Purchase now: Bonfiglioli W 75 U 40 P80 B14 B3 Gearbox
Purchase now: Atlantechdrives provides you the W 75 U 40 P80 B14 B3, a rugged, heavy-duty universal worm gear reducer expertly engineered by the global power transmission specialists at Bonfiglioli. Belonging to the highly robust W Series, this gearbox is specifically designed to handle intense industrial torque applications, heavy duty cycles, and severe radial shock loads that would easily shatter standard lightweight fractional drives. The «U» designation stands for a Universal unibody cast-iron housing, precision-machined on multiple geometric faces to provide unmatched mounting flexibility in complex industrial machine frames. This specific unit is configured with a versatile 40:1 reduction ratio, making it the perfect 90-degree transmission for heavy-duty material handling, continuous sorting conveyors, inclined lifts, and dynamic industrial mixing vats requiring substantial torque multiplication. Designed to seamlessly accept a robust IEC P80 frame electric motor via a compact B14 face-mount flange, it offers a formidable blend of power density, spatial efficiency, and uncompromising mechanical durability.
Technical Specifications of the W 75 U 40 P80 B14 B3
The W 75 series utilizes a profile-ground steel worm shaft paired with a highly wear-resistant, centrifugally cast bronze worm wheel. This heavy-duty metallurgical combination ensures optimal sliding friction, drastically reducing operating noise and extending the lifespan under brutal 24/7 operations.
- Part Number: W 75 U 40 P80 B14 B3
- Gearbox Series: W (Heavy-Duty Cast Iron Worm Gear)
- Frame Size: 75 (Medium-heavy industrial frame)
- Housing Type: U (Universal, multi-face mounting)
- Reduction Ratio (i): 40:1 (Mid-to-high ratio)
- Motor Interface: IEC P80 frame
- Motor Flange Type: B14 (Compact face mount)
- Mounting Position: B3 (Horizontal, foot mounted)
Expert Tips: The Edge of Static Irreversibility
Understanding mechanical holding power is absolutely vital when dealing with mid-range worm gear ratios like the 40:1. Expert Tip: The 40:1 reduction ratio places the W 75 precisely on the threshold of static irreversibility (self-locking). In ideal, stationary conditions, the internal friction angle is steep enough that the gearbox will hold a static load without back-driving when the electric motor is turned off. However, in the real world of industrial automation, sudden machine vibrations, mechanical shocks, or a rise in operating temperature (which thins the synthetic gear oil) can temporarily break this static friction. If this happens, the load will suddenly back-drive the motor. Therefore, if your application involves an inclined safety conveyor or a suspended vertical load, you must not rely solely on this 40:1 worm gear as a fail-safe mechanical brake. You must install an external electromechanical brake on your AC motor.
Maintenance: Thermal Expansion and Vent Plugs
Unlike smaller fractional aluminum gearboxes that are sealed for life, the heavy-duty W 75 cast-iron size requires active internal pressure management. This specific gearbox is configured from the factory for the B3 mounting position (horizontal, with the integral mounting feet at the bottom). As the sliding friction heats the internal synthetic ISO VG gear oil during operation, the air inside the rigid housing expands. To prevent this expanding pressure from blowing out the critical input and output rubber oil seals, Bonfiglioli installs a breather/vent plug at the highest point of the gearbox based strictly on this B3 orientation. If you alter your machine design and mount this gearbox vertically, you must physically relocate the vent plug to the new highest port.
Frequently Asked Questions (FAQs)
Q: What size motor shaft does the P80 B14 input accept?
A: A standard IEC 80 frame motor features a 19mm diameter solid shaft. The B14 face-mount flange for the 80 frame has an outer diameter of 120mm. The gearbox input quill and mounting face are perfectly matched to these standard IEC dimensions.
Q: Can I use standard automotive gear oil in the W 75?
A: No. High-performance industrial worm gears require specific synthetic gear oil (typically ISO VG 320) to handle the extreme pressure (EP) sliding friction and elevated operating temperatures. Using standard mineral or automotive oil will cause premature bronze wheel failure.
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