Double / Hexagonal V-Belt, also known as double-sided V-belt, is a special high-performance transmission belt with symmetric hexagonal cross-section, which is equivalent to two ordinary V-belts bonded together at the center by a strong cord core. In line with GB/T 13575.1-2022 standard and ISO international specifications, its cross-section is hexagonal, with V-shaped grooves on both the top and bottom, enabling power transmission from both sides. It is made of high-quality chloroprene rubber (CR), EPDM or special oil-resistant synthetic rubber as the base material, reinforced with high-strength polyester, aramid or fiberglass cords, and the surface is covered with wear-resistant and antistatic fabric. Widely used in industrial snake-shaped transmission, automotive auxiliary systems, agricultural machinery, textile machinery, and multi-shaft transmission equipment, it is especially suitable for scenarios where the drive shaft needs relative rotation and multi-directional power transmission, realizing efficient and stable power transmission
Double / Hexagonal V-Belt, also known as double-sided V-belt, is a special high-performance transmission belt with symmetric hexagonal cross-section, which is equivalent to two ordinary V-belts bonded together at the center by a strong cord core. In line with GB/T 13575.1-2022 standard and ISO international specifications, its cross-section is hexagonal, with V-shaped grooves on both the top and bottom, enabling power transmission from both sides. It is made of high-quality chloroprene rubber (CR), EPDM or special oil-resistant synthetic rubber as the base material, reinforced with high-strength polyester, aramid or fiberglass cords, and the surface is covered with wear-resistant and antistatic fabric. Widely used in industrial snake-shaped transmission, automotive auxiliary systems, agricultural machinery, textile machinery, and multi-shaft transmission equipment, it is especially suitable for scenarios where the drive shaft needs relative rotation and multi-directional power transmission, realizing efficient and stable power transmission
l Double-Sided Transmission & Flexible Application:
The unique hexagonal cross-section with V-grooves on both sides allows it to transmit power from either the top or bottom, adapting to multi-shaft, reverse rotation and snake-shaped transmission scenarios. It can replace two ordinary V-belts, simplifying the transmission structure and reducing installation space.
l Uniform Load Distribution & Low Wear:
The symmetric design ensures uniform load distribution on both sides of the belt, avoiding uneven wear caused by one-sided force. The cord core is firmly bonded to the belt body, which can evenly distribute bending stress, reduce cord aging, and effectively extend the service life.
l Strong Load-Bearing & Stable Transmission:
Reinforced with high-strength cords, it has excellent tensile strength and anti-deformation performance, can bear high torque and long-term high-speed operation, and has low elongation rate during operation. The optimized V-groove design increases the contact pressure with the pulley, reduces slipping, and ensures stable transmission.
l Oil & High-Temperature Resistance:
Adopting special synthetic rubber materials and wear-resistant fabric covering, it meets RMA oil-resistant and high-temperature standards, and has antistatic performance. It can adapt to harsh working environments with oil pollution and temperature changes, avoiding rubber aging and cord corrosion[2][3].
l Energy-Saving & Cost-Effective:
The smooth surface and reasonable structure reduce friction and energy loss during operation, improving transmission efficiency (up to 94%-97%). It can replace two ordinary V-belts, reducing maintenance frequency and overall use cost, and extending the average fault interval.
Model | Section Type | Top Width (mm) | Belt Thickness (mm) | Pitch Length (mm) | Max Power (kW) | Max Linear Speed (m/s) | Min Pulley Diameter (mm) | Working Temperature (℃) |
D-AA | AA | 13 | 10.5 | 600-1200 | 46160 | 18-23 | 38 | -25~115 |
D-BB | BB | 17 | 14 | 700-2200 | 15-45 | 16-21 | 50 | -25~115 |
D-CC | CC | 22 | 18 | 1200-3200 | 40-110 | 14-19 | 63 | -25~115 |
D-DD | DD | 32 | 25 | 1500-3800 | 100-180 | 46373 | 80 | -25~115 |
D-EE | EE | 38 | 30 | 2000-4500 | 160-250 | 46310 | 100 | -25~115 |
D-9N | 9N | 9.5 | 8.5 | 650-1400 | 46128 | 20-24 | 32 | -25~115 |
Maintenance Tips:
l Replacement Cycle: Replace every 40,000-70,000 km (for automotive applications) or 1800-2800 operating hours (for industrial equipment); shorten the cycle by 30% under high temperature, high load, frequent start-stop or oil-contaminated working conditions. When replacing, use the same specification model, and do not mix new and old belts or different types of V-belts.
l Tension Standard: The initial tension should be controlled at 19-27N/mm of belt width; for belts with center distance ≤ 700mm, the deflection should be 1.4%-1.9% of the center distance. For new belts, considering the initial elongation rate, re-tighten once after running for 72 hours under the allowable performance range. The appropriate tension can be checked by the method of rotating the belt 90 degrees with one hand, and the belt speed should be controlled within 15-20m/s.
l Environmental Requirements: Avoid long-term contact with engine oil, gasoline, coolant, acid, alkali and other corrosive substances; the recommended working temperature is -25℃~115℃, and avoid continuous operation at temperatures exceeding 125℃. Keep the belt and pulley groove clean and free of oil, dust and debris to prevent abnormal wear.
l Regular Inspection: Check the belt surface, cord and pulley groove every 700 operating hours; replace immediately if there are cracks, wear (exceeding 12%), cord exposure, rubber hardening or delamination. At the same time, check the parallelism of the pulley axis and the coincidence of the pulley groove symmetry plane, with the deviation β≤20’ and l≤1.6a/1000. The minimum pulley diameter should comply with the standard to avoid excessive bending of the belt.
l Installation & Usage: When installing, loosen the motor fixing bolts and slide rail adjusting screws to reduce the center distance, and do not forcibly pry the belt into the pulley groove to avoid damaging the belt body. After installation and adjustment, fasten the motor connecting bolts and slide rail adjusting screws. Install a protective cover to ensure operation safety; loosen the belt when parking for a long time, and avoid excessive bending or extrusion of the belt.

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