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High Precision
Arc Tooth Timing Belts
Arc-tooth (AT) profile belts engineered for the highest positioning precision in CNC, semiconductor, and medical motion-control systems.
AT Profile · Sub-Millimeter Positioning Accuracy
Temperature Range -20°C ~ +100°C
Related Products
Explore our range of heavy-duty timing belts designed for various industrial needs.
High Precision Arc Tooth Timing Belts — Engineered for Excellence
Our high precision arc tooth timing belts use the AT (Arc Tooth) profile — a rounded tooth geometry engineered specifically for motion-control applications where sub-millimeter positioning accuracy and minimal backlash matter more than raw torque capacity. Widely specified in CNC machining centers, semiconductor handling equipment, and medical diagnostic devices, AT-profile belts represent the precision end of the timing belt spectrum.
Material & Construction
The AT tooth form combines a rounded tooth tip with a wider tooth base than either classical trapezoidal or standard HTD profiles, engineered specifically to minimize backlash during direction reversal — a critical requirement in servo-driven positioning axes. Tension members use high-modulus steel wire or fiberglass cord depending on load class, embedded in a polyurethane body chosen for its dimensional stability and low creep under precision positioning duty cycles.
Design & Performance
The arc tooth geometry's wider base reduces tooth deflection under load, directly translating into tighter positioning repeatability across thousands of reversal cycles — the defining requirement of servo axis drives. Backlash is held to industry-leading tolerances, and the tooth form is optimized to minimize noise at the high accelerations typical of pick-and-place and CNC feed-axis applications.
Manufacturing Excellence
Manufactured under ISO 9001 quality management with tooth geometry verified by coordinate measuring equipment on every production batch — a level of dimensional control beyond standard visual or gauge inspection. Backlash testing is performed on representative pulley pairs to confirm positioning accuracy specifications before belts are released for shipment.
Customization & Flexibility
Available in the AT5, AT10, and AT20 pitch range with reduced-backlash grades for the most demanding servo positioning axes. Custom perforated backs are available for linear encoder strip mounting, a common requirement in high-precision motion stages.
Applications Across Industries
Our high precision arc tooth timing belts are deployed in:
- CNC Machining Centers – feed-axis and tool-changer positioning drives.
- Semiconductor Equipment – wafer handling and stage positioning.
- Medical Devices – precision diagnostic and surgical robotic axes.
- Metrology Equipment – coordinate measuring machine axes.
- Laser Processing Systems – high-speed, high-accuracy gantry drives.
- Electronics Assembly – pick-and-place machine axis drives.
When positioning accuracy is the specification that determines whether a part passes or fails, arc-tooth belt precision is not a luxury — it's the requirement. Precision motion, engineered to hold.
Built for Performance
Every belt is designed to deliver exceptional durability, precision, and efficiency across a wide range of high precision arc tooth timing belts applications.
Minimal Reversal Backlash
Wider tooth base geometry minimizes play during direction reversal cycles.
Sub-Millimeter Repeatability
Reduced tooth deflection under load supports tight positioning tolerances.
High-Acceleration Stability
Tooth form optimized for the rapid accelerations of servo-driven axes.
CMM-Verified Tooth Geometry
Coordinate measuring equipment confirms dimensional accuracy on every batch.
Core Technical Advantages
Beyond standard specifications, our belts incorporate engineering innovations that deliver superior performance.
Arc Tooth (AT) Profile Geometry
Rounded tooth tip with wider base specifically engineered to minimize backlash.
Reduced-Backlash Grades
Special production grades available for the most demanding servo positioning axes.
Low-Creep Polyurethane Body
Dimensionally stable compound resists drift under precision positioning duty cycles.
Backlash-Tested Pulley Pairs
Every batch validated on representative pulley pairs before release.
Technical Specifications
Standard and heavy-duty series — select the right belt for your drive system.
| Model | Pitch Type | Width (mm) | Tensile Member | Backlash (arc-min) | Temp. Range |
|---|---|---|---|---|---|
| AT5-600 | AT5 | 12 | Fiberglass | < 8 | -20 ~ +95 |
| AT10-800 Popular | AT10 | 16 | Fiberglass | < 6 | -20 ~ +100 |
| AT10-1000 Popular | AT10 | 20 | Steel | < 5 | -20 ~ +100 |
| AT10-1400 Precision | AT10 | 25 | Steel | < 4 | -20 ~ +100 |
| AT20-2000 Precision | AT20 | 32 | Steel | < 4 | -15 ~ +100 |
* Reduced-backlash precision grades available for servo positioning axes.
Performance Data
Visual insights into load capacity, precision, and operating characteristics.
