Purchase now: Bonfiglioli W 75 U 15 P90 B5 B3 Universal Gear Unit
Atlantechdrives provides you the W 75 U 15 P90 B5 B3, part of the high-performance «W» (Universal) series from Bonfiglioli. This gearbox is designed for applications requiring high torque density and a robust housing that can withstand the rigors of heavy industrial environments. The W series bridges the gap between the compact VF units and heavy-duty industrial drives, offering a cubic shape that allows for universal mounting on all six faces.
- Series: W (Universal Worm Gear)
- Size: 75 (Medium-heavy duty frame)
- Ratio: 15:1
- Input Flange: P90 (IEC 90 motor compatibility)
- Mounting: B5 (Flange) and B3 (Feet) / Universal U
- Gears: Hardened steel worm and specialized bronze wheel
- Lubrication: High-grade synthetic oil pre-filled
Technical deep dive: The W Series Advantage
The Bonfiglioli W 75 U 15 P90 B5 B3 represents a significant step up in mechanical strength. The housing is typically made of high-strength cast iron (or advanced alloys depending on the specific batch), providing extreme structural rigidity. This rigidity is essential for maintaining gear alignment under the high radial loads common in large-scale mixing and conveyor applications. The 15:1 ratio is achieved through precision-ground helical-worm geometry, which optimizes the contact area between the teeth for maximum torque transmission. The P90 input flange is designed for high-power motors, ensuring that the input shaft can handle the startup torque without deflection. The universal mounting (U) capability means this gearbox can be adapted to legacy machine designs without the need for expensive custom brackets.
Expert Tips for High-Torque Gearbox Operation
For high-torque units like the W 75, lubrication film strength is the most critical factor. We recommend using synthetic lubricants with Extreme Pressure (EP) additives. If the gearbox is operating in an environment with high ambient temperatures, consider installing an external cooling fan or a specialized heat sink kit. Alignment of the output shaft is non-negotiable; even a 0.2mm deviation can induce a bending moment that will destroy the output bearings and seals within months. Always use a torque wrench to tighten the B5 flange bolts to ensure the housing is not under uneven tension.
Series Continuity and Industrial Integration
The W 75 U 15 P90 B5 B3 is designed to provide series continuity across your facility. By using the W series for your main drives and the VF 30 series for auxiliary lines, you standardize your maintenance tools and lubricant requirements. This unit is perfectly matched for motors like the BE71B4 5 or BN 80A 4 when utilized in multi-stage reduction or as part of a synchronized drivetrain ecosystem. Maintaining a unified Bonfiglioli drive train ensures that your technical team can troubleshoot more effectively and reduces the complexity of your spare parts inventory.
FAQs
Q: What does the ‘U’ designation stand for in the W 75?
A: It stands for ‘Universal’, meaning the gearbox housing is designed with mounting holes on multiple sides, allowing it to be installed in any orientation.
Q: What is the maximum torque capacity of the W 75?
A: The nominal torque depends on the input speed, but the W 75 is designed for the medium-heavy torque range, typically exceeding the capacity of standard aluminum-frame reducers.
Do you need more references from this brand? Explore our full catalog of Bonfiglioli here.
For continuous industrial operations requiring maximum efficiency, this universal worm gearbox pairs perfectly with the high-reliability BN 80A 4 230/400-50 IP55 asynchronous electric motor.
