Purchase now: Bonfiglioli A 05 2 NH 15 P71 B14 Gearbox
Purchase now: Atlantechdrives provides you the A 05 2 NH 15 P71 B14, an ultra-compact, premium-efficiency orthogonal (right-angle) helical-bevel gear reducer masterfully engineered by the power transmission experts at Bonfiglioli. Belonging to the elite A Series, this specialized micro-gearbox is designed to provide the profound space-saving benefits of a 90-degree fractional drive while delivering the extreme mechanical efficiency (often exceeding 95%) of a precision helical gear train. This specific unit features the smallest physical frame size in the high-performance series (Size 05) and utilizes a 2-stage reduction design to achieve a fast, highly responsive 15:1 reduction ratio. Its absolute standout feature is the «NH» (Hollow shaft with Shrink Disc) output configuration, which provides a premium, completely backlash-free frictional connection to your driven machine. Designed to accept a fractional IEC P71 electric motor via a compact B14 face-mount flange, it is the ultimate transmission choice for precision micro-conveyors, robotic end-effectors, pharmaceutical packaging lines, and compact automated test equipment where energy conservation and zero mechanical slop are strictly required.
Technical Specifications of the A 05 2 NH 15 P71 B14
The A 05 series utilizes a highly rigid, ultra-lightweight unibody housing that maintains absolute internal bevel gear alignment even under continuous shock loads. The internal helical and bevel gears are case-hardened and precision-profiled for virtually silent, continuous 24/7 micro-automation operations.
- Part Number: A 05 2 NH 15 P71 B14
- Gearbox Series: A (Orthogonal Helical-Bevel Reducer)
- Frame Size: 05 (Ultra-compact fractional design)
- Number of Stages: 2 (Dual reduction gearing)
- Reduction Ratio (i): 15:1 (Fast output speed)
- Output Configuration: NH (Hollow shaft with keyless Shrink Disc)
- Motor Interface: IEC P71 frame
- Motor Flange Type: B14 (Compact face mount)
Expert Installation Advice: Micro Shrink Disc Protocols
The NH shrink disc output is a massive engineering advantage over standard keyed shafts, providing a 360-degree frictional clamping force that eliminates mechanical backlash entirely—a critical feature for precision robotics and dosing pumps. However, it requires absolute precision during installation. Expert Tip: The golden rule of shrink disc installation is strict friction management. You must absolutely never lubricate, oil, or apply anti-seize paste to the internal bore of the gearbox or the surface of your driven machine’s shaft where the clamping force is applied. If oil or grease is present on these mating surfaces, the coefficient of friction drops to near zero. The machine shaft will slip violently inside the gearbox under torque load, instantly scoring and destroying both the shaft and the gearbox bore. Thoroughly clean the machine shaft with an industrial degreaser before tightening the micro shrink disc bolts evenly with a calibrated torque wrench in a slow, circular pattern.
Maintenance: Torque Arm Anchoring and Total Reversibility
Because the A 05 is a shaft-mounted gearbox (suspended directly on the driven machine shaft via the shrink disc), the entire gearbox housing will attempt to spin around the shaft when the P71 electric motor engages. You must safely anchor the gearbox to the machine frame using a small torque arm (reaction arm) equipped with rubber vibration-dampening bushings. Additionally, automation engineers must understand that a highly efficient 15:1 helical-bevel gearbox is completely dynamically reversible. It offers absolutely no resistance to back-driving. If your application involves holding a suspended load against gravity or requires instant, precise positional stops, you must install an external failsafe electromechanical brake on your AC motor.
Frequently Asked Questions (FAQs)
Q: What are the main benefits of the NH shrink disc over a standard keyed hollow shaft?
A: A standard keyway concentrates all the rotational torque on a single tiny piece of steel, which can wallow out and create mechanical backlash over time—disastrous for precision positioning. A shrink disc clamps around the entire circumference of the shaft, distributing the torque evenly, eliminating backlash entirely, and preventing the shaft from getting stuck over the years.
Q: Why choose the A 05 Helical-Bevel instead of a similarly sized worm gear for a 15:1 ratio?
A: Worm gears rely heavily on sliding friction, converting electrical energy into wasted heat. The A 05 transfers torque through the rolling contact of precision-ground gears, meaning it consumes significantly less electrical amperage, runs drastically cooler, and provides a much longer lifespan without bronze gear wear.
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