Purchase now: Bonfiglioli F 20 2 H 30 P80 B5 Gearbox
Purchase now: Atlantechdrives provides you the F 20 2 H 30 P80 B5, a highly advanced, premium-efficiency parallel shaft helical gear reducer from Bonfiglioli’s globally renowned F Series. Specifically engineered for complex industrial applications where mounting space is severely restricted but maximum mechanical power transfer is absolutely mandatory, the F Series delivers a remarkably slim, flat profile. It is designed to mount directly onto the driven machine’s solid shaft, allowing the electric motor to sit securely parallel to the machine chassis, saving critical factory walkway space. Unlike traditional worm gears that lose substantial electrical energy to sliding friction, the parallel helical gears transfer rotational torque with almost zero mechanical friction, resulting in efficiencies frequently exceeding 95%. This model features a 2-stage reduction design achieving a versatile 30:1 ratio for excellent mid-range torque multiplication, a Hollow output shaft (H) with a standard keyway, and an input flange designed for a standard IEC P80 electric motor with a B5 flange. It is the optimal power transmission choice for shaft-mounted material augers, heavy-duty belt conveyors, and overhead crane drives.
Technical Specifications of the F 20 2 H 30 P80 B5
The F 20 utilizes a highly rigid unibody cast-iron housing that maintains perfect internal gear alignment even under continuous radial and axial shock loads. The helical gears are case-hardened and precision-ground for silent, vibration-free 24/7 continuous operation.
- Part Number: F 20 2 H 30 P80 B5
- Gearbox Series: F (Parallel Shaft Helical Reducer)
- Frame Size: 20 (Compact flat profile cast-iron construction)
- Number of Stages: 2 (Dual reduction gearing)
- Output Configuration: H (Hollow shaft with standard keyway)
- Reduction Ratio (i): 30:1 (Mid-range output speed and torque)
- Motor Interface: IEC P80 frame
- Motor Flange Type: B5 (Large standard mounting flange)
Expert Installation Advice: The Crucial Torque Arm Anchor
Shaft-mounting a heavy cast-iron gearbox introduces unique mechanical dynamics that must be managed correctly by automation engineers. Expert Tip: Because the F 20 mounts directly onto the solid shaft of your driven machine via its hollow bore, the entire gearbox housing will forcefully attempt to spin around that shaft when the P80 electric motor engages. To prevent this catastrophic rotation, you must absolutely install a torque arm (reaction arm) connecting the gearbox housing to a fixed, structural point on the machine frame. Never bolt the torque arm completely rigid; you must use rubber vibration-dampening bushings at the anchor point. If you bolt the gearbox rigidly to the frame while it is suspended on the machine shaft, any minor runout or shaft bending during normal operation will destroy the gearbox’s internal bearings within weeks.
Maintenance: Preventing Hollow Shaft Fretting Corrosion
One of the most common and costly maintenance nightmares in industrial power transmission involves hollow shaft gearboxes getting permanently stuck to the machine shaft. This is caused by «fretting corrosion»—microscopic vibrations that cause the steel surfaces to rust and cold-weld together over thousands of operating hours. Before sliding the F 20 gearbox onto your machine shaft, you must thoroughly clean the shaft and apply a heavy, even coating of high-quality anti-seize paste (such as Molybdenum Disulfide) inside the hollow bore and along the keyway. This simple preventative step guarantees the gearbox can be easily removed for maintenance years down the line without needing destructive hydraulic presses.
Frequently Asked Questions (FAQs)
Q: Why should I choose a parallel shaft (F Series) over an inline helical (C Series) for a 30:1 ratio?
A: Parallel shaft gearboxes have a highly efficient flat, narrow profile. This allows the electric motor to sit parallel to the driven machine, saving significant axial space. It is ideal for tight conveyor sides where a long inline motor would protrude too far into the aisle and create a safety hazard.
Q: Is the F 20 gearbox dynamically reversible?
A: Yes. High-quality helical gears are completely symmetrical and highly efficient in both rotational directions. This means the gearbox will not act as a brake; if you need to hold a load, you must install an external motor brake.
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When configuring a comprehensive and highly efficient drive system, this helical bevel gearbox is structurally optimized to be driven by the reliable BN 63B 2 230/400-50 IP55 asynchronous electric motor.
