MH Couplings
The MH coupling comprises two flanges and a flexible ring designed to accommodate various shaft misalignments effectively. Constructed with synthetic rubber and steel cores, the flexible rings are reinforced to enhance reliability and enable maximum operating speed of the coupling. The damping properties of the rubber enable absorption and attenuation of torsional vibrations, ensuring smooth operation. Operating efficiently within a temperature range of -40 to +100 °C, the rubber also exhibits resistance to oil, dirt, grease, moisture, ozone, and various chemical solvents.
The MH coupling comprises two flanges and a flexible ring designed to accommodate various shaft misalignments effectively. Constructed with synthetic rubber and steel cores, the flexible rings are reinforced to enhance reliability and enable maximum operating speed of the coupling. The damping properties of the rubber enable absorption and attenuation of torsional vibrations, ensuring smooth operation. Operating efficiently within a temperature range of -40 to +100 °C, the rubber also exhibits resistance to oil, dirt, grease, moisture, ozone, and various chemical solvents. Trust AGKNX's couplings to provide durable and resilient performance, even in demanding industrial environments.
MH Coupling Size Chart
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| MH Coupling Size | Rated Torque(Nm.) | Max. Speed(RPM.) | Bore, D | Dimension(mm.) | Total Weight(kg.) | Moment of Inertia GD²(kg.m²) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min. (mm.) | Max. (mm.) | A | B | LTB | L | E | F | H | BCD | P | |||||
| MH45 | 2.0 | 6,000 | 5 | 14 | 45 | 25 | 23 | 49 | 20 | 13 | 15 | 30.0 | 9.5 | 0.48 | 2.10E-04 |
| MH55 | 4.0 | 6,000 | 9 | 20 | 55 | 38 | 27 | 57 | 26 | 15 | 17 | 36.0 | 11.0 | 1.02 | 6.20E-04 |
| MH65 | 7.0 | 6,000 | 12 | 25 | 65 | 45 | 30 | 63 | 33 | 16 | 19 | 45.0 | 12.0 | 1.88 | 1.50E-03 |
| MH80 | 16.0 | 5,500 | 16 | 30 | 80 | 52 | 35 | 73 | 41 | 18 | 23 | 57.0 | 16.5 | 3.54 | 3.70E-03 |
| MH90 | 37.0 | 5,000 | 20 | 35 | 90 | 62 | 40 | 83 | 46 | 21 | 25 | 64.5 | 18.0 | 5.40 | 7.10E-03 |
| MH115 | 80.0 | 4,600 | 25 | 45 | 115 | 80 | 55 | 113 | 58 | 29 | 33 | 82.0 | 23.0 | 8.10 | 2.70E-02 |
| MH130 | 120.0 | 4,400 | 27 | 50 | 130 | 90 | 60 | 123 | 65 | 32 | 37 | 93.5 | 27.5 | 13.50 | 4.20E-02 |
| MH145 | 200.0 | 4,200 | 30 | 55 | 145 | 100 | 65 | 133 | 72 | 35 | 39 | 102.0 | 30.0 | 19.30 | 9.40E-02 |
| MH175 | 420.0 | 3,800 | 35 | 65 | 175 | 115 | 80 | 163 | 84 | 43 | 47 | 120.0 | 35.5 | 26.30 | 1.90E-01 |
| MH200 | 640.0 | 3,600 | 50 | 80 | 200 | 130 | 110 | 223 | 92 | 69 | 53 | 140.0 | 41.0 | 35.70 | 3.10E-01 |
Service Factor
| Driven Machine | Driver Machine | |||
| Operating type | Examples | Electric Motor | Engine type | |
| 4 or more Cyl. | 3 or less Cyl. | |||
| Slightly shock | Centrifugal fan and pumps, agitator for light liquid, light generator, conveyor belt, brewing machinery. | 1.0-1.2 | 1.5-1.7 | 2.0-2.2 |
| Medium shock | Crane hoists, wood machinery, textile machinery, paper mill machinery, machine tools, centrifugal pump for loaded liquid. | 1.5-1.7 | 2.0-2.5 | 2.5-3.0 |
| Heavy shock | Crane hoists, wood machinery, textile machinery, paper mill machinery, machine tools, centrifugal pump for loaded liquid. | 2.0-2.2 | 2.5-3.5 | 3.0-4.0 |
Key Features of MH Couplings
MH couplings, often referred to as Mitsuboshi Hyper-Flex couplings, are a type of flexible coupling designed to connect two shafts while accommodating misalignment and transmitting torque efficiently. Here are the key features of MH couplings based on their typical design and functionality:
- Flexible Ring Design: MH couplings feature a flexible ring, usually made of synthetic rubber reinforced with steel cores. This design allows the coupling to compensate for various types of shaft misalignment, including angular, parallel, and axial misalignments.
- Misalignment Compensation: They can handle moderate levels of misalignment—typically up to 0.2 mm of parallel offset and 0.3° of angular misalignment—ensuring smooth operation even when shafts are not perfectly aligned.
- Vibration Damping: The rubber element in MH couplings absorbs and dampens torsional vibrations and shocks, reducing wear on connected equipment and improving system stability.
