Rossi gearmotor composed of MR 21 81 UP2A gearbox and three-phase asynchronous motor

1. General Description

The Rossi gearmotor, composed of the MR 21 81 UP2A gearbox and an asynchronous three-phase motor, represents a powerful and versatile combination of motor and gearbox for industrial applications. This gearmotor, being used, offers an excellent opportunity to obtain a high-quality device at a lower cost than new. Robustness and reliability are the main strengths of this machine.

2. Visual Appearance and Construction

Visually, the Rossi gearmotor with the MR 21 81 UP2A gearbox looks like a solid and well-assembled unit. The MR 21 81 UP2A reducer has a compact structure, generally made of aluminum alloy or steel, with a robust and industrial appearance. The three-phase asynchronous motor mounts directly to the rear of the gearbox, creating an integrated unit. The machine can be gray or blue in color, with a corrosion-resistant painted finish.

Components:

• MR 21 81 UP2A reducer: Metallic body, planetary or worm gears.
• Three-phase asynchronous motor: Cylindrical body with external cooling fans and electrical connection terminals.

3. Measurements and Technical Data

• Rossi MR 21 81 UP2A reducer:

  • Type: Planetary or worm gearbox.
  • Dimensions: Detailed specifications not always available online, but generally compact to fit in tight spaces.
  • Transmission Ratio: Variable depending on the model and application needs.

• Three-Phase Asynchronous Motor:

  • Power: 3 kW or 3.6 kW, depending on the specific version.
  • Revolutions per Minute: 1450 rpm.
  • Operating Frequency: 50 Hz and 60 Hz.
  • Motor Type: Three-phase asynchronous motor, designed to operate on three-phase alternating current.

4. Mechanical Characteristics

• Transmission Efficiency: The MR 21 81 UP2A gearbox is designed to offer high efficiency with reduced noise and vibration.
• Maximum Torque: Torque varies depending on the gear ratio and engine power. Typically high for industrial applications.
• Input and Output Speed: The output shaft speed is adjustable according to the gear ratio and engine speed.

5. Procedure for Use

To use the Rossi gearmotor with MR 21 81 UP2A gearbox, follow these steps:

1. Installation: Mount the gearmotor on a stable base using the mounting flanges. Make sure the alignment between the motor and the gearbox is correct.
2. Electrical Connection: Connect the motor to the three-phase electrical network, ensuring that the voltage and frequency correspond to the specifications (50 Hz or 60 Hz).
3. Gearbox Configuration: Set the desired gear ratio through the gearbox. This may require adjustment of gears or other internal components.
4. Startup and Test: Start the engine and check the operation of the gearmotor. Check for vibrations and strange noises and make sure everything is running smoothly.

6. Matching Accessories

• Replacement Gears: To adapt the gearbox to different transmission needs.
• Cooling Devices: If the gearmotor operates in hot or high intensity environments.
• Speed ​​and Torque Sensors: To monitor and regulate the performance of the gearmotor.
• Supports and Mountings: To ensure correct installation and alignment.

7. Mathematical Formulas for Optimal Operation

• Torque (T):

  $$T$$

  Where:

  • TT $T$ = Torque (Nm)
  • PP $P$ = Motor power (W)
  • ω\omega $\omega$ = Angular velocity (rad/s)

• Angular Velocity (ω):

  $$\omega$$

  Where:

  • ω\omega $\omega$ = Angular velocity (rad/s)
  • nn $n$ = Engine speed (rpm)

• Gear Ratio(s):

  $$i$$

  Where:

  • ii $i$ = Gear ratio
  • NinputN _{\text{input}} $Ninput$ ​=
  • NoutputN _{\text{output}} $Noutput$ ​=

8. Workable Materials

The Rossi gearmotor with MR 21 81 UP2A gearbox and three-phase asynchronous motor is suitable for a wide range of industrial applications, including the processing of materials such as:

• Metals: For manufacturing and assembly processes.
• Plastics: In manufacturing and handling applications.
• Wood: For the processing and production of wooden components.
• Composite Materials: In sectors requiring high precision.

9. Maintenance and Control of Good Used Products

• Visual Inspection: Check for signs of wear, external damage and lubricant leaks. Check that all components are in good condition.
• Lubrication Check: Make sure the gearbox and motor are well lubricated according to the manufacturer's specifications.
• Operation Test: Perform load tests to ensure that the gearmotor operates without vibrations and abnormal noises.
• Maintenance Documentation: Check the service and maintenance documentation to ensure that the gearmotor has been properly maintained.

10. Sectors of Use

The Rossi gearmotor composed of the MR 21 81 UP2A reducer and the three-phase asynchronous motor is used in various sectors, including:

• Industrial Automation: To operate machines and production lines.
• Transmission Systems: In mechanical transmission and speed reduction applications.
• Textile Sector: For the movement and control of textile processes.
• Food Industry: For the handling and processing of materials and production equipment.

11. Advantages of Buying Used

• Lower Cost: The used gearmotor offers an excellent quality-price ratio, reducing the cost compared to the new one.
• Reliability: If well maintained, a used gearmotor can guarantee performance comparable to that of a new one.
• Immediate Availability: Buying used reduces waiting times for delivery, allowing rapid replacement or start-up of operations.

Conclusion

The Rossi gearmotor composed of the MR 21 81 UP2A gearbox and the three-phase asynchronous motor is a versatile and powerful solution for industrial applications that require high reliability and robustness. Thanks to its solid construction and excellent performance, this gearmotor represents an advantageous choice, especially if purchased used, allowing you to obtain a high quality product at a lower price and with immediate availability.