
The TD75 Belt Conveyor Trough Idler and Impact Idler are essential components designed for efficient and reliable bulk material handling in mining machinery. As part of the TD75 conveyor system, standardized in 1975, these idlers support and guide the conveyor belt, ensuring smooth operation and minimizing material spillage.
Trough idlers shape the belt into a trough to handle high-capacity loads, while impact idlers absorb shock at loading points to protect the belt. Widely used in mining, metallurgy, ports, and construction, these idlers are engineered for durability in harsh environments. This product page provides a detailed overview of their features, applications, installation guidelines, customer feedback, and answers to common questions, optimized to assist mining professionals in enhancing conveyor performance.
Unit: mm| B | A | L | E | H | H1 | D | P | Q | d | J | Rolling bearing model | Drawing No. of groove shaped roller | Drawing No. of spring plate buffer roller | Drawing No. of rubber ring type buffer roller |
| 500 | 720 | 190 | 760 | 210 | 170 | 89 | 170 | 130 | M12 | 270 | 204 | TD1C1 | TD1C7 | TD1C9 |
| 650 | 870 | 240 | 910 | 230 | 295 | TD2C1 | TD2C7 | TD2C9 | ||||||
| 800 | 1070 | 305 | 1110 | 240 | 330 | TD3C1 | TD3C7 | TD3C9 | ||||||
| 1000 | 1300 | 375 | 1350 | 300 | 210 | 108 | 220 | 170 | M16 | 400 | 305 | TD4C1 | TD4C7 | TD4C9 |
| 1200 | 1550 | 455 | 1610 | 330 | 230 | 260 | 200 | 460 | TD5C1 | TD5C7 | TD5C9 | |||
| 1400 | 1750 | 525 | 1810 | 350 | 495 | TD6C1 | TD6C7 | TD6C9 |
The TD75 Trough Idler and Impact Idler are designed to enhance conveyor system performance, offering features that ensure durability, efficiency, and safety.
Trough-Shaped Design
Consists of a central idler roll and two wing idlers at angles of 20°, 35°, or 45° to form a trough, supporting high-capacity loads.
Maintains consistent belt shape to prevent material spillage.
High-Strength Materials
Idler tube made from Q235 steel (equivalent to SS400/ASTM A36) for durability.
Shaft constructed from 45# steel (equivalent to DIN C45/ASTM A1045) for reliable performance.
Precision Bearings
Equipped with deep groove ball bearings (C3 clearance, 2RZ/2Z seals) for low friction and long life.
Multi-stage labyrinth seals prevent dust and moisture ingress.
Low Vibration and Noise
Precision manufacturing ensures static and dynamic balance for smooth operation.
Reduces wear on the belt and conveyor frame.
Customizable Configurations
Available in diameters from 50mm to 219mm and lengths from 190mm to 3400mm to suit various belt widths (500mm to 2400mm).
Custom trough angles and bracket designs available.
Shock-Absorbing Design
Fitted with rubber or composite shock-absorbing rings to cushion heavy material impacts at loading points.
Minimizes belt damage and extends service life.
Corrosion Resistance
High-polymer materials or rubber coatings provide corrosion and flame-retardant properties, ideal for coal and chemical plants.
Robust Construction
Heavy-gauge or seamless steel tubing for enhanced strength under high-impact loads.
Reinforced brackets for stability in demanding environments.
Self-Cleaning Properties
Rubber rings or discs prevent material buildup, reducing maintenance needs.
Anti-static and lightweight design for safe operation.
Standards Compliance
Meets TD75, DTII, and ISO 9001 standards for quality and safety.
Tested for radial runout and axial movement to ensure reliability.
Proper installation of the TD75 Bend Pulley ensures optimal belt tracking and system performance. Follow these steps for a successful setup:
Pre-Installation Checks
Verify pulley specifications (diameter, shaft size, lagging type) match conveyor requirements.
Inspect the conveyor frame for alignment and structural integrity.
Positioning
Install the bend pulley at the appropriate location to change belt direction or increase the wrap angle around the drive pulley.
Ensure the pulley is aligned with the conveyor frame to prevent belt mistracking.
Shaft and Bearing Installation
Secure the shaft to the conveyor frame using integral or split bearing seats, depending on the design.
Verify bearing alignment to minimize friction and wear.
Belt Tension Adjustment
Adjust the bend pulley position to achieve the desired wrap angle and belt tension.
Use the formula for belt tension:[ T = \frac{P_p \cdot 1000}{v} ] where (T) is belt tension (N), (P_p) is power (kW), and (v) is belt speed (m/s).
