Bonfiglioli A202 UH35 FIA 39.6 Right Angle Speed Reducer

The Bonfiglioli A202 UH35 FIA 39.6 Right Angle Speed Reducer is a mechanical gear unit intended for compatible industrial drive systems. The A202 value identifies the frame size, the UH35 value describes the configuration, the FIA value describes the motor interface, and the 39.6 value describes the ratio.

The A series is associated with right angle gear units that combine a helical stage with a bevel stage. This arrangement provides both reduction and a ninety degree change in direction, which is useful where the motor cannot be mounted in line with the driven shaft.

Reference and Frame Size

The A202 value identifies the frame size and the approximate torque class. The UH35 value describes a configuration detail, such as the shaft arrangement or the mounting style. The FIA value describes the motor interface, and the 39.6 value describes the ratio.

Because the string is coded, each value should be confirmed against the project documentation. Two units with the same frame size but different shaft arrangements may not be interchangeable, even if the mounting holes appear to match.

Mechanical Function

The gearbox transfers torque between the input and output shafts through its helical and bevel stages. It reduces the motor speed and increases the output torque according to the 39.6 ratio. The user should confirm the output speed, the output torque, and the permissible overhung loads against the machine requirement.

The gearbox should not be exposed to loads beyond its specified capacity. Shock loads, misalignment, and excessive overhung loads can affect bearings, gears, and seals. The machine design should provide adequate support for the gearbox and for the connected shafts.

Motor Interface and Coupling

The FIA interface should be matched to the motor flange and shaft. Where a coupling is used between the motor and the gearbox, the coupling should be aligned within the limits allowed by the design. Where the motor shaft engages directly with a clamping hub or a keyed bore, the fit should be checked before assembly.

Impact on the shafts during assembly should be avoided, and the gearbox should be supported so that its weight does not load the motor bearing.

Mounting and Alignment

The gearbox should be mounted on a rigid structure that can support the torque and load. The mounting surface should be clean and flat, and the fasteners should be tightened to the specified values. The gearbox should not be distorted by uneven surfaces or excessive bolt force, because distortion can affect gear alignment and seal performance.

Shaft alignment to the driven machine should be checked carefully. Couplings should be aligned within the limits allowed by the coupling and gearbox design. Guards should be fitted where rotating parts are accessible.

Lubrication and Sealing

Lubrication is essential for reliable gear operation. The correct lubricant type and quantity depend on the gearbox size, the mounting position, and the operating conditions. The user should follow the product documentation for lubricant selection and service intervals.

Seals protect the lubricant and exclude contamination. During inspection, the user should check for leakage around shafts and joints. Oil stains may indicate seal wear or loose connections.

Thermal Behaviour

The gearbox generates heat at the gear mesh, and the thermal capacity depends on the housing surface, the mounting position, and the ambient conditions. Good airflow around the housing supports stable operation. Where the gearbox is mounted inside an enclosure, the internal temperature should be considered in the design.

If the application includes high duty cycles or high ambient temperature, the thermal capacity should be reviewed before the machine is placed into continuous service.

Commissioning

Commissioning should begin with a mechanical inspection. The mounting bolts, the couplings, and the guards should be checked, and the lubricant level should be confirmed. The gearbox should be run at low load where possible to observe noise, vibration, and leakage.

The direction of rotation should be confirmed, and the output speed should be checked against the expected value for the 39.6 ratio. The driven machine should be checked for smooth operation. Commissioning records should include the full reference, the ratio, the motor interface, and the test results.

Diagnostics and Maintenance

If the gearbox runs noisily, the user should check alignment, mounting, lubrication, and load conditions. Vibration may come from the coupling, the driven machine, or the gearbox itself, and the source should be identified before parts are replaced. If the gearbox overheats, the load, duty cycle, ambient temperature, and lubrication should be reviewed.

Routine maintenance should include checking for leakage, noise, vibration, and loose fasteners. The lubricant should be inspected and changed according to the service plan. Maintenance work should be performed with the machine isolated and secured.

Application Value

The A202 UH35 FIA 39.6 reducer supports speed reduction and torque transmission with a right angle layout in compatible machinery. It can be applied in conveyor, mixing, packaging, and other industrial drive arrangements where a bevel helical gear solution fits the design.

Summary

The Bonfiglioli A202 UH35 FIA 39.6 Right Angle Speed Reducer is intended for compatible mechanical power transmission. Correct reference verification, mounting, alignment, lubrication, commissioning, and maintenance are essential.