Purchase now: Bonfiglioli A 20 2 UH 40 P80 B5 Gearbox
Purchase now: Atlantechdrives provides you the A 20 2 UH 40 P80 B5, a premium orthogonal (right-angle) helical-bevel gear reducer engineered by the industry leaders at Bonfiglioli. Belonging to the highly acclaimed A Series, this gearbox is the absolute pinnacle of power transmission efficiency. Unlike traditional worm gears that lose up to 30% of their motor power to sliding friction and heat, the helical-bevel architecture of the A 20 transfers over 95% of the input torque directly to the output shaft. Featuring a 2-stage reduction design with a precise 40:1 ratio, a Universal Hollow (UH) output shaft, and compatibility with a standard IEC P80 B5 electric motor, this unit is the ultimate solution for heavy-duty conveyors, industrial mixers, and packaging lines where maximizing energy efficiency and continuous 24/7 operation are mandatory requirements.
Technical Specifications of the A 20 2 UH 40 P80 B5
The A 20 series features a highly rigid unibody cast-iron housing designed to withstand extreme shock loads and harsh environmental conditions. The gears are case-hardened and meticulously ground to ensure a perfectly silent, vibration-free power transfer.
- Part Number: A 20 2 UH 40 P80 B5
- Gearbox Series: A Series (Orthogonal Helical-Bevel)
- Frame Size: 20
- Number of Stages: 2 (Dual reduction gearing)
- Reduction Ratio (i): 40:1
- Output Configuration: UH (Universal Hollow Shaft with keyway)
- Motor Interface: IEC P80 frame
- Motor Flange Type: B5 (Large standard mounting flange)
Expert Installation Advice: Hollow Shaft Anti-Seize Protocol
Connecting a machine to a hollow shaft gearbox requires strict mechanical hygiene. Expert Tip: When sliding your driven machine’s solid steel shaft into the UH (Universal Hollow) bore of the A 20 gearbox, you must account for «fretting corrosion.» Over thousands of hours of operation, microscopic vibrations cause the steel surfaces to rub, creating a rust-like powder that essentially cold-welds the two shafts together. When you eventually need to remove the gearbox for maintenance years later, it will be permanently stuck, often requiring a blowtorch or a hydraulic press to separate. To prevent this costly disaster, you must thoroughly coat the solid machine shaft and the internal keyway with a high-quality Molybdenum Disulfide (MoS2) anti-seize assembly paste before sliding the gearbox into place.
Maintenance and Overhung Load Management
Although helical-bevel gearboxes are incredibly robust, their internal bearings can be destroyed by improper mounting. If you are using the hollow shaft to drive a cantilevered load, or if you adapt it to a solid shaft with a chain sprocket, you must carefully calculate the Overhung Load (Radial Force). Always mount sprockets or pulleys as close to the gearbox housing as physically possible to minimize the leverage effect on the bearings. Periodically check the exterior seals for any signs of synthetic oil weeping, as a dry running helical gear will destroy itself in minutes under heavy loads.
Frequently Asked Questions (FAQs)
Q: Why choose an A-Series Helical-Bevel over a VF-Series Worm Gear?
A: The A-Series is vastly more energy-efficient and runs significantly cooler. While a worm gear is cheaper upfront, the electrical savings and extended lifespan of a helical-bevel gearbox provide a much lower Total Cost of Ownership (TCO) for continuous duty cycles.
Q: Can I mount this gearbox vertically?
A: Yes, but the internal lubrication splash dynamics change based on the mounting position. Ensure you specify the correct mounting orientation so the factory oil level and breather plug positions are correct.
Do you need more references from this brand? Explore our full catalog of Bonfiglioli here.
For comprehensive power transmission systems, this robust helical bevel gearbox can be effectively paired with a reliable power source like the BN 63A 4 230/400-50 IP55 asynchronous electric motor to ensure steady torque.
