Purchase now: Bonfiglioli VF 49 V 28 P71 B14 B3 Gearbox
Purchase now: Atlantechdrives provides you the VF 49 V 28 P71 B14 B3, a highly durable, compact worm gear reducer engineered by the global specialists at Bonfiglioli. As a core component of the widely utilized VF Series, this gearbox is the absolute industry standard for reliable, 90-degree power transmission in space-constrained industrial environments. This specific unit is configured with a mid-range 28:1 reduction ratio, striking a perfect balance between output torque and operational speed. It is an excellent choice for conveyor belt drives, rotary packaging tables, and automated gate operators. Featuring a standard «V» casing configuration, it is ready to accept a standard IEC P71 electric motor via a compact B14 face-mount flange. The aluminum die-cast housing provides excellent heat dissipation while ensuring the unit remains lightweight enough for integration into mobile machinery or suspended conveyor frames.
Technical Specifications of the VF 49 V 28 P71 B14 B3
The VF 49 size is engineered with a profile-ground steel worm shaft driving a high-grade bronze worm wheel. This time-tested metallurgical pairing guarantees smooth sliding friction, low operational noise, and exceptional longevity under varying loads.
- Part Number: VF 49 V 28 P71 B14 B3
- Gearbox Series: VF (Aluminum Worm Gear Reducer)
- Frame Size: 49
- Configuration: V (Standard housing configuration)
- Reduction Ratio (i): 28:1 (Mid-range ratio)
- Motor Interface: IEC P71 frame
- Motor Flange Type: B14 (Compact face mount)
- Mounting Position: B3 (Horizontal, foot mounted)
Expert Tips: The Reversibility Threshold
When selecting a worm gearbox, engineers must carefully evaluate the dynamic reversibility of the chosen ratio. Expert Tip: The 28:1 reduction ratio places the VF 49 right at the threshold of reversibility. Gearboxes with a ratio below 30:1 are considered dynamically reversible. This means that if you turn off the electric motor, a heavy load on the output shaft can back-drive the gearbox and cause the motor to spin backward. This unit will not act as a reliable static brake. If your application involves an inclined conveyor, a vertical lifting hoist, or holding a suspended weight against gravity, you must never rely on a 28:1 worm gear to hold the load securely. You must install an external failsafe electromechanical brake on your AC motor to ensure the machine remains locked in position when power is removed.
Maintenance and B14 Flange Integration
The VF 49 is a factory-sealed unit, pre-filled with high-performance synthetic gear oil. It is «lubricated for life,» meaning it lacks breather, drain, or fill plugs. This completely eliminates the need for periodic oil changes and prevents leaks, allowing the unit to operate reliably. This specific model features a B14 motor input flange. Unlike the massive B5 flange, the B14 is a «face-mount» design. The mounting bolts pass directly through the gearbox casting and thread into the face of the electric motor. This significantly reduces the outer diameter of the assembly, making it the perfect choice for squeezing into tight machine guards where radial space is at a premium.
Frequently Asked Questions (FAQs)
Q: What does the «V» housing designation mean?
A: The «V» designation refers to the physical shape and mounting options of the cast aluminum housing, denoting the standard layout with standard mounting feet and output shaft geometry, as opposed to extended or specialized flange versions.
Q: Will the gearbox get hot during normal operation?
A: Yes. Because a worm gear relies on sliding friction, it is less efficient than a helical gear. The lost energy is converted into radiant heat. The aluminum casing is designed to run hot to the touch (often reaching 60-80°C) during continuous duty cycles, which is perfectly normal.
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