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How to choose the right PU timing belt for packaging machines?
KEY TAKEAWAY
Select a PU timing belt by matching tooth profile (T/AT/ATL), pitch size, belt width, and tensile cord type to your machine speed, load, cleanliness requirements, and operating environment.
Polyurethane (PU) timing belts are widely preferred in packaging machinery due to abrasion resistance, chemical stability, and lubrication-free operation. Selection requires systematic evaluation of five key parameters:
Step 1: Choose the Tooth Profile
| Profile | Sizes | Best Application | Max Speed |
|---|---|---|---|
| T-Profile (Trapezoidal) | T2.5, T5, T10, T20 | Positioning and conveying at moderate speeds | under 10 m/s |
| AT-Profile (Asymmetric) | AT5, AT10, AT20 | Bidirectional drives, high torque | under 10 m/s |
| ATL-Profile | ATL5, ATL10 | Extended tooth engagement, extreme loads | under 10 m/s |
Step 2: Match Pitch Size to Speed
| Pitch (mm) | Max Speed (m/s) | Typical Packaging Application |
|---|---|---|
| T2.5 | 24 | Small component feeders, labeling heads |
| T5 | 45 | Carton erectors, labeling machines |
| T10 | 60 | Palletized conveyor drives, case packers |
| AT10 | 55 | High-torque indexing tables, filling machines |
Step 3: Select the Tensile Cord
| Cord Type | Strength | Stretch | Ideal For |
|---|---|---|---|
| Steel | >2000 N/cm | Zero | Servo-driven lines, high-precision positioning |
| Aramid (Kevlar) | High | Minimal | Intermittent motion, shock absorption |
| Stainless Steel | >2000 N/cm | Zero | Washdown environments, corrosion resistance |
Step 4: Verify Cleanliness and Compliance
For food and pharmaceutical packaging, PU belts must meet regulatory standards. GOODLY Belts offers:
- Blue PU belts - Metal-detectable, ideal for food processing zones
- White PU belts - FDA / EC 1935/2004 compliant for direct food contact
- Antimicrobial additives - Available for hygiene-critical zones
- Full traceability - Batch testing and material certificates included
Step 5: Consider Custom Features
- Backside profiles - Diamond or herringbone patterns for improved grip on driven rollers
- Guide strips - K13, K6, or customized trapezoidal profiles to prevent lateral drift
- Custom coatings - Anti-static, oil-resistant, or high-friction surface treatments
SUCCESS STORY: Beverage Packaging Plant
A beverage packaging plant using GOODLY Belts T10-Steel PU timing belts on their carton forming machines achieved remarkable improvements:
+30%
Line Speed (240 to 312 cartons/min)
0.2 mm
Positioning Accuracy
6 Months
Validated Continuous Operation
Related Questions
- What is a timing belt and how does it work in power transmission systems?
- What are the advantages of rubber timing belts over other belt types?
- What is the difference between steel and aramid tensile cords?
- How to maintain PU timing belts in high-speed packaging lines?
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