Bonfiglioli A202 UR 35.4 P71 B3 Bevel Gearbox
Product Overview
The Bonfiglioli A202 UR 35.4 P71 B3 is an industrial bevel gearbox from the A series. It is intended for right angle speed reduction and torque transmission. The model reference includes ratio 35.4, a P71 motor interface, and B3 mounting arrangement. The bevel gear design supports efficient right angle power transfer in a compact layout.
The unit can be used in conveyors, mixers, processing equipment, material handling, and general industrial machinery. Correct selection depends on output torque, input speed, duty cycle, mounting position, and environment. The gearbox should be installed by qualified personnel and according to technical documentation.
Construction and Mechanical Design
The bevel gearbox contains a housing, bevel gear stages, shafts, bearings, and sealing elements. The bevel gears transmit torque between shafts at an angle. The housing supports the bearing arrangement and protects internal parts from contamination. Seals retain lubricant and reduce the entry of dust and moisture. The mounting interface and shaft connections must match the machine structure.
Installation requires a clean and rigid mounting surface. The gearbox should seat without distortion. Fasteners must be tightened to the specified torque and checked after initial operation. Shaft connections should be aligned carefully. Couplings and transmission elements must be fitted with suitable tools and without impact.
Ratio and Motor Interface
The ratio 35.4 defines the relationship between input speed and output speed. The designer should confirm that the output speed and torque match the driven machine. Starting torque, peak torque, and shock loads should be considered. Frequent starts, reversing, and high inertia can affect gearbox life.
The P71 interface defines motor connection details. The B3 mounting arrangement must match the machine structure. The motor flange, shaft, and pilot must match the gearbox input. Incorrect adaptation can cause vibration, misalignment, or damage. The motor should be fitted without force.
Installation and Commissioning
Before installation, the gearbox should be inspected for damage and the identification details checked. The shaft and mounting surfaces should be clean. Alignment with the motor and driven machine should be verified. Guards should protect rotating parts. The installation should provide access for lubrication checks and maintenance.
Commissioning should begin with a low load run where possible. Rotation direction, noise, vibration, leakage, and temperature should be checked. Fasteners should be rechecked after initial operation. The lubricant level should be confirmed according to the mounting position.
Lubrication and Thermal Conditions
Lubrication reduces friction and wear and helps remove heat from the gear mesh and bearings. The specified lubricant type and quantity must be used. The mounting position determines the correct oil level and plug arrangement. Fill, level, and drain points should remain accessible.
Operating temperature should remain within the intended range. The housing should have adequate air flow. Excessive temperature can indicate overload, incorrect lubricant, or inadequate cooling. Leakage should be corrected because low lubricant level can damage gears and bearings.
Operation and Monitoring
During operation, the gearbox should run smoothly within the designed speed and torque range. Operators should monitor noise, vibration, temperature, and leakage. A change in running sound can indicate wear or lubrication problems. Vibration can result from coupling issues, loose fasteners, or bearing damage.
Load changes can affect gearbox life. Increased throughput, higher torque, frequent reversing, or shock loading should be reviewed against the original selection. The gearbox should not be operated beyond its rated conditions.
Protection and Maintenance
Reliability depends on correct mounting, suitable lubrication, and protection from contamination. Seals should be inspected for damage. The gearbox should not be exposed to water, dust, or corrosive substances beyond its intended protection level. Excessive vibration and misalignment should be corrected.
Maintenance should include periodic inspection of lubricant, seals, fasteners, and housing condition. The interval depends on operating hours, load, temperature, and environment. Before service, the machine must be isolated and secured against rotation.
Integration and Selection Summary
The A202 UR 35.4 P71 B3 gearbox can be integrated into industrial machines that require right angle bevel speed reduction and torque transmission. The final application determines protection, mounting position, and maintenance access.
Selection should confirm the model A202 UR 35.4 P71 B3, ratio 35.4, motor interface, shaft arrangement, torque capacity, mounting position, and lubrication requirements. The designer should verify compatibility with the motor and driven machine. Documentation should be reviewed before installation.