Maximum Load Capacity (N)
Backlash vs. Tooth Profile Type
Positioning Repeatability vs. Cycle Count
Load vs. Belt Width (AT10)
About Us
The company is China High Precision Arc Tooth Timing Belts Manufacturers and Wholesale High Precision Arc Tooth Timing Belts Factory, and was established in 1992, specializing in the production of rubber timing belts, V-ribbed belts, open belts and timing pulleys. The company now has the factory covering an area of 32,000 square meters , with an annual output of 120 million pieces and an output value of 200 million yuan. The company is a national high-tech enterprise, the drafting unit of national standards and industry standards, and has passed ISO9001, ISO14001 and ISO45001 system certification.
Contact Us
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1992
Company was established in
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32000
Factory covers an area(㎡)
-
6000+
Number of Molds
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120 Million
Annual production capacity
Why Choose Us
Decades of engineering excellence in power transmission.
- In-house R&D with 40+ years of belt technology expertise
- Strict quality control — every belt tested to ISO standards
- Custom solutions: length, width, and material options
- Global supply chain with fast lead times
Field reliability rate
Based on 5-year performance data across 12,000+ installations worldwide.
Key Applications
Trusted by engineers across industries for reliable, maintenance-free power transmission.
CNC Machining Centers
feed-axis and tool-changer positioning drives
Semiconductor Equipment
wafer handling and stage positioning
Medical Devices
precision diagnostic and surgical robotic axes
Metrology Equipment
coordinate measuring machine axes
Laser Processing Systems
high-speed, high-accuracy gantry drives
Electronics Assembly
pick-and-place machine axis drives
Product Application What We Offer
Industry Case Studies
Real-world applications demonstrating the reliability and performance of our belts.
5-Axis CNC Machining Center
Delivered feed-axis positioning accuracy meeting tight tolerance requirements for aerospace component machining.
±0.01mm repeatabilitySemiconductor Wafer Stage
Provided low-backlash axis drive for a wafer handling robot operating in a cleanroom environment.
5M+ reversal cyclesSurgical Robotic Axis
Supplied a compact, precision drive belt for a minimally invasive surgical robotic instrument axis.
Sub-millimeter accuracyLaser Cutting Gantry
Enabled high-speed, high-accuracy gantry motion for a large-format laser cutting system.
3 m/s at ±0.02mmQuality & Certifications
Our commitment to quality is backed by internationally recognized standards and rigorous in-house testing.
Our Certificate
Intellectual Property Certificate
Certificate of integration of industrialization and industrialization
National Product and Service Quality Integrity Demonstration Enterprise
National quality inspection stable qualified products
National rubber transmission belt industry quality brand
Zhejiang Province Credit Management Demonstration Enterprise
International Standard Machinery Industry Third Prize
ISO9001 System Certification
ISO45001 System Certification
ISO14001 System Certification
Second prize
Industry advanced
Custom Solutions
We offer tailored belts to meet your unique application requirements. Contact our engineering team for a quote.
AT Pitch Range
AT5, AT10, and AT20 available
Reduced-Backlash Grades
Precision grades for servo axes
Perforated Backs
For linear encoder strip mounting
Custom Widths
10mm up to 50mm
Tensile Member Choice
Fiberglass or steel cord
Custom Lengths
150mm to 8,000mm
Installation & Maintenance Tips
Proper installation and routine maintenance maximize belt life and drive reliability.
Installation Best Practices
- Align pulleys with extra care — precision applications amplify the effect of minor misalignment.
- Set tension precisely per AT-profile charts; both under- and over-tensioning degrade positioning accuracy.
- Verify pulley tooth profile is genuine AT geometry, not a similar-looking trapezoidal profile.
- Inspect for any surface contamination before installation in cleanroom or precision environments.
- Confirm encoder or feedback device alignment if using perforated-back belt variants.
Maintenance & Inspection
- Monitor positioning accuracy trends over time to catch gradual backlash increase early.
- Re-verify tension after initial run-in, as even small tension drift affects precision performance.
- Keep belts free of particulate contamination in cleanroom or semiconductor environments.
- Inspect tooth tips for rounding or wear that can increase backlash over the service life.
- Replace proactively in precision applications rather than waiting for visible failure.
Frequently Asked Questions
Find answers to the most common questions about our high precision arc tooth timing belts.
Do you have a question? Feel free to contact!
Tel: +86-0574-62498188 62497298
Fax: +86-0574-62497297
E-mail: 
Add: No. 65, Middle Jinniu Road, Moushan Town, Yuyao City, Zhejiang Province, ChinaCopyright © Ningbo GUL TZ Rubber Belt Co., Ltd. All rights reserved.
Wholesale High Precision Arc Tooth Timing Belts Manufacturers
