stronger in neoprene and Poly Chain.
Continental / ContiTech	Synchroflex (urethane), Synchrochain	Industry leader in T-profile and AT-profile urethane belts
Bando	Bando Bancollan urethane	Japanese manufacturing, precision urethane options
Diesel Belting	Diesel urethane timing belts	Cost-effective urethane replacement option
Megadyne	Megalinear, Megaflex urethane	Strongest urethane range. Open-end specialist. FDA, AT, T, HTD profiles.

Not sure which brand or material to specify? Request a quote or call 888-203-2358. We will recommend the right urethane belt for your application.

Urethane Timing Belt FAQs

What is a urethane timing belt?

A urethane (polyurethane) timing belt is a synchronous toothed belt made from a polyurethane body instead of the standard neoprene (rubber). Urethane timing belts use steel wire or Kevlar tensile cords and are available in most standard profiles and pitches. They offer superior chemical resistance, abrasion resistance, low particulate generation, and FDA food-contact compliance compared to neoprene belts.

Can I replace a neoprene timing belt with a urethane belt?

Yes, as long as the profile, pitch, length, and width match. Urethane timing belts are designed to run on the same pulleys as their neoprene counterparts. The tooth profile must be identical. For example, a neoprene T5-450-16 can be replaced with a urethane T5-450-16 on the same T5 pulleys. The urethane belt will typically cost more but provide longer service life in demanding environments.

Are urethane timing belts FDA compliant?

Many urethane timing belts are available in FDA-compliant grades that meet FDA 21 CFR 177.2600 and/or EU Regulation 10/2011 for food contact. These belts are suitable for direct and indirect food contact in food processing, packaging, and beverage equipment. Not all urethane belts are FDA compliant by default, so always specify food-grade when ordering. See Food Grade Timing Belts for more details.

What is the difference between steel cord and Kevlar cord?

Steel cord provides near-zero elongation (0.02%) and is the standard for linear motion and precision positioning. Kevlar (aramid) cord provides low elongation (0.3-0.5%) with superior flex life around small pulleys. Use steel cord for linear motion and indexing. Use Kevlar cord for rotary drives with small pulleys where high flex life is needed.

What profiles are available in urethane?

Most standard timing belt profiles are available in urethane construction. The most common include T2.5, T5, T10, AT5, AT10, MXL, XL, L, H, HTD 3M/5M/8M/14M, and GT2/GT3. T-profile and AT-profile belts are the most widely available in urethane because the European T/AT system was designed around polyurethane from the start. Contact Texas Belting for availability of specific profile and size combinations.

What is an open-end urethane timing belt?

An open-end urethane timing belt is sold in continuous roll stock rather than as a pre-made closed loop. It is cut to the exact length needed and joined into a loop using a mechanical connector (finger splice, pin connector) or heat welding. Open-end belts are the standard for linear motion, custom center distance drives, and any application where a specific non-standard length is required.

Can urethane timing belts handle washdown environments?

Yes. Urethane timing belts resist water, cleaning chemicals, and mild caustic solutions commonly used in food and pharmaceutical washdown procedures. For high-humidity or frequent washdown environments, specify ester-free (hydrolysis-resistant) polyurethane grades to ensure long-term durability. Standard polyester-based urethane can degrade with prolonged moisture exposure.

Does Texas Belting stock urethane timing belts for same-day shipping?

Yes. Common urethane timing belt profiles and sizes in stock at our Houston warehouse ship the same day when ordered before the daily cutoff. Specialty sizes, uncommon profiles, or custom-cut open-end lengths may require 3 to 7 business days. Call 888-203-2358 to confirm availability.

Need Urethane Timing Belts?

Tell us the profile, pitch, length, width, and cord type. Or send us your existing part number and we will cross-reference the urethane equivalent.

Request a Quote

888-203-2358