- High Torque Transmission: Despite their flexibility, MH couplings are capable of transmitting significant torque. The rated torque can be calculated using the formula: Rated Torque (Nm) = (9.55 x Power (kW) x Service Factor) / Speed (RPM), making them suitable for a variety of applications.
- Wide Operating Temperature Range: The synthetic rubber used in these couplings operates effectively between -40°C and +100°C, allowing use in diverse environmental conditions.
- Durability and Resistance: The rubber component is resistant to oil, dirt, grease, moisture, ozone, and many chemical solvents, enhancing the coupling’s longevity and reliability in harsh environments.
- Cast Iron Hubs: The coupling hubs are typically made of cast iron, providing strength and durability while protecting the flexible rubber element and ensuring efficient power transmission.
- Ease of Installation: MH couplings are designed for quick and easy mounting and disassembly, often available with various bore options (e.g., splined, hex, round, set screw, or keyway) to fit different shaft configurations.
- Compact and Lightweight: They feature a small footprint and low weight relative to the torque they can transmit, making them ideal for applications with space constraints.
- Versatility: MH couplings come in a range of sizes (e.g., MH-55, MH-65, MH-80, up to MH-230) and stock bore/keyway combinations, catering to diverse industrial needs such as motors, pumps, and other machinery.
Typical Applications of MH Couplings
MH couplings are a type of flexible coupling commonly used in various industrial applications to connect two shafts and transmit power while accommodating minor misalignments and dampening vibrations. They typically consist of two cast iron flanges and a synthetic rubber flexible ring reinforced with steel cores, which provides durability, flexibility, and resistance to harsh environmental conditions. Here are some typical applications of MH couplings:
- Pumps: MH couplings are widely used in pump systems, including water pumps, chemical pumps, and centrifugal pumps. Their ability to handle slight shaft misalignments (parallel offset up to 0.2 mm and angular misalignment up to 0.3°) and absorb torsional vibrations makes them ideal for ensuring smooth operation and reducing wear on pump components.
- Gearboxes: In machinery where gearboxes are employed, MH couplings connect the gearbox to the driven equipment. Their high torque transmission capacity and vibration-dampening properties help protect the gearbox and extend its operational life, especially in medium- to heavy-duty applications.
- Compressors: MH couplings are used in air and gas compressors to link the motor to the compressor unit. The rubber element’s resistance to oil, grease, and moisture, combined with its ability to operate in temperatures ranging from -40°C to +100°C, ensures reliable performance in demanding compressor environments.
- Blowers and Fans: These couplings are applied in industrial blowers and ventilation fans, where they transmit power from electric motors to the rotating components. The damping characteristics of the rubber ring reduce noise and vibration, improving efficiency and comfort in such systems.
- Conveyors: MH couplings are commonly found in conveyor systems, connecting motors or gearboxes to drive rollers. Their flexibility and lack of need for lubrication make them a low-maintenance solution for continuous material handling operations.
- Mixers: In industries like food processing, chemicals, or pharmaceuticals, MH couplings are used in mixers to connect the drive motor to the mixing shaft. Their resistance to dirt, ozone, and chemical solvents, along with easy mounting and disassembly, makes them suitable for these applications.
- Electric Motor and Internal Combustion Engine Systems: MH couplings provide reliable service in light, medium, and heavy-duty power transmission systems driven by electric motors or internal combustion engines. They are particularly valued for their ability to handle high torque and compensate for misalignment without requiring lubrication.
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MH Flexible Coupling Maintainance
Maintaining an MH Flexible Coupling ensures its longevity and optimal performance in applications like pumps, fans, compressors, and other machinery. These couplings, typically made with a synthetic rubber element and cast iron flanges, are designed for durability, misalignment compensation, and vibration damping. Here is a general guide for maintaining an MH Flexible Coupling:
1. Regular Inspection
- Frequency: Inspect the coupling periodically, ideally during scheduled maintenance downtime (e.g., every 3-6 months, depending on usage intensity).
- What to Check:
- Look for visible wear, cracks, or tears in the rubber element.
- Inspect the cast iron flanges for signs of corrosion, cracks, or deformation.
- Ensure bolts and other fasteners are secure and not loose.
2. Alignment Check
- Why It Matters: While MH couplings can handle some misalignment (e.g., parallel offset of 0.2 mm and angular misalignment of 0.3°), excessive misalignment can accelerate wear.
- How to Check:
- Use a straightedge, dial indicator, or laser alignment tool to verify shaft alignment.
- Adjust the connected machinery if misalignment exceeds the coupling’s tolerance.
3. Cleaning
- Process: Remove dust, dirt, grease, or oil buildup from the rubber element and flanges using a mild solvent or cloth. Avoid harsh chemicals that could degrade the rubber.
- Note: The rubber in MH couplings resists oil, moisture, and some chemicals, but prolonged exposure to harsh substances can still cause deterioration.
4. Rubber Element Maintenance
- Condition Monitoring: The synthetic rubber (often reinforced with steel cores) is the heart of the coupling’s flexibility. Check for hardening, brittleness, or loss of elasticity, which can occur over time (typically after 5-10 years or 50,000 hours, depending on conditions).
- Replacement: If the rubber shows significant wear or damage, replace it with a compatible element from the manufacturer. Ensure the new element matches the coupling’s specifications (e.g., MH-55, MH-65, etc.).
Additional information
| Edited by | Yjx |
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