Purchase now: Bonfiglioli A 30 2 NH 20 P90 B5 Gearbox
Purchase now: Atlantechdrives provides you the A 30 2 NH 20 P90 B5, a premier orthogonal (right-angle) helical-bevel gear reducer engineered by the power transmission experts at Bonfiglioli. Belonging to the elite A Series, this gearbox delivers unmatched mechanical efficiency and rugged durability for demanding industrial automation. Unlike traditional worm gears, the helical-bevel design of the A 30 ensures that over 95% of your electric motor’s power is transferred directly to the output, virtually eliminating the energy lost to radiant heat. This specific model features a 2-stage reduction resulting in a precise 20:1 ratio. It is designed to seamlessly accept a standard IEC P90 frame motor via a robust B5 flange. Its standout feature, however, is the «NH» output configuration, which utilizes a hollow shaft with a keyless shrink disc, providing a superior, backlash-free connection to your driven machine.
Technical Specifications of the A 30 2 NH 20 P90 B5
The A 30 series features a highly rigid, unibody cast-iron housing designed to withstand extreme radial and axial shock loads without compromising internal gear alignment.
- Part Number: A 30 2 NH 20 P90 B5
- Gearbox Series: A (Orthogonal Helical-Bevel Reducer)
- Frame Size: 30
- Number of Stages: 2 (Dual reduction gearing)
- Reduction Ratio (i): 20:1
- Output Configuration: NH (Hollow shaft with Shrink Disc)
- Motor Interface: IEC P90 frame
- Motor Flange Type: B5 (Large standard mounting flange)
Expert Installation Advice: Shrink Disc Dynamics
The NH shrink disc output is a massive engineering advantage, but only if installed correctly. Expert Tip: A shrink disc provides a 360-degree, keyless frictional clamping force that eliminates the backlash and fretting corrosion associated with standard keyed shafts. However, the golden rule of shrink disc installation is friction management. You must absolutely never lubricate or apply anti-seize paste to the bore of the gearbox or the surface of the driven machine shaft where the clamping force is applied. If oil or grease is present on the clamping surfaces, the coefficient of friction drops to zero, and the machine shaft will slip violently inside the gearbox under load, destroying both components. Clean the mating shafts with a heavy-duty degreaser before tightening the shrink disc bolts evenly in a circular pattern with a calibrated torque wrench.
Maintenance and Lubrication Guidelines
Helical-bevel gearboxes require premium lubrication to maintain their high efficiency. The A 30 size typically requires an initial oil change after the first 300 hours of operation (the «running-in» period) to flush out microscopic metallic particles generated as the new gears mate. Subsequent oil changes should occur every 3,000 to 4,000 hours depending on operating temperatures. Always use the Bonfiglioli-approved ISO VG synthetic gear oil. Because this is a cast-iron unit, periodically inspect the exterior paint for chipping to prevent surface rust in wash-down or high-humidity environments.
Frequently Asked Questions (FAQs)
Q: Is a 20:1 helical-bevel gearbox self-locking?
A: No. Helical-bevel gears are highly efficient and completely reversible. A 20:1 ratio will be easily back-driven by the load when the electric motor is turned off. If your application involves a hoist, elevator, or inclined conveyor, you must install an external failsafe motor brake to hold the load.
Q: Can I mount this gearbox in any position?
A: While the housing is universal, the internal oil quantity and vent plug locations depend strictly on the mounting orientation (e.g., B3, B8, V5). You must verify the plug positions based on your physical installation angle to prevent oil starvation or seal blowouts.
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