Purchase now: Bonfiglioli C 12 2 P 50 P71 B5 Helical Gearbox
Purchase now: Atlantechdrives provides you the C 12 2 P 50 P71 B5, a premium-grade, highly efficient inline coaxial helical gearmotor assembly meticulously engineered by the power transmission experts at Bonfiglioli. Belonging to the highly respected C Series, this gearbox is specifically designed for complex industrial applications where maximizing energy efficiency, optimizing power density, and minimizing operating temperatures are strict operational requirements. Unlike traditional 90-degree worm gears that lose substantial electrical power to sliding friction and heat generation, the advanced helical gear architecture of the C 12 transfers rotational torque through precise rolling contact, delivering extreme mechanical efficiencies often exceeding 96%. This specific model features an impressive 2-stage reduction design, achieving a massive 50:1 reduction ratio. Achieving such a high torque multiplication factor in only two internal stages is a testament to Bonfiglioli’s precision engineering. Configured with a solid output shaft and a «P» foot-mounted cast housing, it is built to accept a standard fractional IEC P71 electric motor via a large B5 face-mount flange. This inline unit is the ultimate solution for driving continuous fluid pumps, industrial mixers, long material handling conveyors, and heavy-duty agitators requiring continuous 24/7 reliability at low speeds.
Technical Specifications of the C 12 2 P 50 P71 B5
The C Series utilizes a highly rigid, unibody housing that maintains absolute internal gear alignment even under severe radial and axial shock loads. The internal helical gears are case-hardened and precision-ground to ensure incredibly quiet operation without significant wear over decades of use.
- Part Number: C 12 2 P 50 P71 B5
- Gearbox Series: C (Inline Coaxial Helical Gear Reducer)
- Frame Size: 12 (Compact industrial construction)
- Number of Stages: 2 (Dual reduction gearing)
- Output Configuration: P (Foot-mounted housing with solid output shaft)
- Reduction Ratio (i): 50:1 (Low output speed, high torque)
- Motor Interface: IEC P71 frame
- Motor Flange Type: B5 (Large standard mounting flange)
Expert Installation Advice: Managing Overhung Radial Loads
Unlike hollow-shaft mounted gearboxes, inline helical gears with solid output shafts rely heavily on precision front-bearing load management. Expert Tip: Because the C 12 features a «P» foot-mounted configuration, you will likely connect it to your driven machine via a chain sprocket, a heavy V-belt pulley, or a pinion gear attached directly to the solid output shaft. You must carefully calculate the Overhung Load (Radial Load) applied to this shaft, especially given the immense torque multiplied by the 50:1 ratio. If your heavy-duty drive chain is tensioned too tightly, the massive radial force pulls sideways on the gearbox output shaft. Over time, this extreme stress will crush the heavy-duty front bearings and cause the internal helical gears to misalign and grind against each other. Always position your sprockets or pulleys as close to the gearbox housing face as physically possible to significantly minimize the mechanical leverage effect.
Maintenance: Helical vs. Worm Gear Tribology at 50:1
Many automation engineers wonder why they should select a C Series inline helical gearbox over a standard W or VF Series worm gear for a 50:1 ratio. The answer is long-term energy consumption and thermal durability. A 50:1 worm gear relies heavily on sliding friction, which acts as a massive heater, wasting significant electrical amperage and eventually causing the gearbox to run extremely hot. The C 12 transfers torque via the rolling contact of its precision helical teeth. This means it consumes far less electrical amperage to perform the exact same mechanical work, runs drastically cooler to the touch, and eliminates the rapid bronze gear wear inherent to high-ratio worm drives.
Frequently Asked Questions (FAQs)
Q: What does the «2» mean in the part number C 12 2?
A: The «2» indicates that this gearbox features 2 internal reduction stages (two sets of mating helical gears). This dual-stage architecture allows the gearbox to achieve the impressive 50:1 ratio smoothly and highly efficiently while maintaining massive torque capacity in a compact physical length.
Q: Will the B5 input flange suffer from fretting corrosion?
A: Yes, if installed improperly. During thousands of hours of vibration, the steel motor shaft can cold-weld to the gearbox bore. You must apply a heavy coating of high-quality molybdenum disulfide (MoS2) assembly paste before sliding the P71 motor into the input hub to prevent this.
Do you need more references from this brand? Explore our full catalog of Bonfiglioli here.
For more complex multi-axis applications requiring a primary right-angle transmission, consider integrating this inline helical unit with the robust A 30 2 UH 15 P100 B5 bevel gear reducer.