Lagging Verification
Ensure lagging is securely bonded to the pulley surface to prevent slippage.
For replacement, remove old lagging completely before applying new material.
Final Inspection
Check alignment, tension, and secure mounting.
Run the conveyor at low speed to confirm smooth belt redirection before full operation.
Use trained technicians to comply with safety standards.
Document installation parameters for maintenance records.
Contact us for expert installation guidance.
Regular maintenance ensures the TD75 Bend Pulley’s longevity and performance:
Inspections: Check lagging, shaft, and bearings every 3-6 months for wear.
Lubrication: Apply grease to bearings as recommended to reduce friction.
Belt Cleaning: Use belt scrapers to prevent material buildup on the pulley.
Tension Monitoring: Verify belt tension to avoid slippage or excessive strain.
Quality Spare Parts: Use OEM parts compliant with TD75 standards for repairs.


| Roller type | Speed (m/s) | Belt width(mm) | Roller type | Speed (m/s) | Belt width(mm) | ||||||||||
| 500 | 650 | 800 | 1000 | 1200 | 1400 | 500 | 650 | 800 | 1000 | 1200 | 1400 | ||||
| Capacity Q(t/h) | Capacity Q(t/h) | ||||||||||||||
| Trough roller | 0.8 | 78 | 131 | ― | ― | ― | ― | Parallel roller | 0.8 | 41 | 67 | 118 | ― | ― | ― |
| 1 | 97 | 164 | 278 | 435 | 655 | 891 | 1 | 52 | 88 | 147 | 230 | 345 | 469 | ||
| 1.25 | 122 | 206 | 348 | 544 | 819 | 1115 | 1.25 | 66 | 110 | 184 | 288 | 432 | 588 | ||
| 1.6 | 156 | 264 | 445 | 696 | 1048 | 1427 | 1.6 | 84 | 142 | 236 | 368 | 553 | 753 | ||
| 2 | 191 | 323 | 546 | 853 | 1284 | 1748 | 2 | 103 | 174 | 289 | 451 | 677 | 922 | ||
| 2.5 | 232 | 391 | 661 | 1033 | 1556 | 2118 | 2.5 | 125 | 211 | 350 | 546 | 821 | 1117 | ||
| 3.15 | ― | ― | 824 | 1233 | 1858 | 2528 | 3.15 | ― | ― | ― | ― | ― | ― | ||
| 4 | ― | ― | ― | ― | 2202 | 2996 | 4 | ― | ― | ― | ― | ― | ― |
The TD75 Trough and Impact Idlers have earned praise from mining professionals for their reliability and performance:
Shanxi Coal Mining Co., China
“The TD75 Trough and Impact Idlers from [Your Company Name] transformed our conveyor system. Spillage dropped significantly, and the impact idlers protected our belts from heavy coal drops.” – Zhang Wei, Operations Manager
Australian Iron Ore Mine
“These idlers handle high-capacity loads effortlessly. The trough design ensures stability, and the impact idlers have extended our belt life by months.” – Sarah Thompson, Site Engineer
South African Port Terminal
“The corrosion-resistant impact idlers perform flawlessly in our coastal environment. Maintenance costs are down, and [Your Company Name]’s support is top-notch.” – Jacob Mthembu, Logistics Coordinator
Indonesian Copper Mine
“The TD75 Trough Idlers improved our conveyor efficiency by 15%. The customizable options were a perfect fit for our system.” – Putra Santoso, Maintenance Supervisor
These testimonials reflect [Your Company Name]’s commitment to quality and customer satisfaction.
Below are answers to common questions, incorporating long-tail keywords for SEO:
1. What are TD75 Trough and Impact Idlers?
Trough idlers form a trough to support the conveyor belt and load, while impact idlers absorb shock at loading points, used in mining and other industries.
2. How do I select the right trough angle for my conveyor?
Choose 20°, 35°, or 45° based on material type and load. Larger angles suit loose materials. Consult [Your Company Name] for guidance.
3. What materials are used in TD75 idlers?
Q235 steel for tubes, 45# steel for shafts, and rubber/composite for impact idler rings, ensuring durability and corrosion resistance.
4. How often should I maintain TD75 idlers?
Inspect every 3-6 months, lubricate bearings, and clean to prevent buildup.
5. Can TD75 idlers be customized?
Yes, we offer tailored diameters, lengths, and trough angles. Contact us for custom solutions.
6. Which industries use TD75 Trough and Impact Idlers?
Mining, metallurgy, ports, construction, and power plants for bulk material handling.
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Luotuo Industrial Area, Zhenhai District, Ningbo City, China
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