Purchase now: Bonfiglioli W 63 U 20 P80 B5 B3 Gearbox
Purchase now: Atlantechdrives provides you the W 63 U 20 P80 B5 B3, a highly durable, industrial-grade universal worm gear reducer engineered by the power transmission experts at Bonfiglioli. Belonging to the heavy-duty W Series, this gearbox is specifically designed to handle intense torque applications and severe radial shock loads that would easily shatter standard lightweight aluminum 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 machine frames. This specific unit is configured with a highly versatile, relatively fast 20:1 reduction ratio, making it the perfect 90-degree transmission for high-speed automated packaging lines, rapid rotary indexing mechanisms, and dynamic sorting conveyors. Designed to accept a robust IEC P80 frame electric motor via a standard B5 mounting flange, it offers a formidable blend of speed, efficiency, and uncompromising mechanical durability.
Technical Specifications of the W 63 U 20 P80 B5 B3
The W 63 series utilizes a profile-ground steel worm shaft paired with a highly wear-resistant, centrifugally cast bronze worm wheel. Because of the relatively fast 20:1 ratio, the sliding friction is optimized, resulting in a significantly higher mechanical efficiency compared to slow, high-ratio worm gears.
- Part Number: W 63 U 20 P80 B5 B3
- Gearbox Series: W (Heavy-Duty Cast Iron Worm Gear)
- Frame Size: 63 (Industrial frame)
- Housing Type: U (Universal, multi-face mounting)
- Reduction Ratio (i): 20:1 (Mid-to-fast output speed)
- Motor Interface: IEC P80 frame
- Motor Flange Type: B5 (Large standard mounting flange)
- Mounting Position: B3 (Horizontal, foot mounted)
Expert Tips: Dynamic Reversibility and Braking
Understanding mechanical holding power is absolutely vital when dealing with mid-range worm gear ratios like this one. Expert Tip: The 20:1 reduction ratio places the W 63 squarely in the category of dynamic reversibility. Because the lead angle of the internal steel worm thread must be quite steep to achieve this fast speed, the gearbox will offer virtually zero resistance to back-driving. This means that if you turn off the electric motor, any kinetic energy or heavy load attached to the output shaft will instantly back-drive the gearbox and cause the motor to spin freely backward. It will not act as a mechanical brake under any circumstances. If your application involves holding a load against gravity (like an inclined conveyor) or requires sudden, precise emergency stops, you must absolutely install an external failsafe electromechanical brake on your AC motor.
Maintenance: Thermal Expansion and Vent Plugs
Unlike smaller fractional gearboxes that are sealed for life, the heavy-duty W 63 size requires active internal pressure management. This specific gearbox is configured from the factory for the B3 mounting position (horizontal, with the mounting feet at the bottom). As the high-speed friction heats the internal synthetic ISO VG gear oil during operation, the air inside the cast-iron 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 B5 input accept?
A: A standard IEC 80 frame motor features a 19mm diameter solid shaft. The B5 flange for the 80 frame has an outer diameter of 200mm. The gearbox input quill and mounting face are perfectly matched to these standard dimensions.
Q: Can I use standard automotive gear oil in the W 63?
A: No. High-performance industrial worm gears require specific synthetic gear oil to handle the extreme pressure (EP) sliding friction and elevated operating temperatures. Using standard mineral or automotive oil will cause rapid overheating and premature bronze wheel failure.
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