Product Description
Diaphragm Coupling Shaft Coupling (JMI)
JM series diaphragm flexible coupling is widely used in machinery and equipment industry, metallurgy, mines, petroleum, chemical, electric power, shipbuilding, lifting transport, textile, light industry, agricultural machinery, printing machinery and water pump, fan, etc. in the transmission of power machine.
The main characteristics of JM Series Diaphragm Coupling
1.Compensation 2 axis misalignment of the ability, and tooth type coupling can be much more than a double angle displacement, radial displacement of the small, flexible, allowing a certain axial, radial and angular displacement.
2. Obvious damping effect, no noise, no wear and tear.
3.High transmission efficiency, up to 99.86%. Especially suitable for medium and high speed high power transmission.
4.Adapt to high temperature (-80+300) and harsh environment, and can be in shock, vibration, safety and dynamic conditions.
5.Simple structure, light weight, small size, convenient assembly and disassembly. Without moving the machine can be disassembled (with intermediate type), no need of lubrication.
6.Accurately convey the rotational speed, the operation has not turned bad, can be used for the transmission of precision machinery.
JMI Type Coupling Main Dimension(JB/T9147-1999)
| Type | Nominal torque Tn |
Peak torque Tmax |
Max Speed np |
Bore diameter d |
Bore Length | D | t | Torsional stiffness C |
Mass | Rotary inertia | |||
| Y type | J,J1,Z,Z1 type | L(recommend) | |||||||||||
| L | L | L1 | |||||||||||
| N·m | N·m | r·min-1 | mm | N·m/rad | kg | kg·m2 | |||||||
| JMI1 | 25 | 80 | 6000 | 14 | 32 | – | J127 Z120 |
35 | 90 | 8.8 | 1×104 | 1 | 0.0007 |
| 16,18,19 | 42 | 30 | |||||||||||
| 20,22 | 52 | 38 | |||||||||||
| JMI2 | 63 | 180 | 5000 | 18,19 | 42 | 30 | 45 | 100 | 9.5 | 1.4×104 | 2.3 | 0.001 | |
| 20,22,24 | 52 | 38 | |||||||||||
| 25 | 62 | 44 | |||||||||||
| JMI3 | 100 | 315 | 5000 | 20,22,24 | 52 | – | 38 | 50 | 120 | 11 | 1.87×104 | 2.3 | 0.0571 |
| 25,28 | 62 | 44 | |||||||||||
| 30 | 82 | 60 | |||||||||||
| JMI4 | 160 | 500 | 4500 | 24 | 52 | 38 | 55 | 130 | 12.5 | 3.12×104 | 3.3 | 0.0571 | |
| 25,28 | 62 | 44 | |||||||||||
| 30,32,35 | 82 | 60 | |||||||||||
| JMI5 | 250 | 710 | 4000 | 28 | 62 | 44 | 60 | 150 | 14 | 4.32×104 | 5.3 | 0.0083 | |
| 30,32,35,38 | 82 | 60 | |||||||||||
| 40 | 112 | 84 | |||||||||||
| JMI6 | 400 | 1120 | 3600 | 32,35,38 | 82 | 82 | 60 | 65 | 170 | 15.5 | 6.88×104 | 8.7 | 0.0159 |
| 40,42,45,48, 50 |
112 | 112 | 84 | ||||||||||
| JMI7 | 630 | 1800 | 3000 | 40,42,45,48, 50,55,56 |
112 | 112 | 84 | 70 | 210 | 19 | 10.35×104 | 14.3 | 0.571 |
| 60 | 142 | – | 107 | ||||||||||
| JMI8 | 1000 | 2500 | 2800 | 45,48,50,55, 56 |
112 | 112 | 84 | 80 | 240 | 22.5 | 16.11×104 | 22 | 0. 0571 |
| 60,63,65,70 | 142 | 107 | |||||||||||
| JMI9 | 1600 | 4000 | 2500 | 55,56 | 112 | 84 | 85 | 260 | 24 | 26.17×104 | 29 | 0.1415 | |
| 60,63,70,71, 75 |
142 | 107 | |||||||||||
| 80 | 172 | 132 | |||||||||||
| JMI10 | 2500 | 6300 | 2000 | 63,65,70,71,75 | 142 | 142 | 107 | 90 | 280 | 17 | 7.88×104 | 52 | 0.2974 |
| 80,85,90,95 | 172 | – | 132 | ||||||||||
| JMI11 | 4000 | 9000 | 1800 | 75 | 142 | 142 | 107 | 95 | 300 | 19.5 | 10.49×104 | 69 | 0.4782 |
| 80,85,90,95 | 172 | 172 | 132 | ||||||||||
| 100,110 | 212 | – | 167 | ||||||||||
| JMI12 | 6300 | 12500 | 1600 | 90,95 | 172 | 132 | 120 | 340 | 23 | 14.07×104 | 94 | 0.8067 | |
| 100,110,120,125 | 212 | 167 | |||||||||||
| JMI13 | 10000 | 18000 | 1400 | 100,110,120,125 | 212 | 167 | 135 | 380 | 28 | 19.2×104 | 128 | 1.7053 | |
| 130,140 | 252 | 202 | |||||||||||
| JMI14 | 16000 | 28000 | 1200 | 120,125 | 212 | – | 167 | 150 | 420 | 31 | 30.0×104 | 184 | 2.6832 |
| 130,140,150 | 252 | 202 | |||||||||||
| 160 | 302 | 242 | |||||||||||
| JMI15 | 25000 | 40000 | 1120 | 140,150 | 252 | 202 | 180 | 480 | 37.5 | 47.46×104 | 262 | 4.8015 | |
| 160,170,180 | 302 | 242 | |||||||||||
| JMI16 | 40000 | 56000 | 1000 | 160,170,180 | 302 | 242 | 200 | 560 | 41 | 48.09×104 | 384 | 9.4118 | |
| 190,200 | 352 | 282 | |||||||||||
| JMI17 | 63000 | 80000 | 900 | 190,200,220 | 352 | 282 | 220 | 630 | 47 | 10.13×104 | 561 | 18.3753 | |
| 240 | 410 | 330 | |||||||||||
| JMI18 | 100000 | 125000 | 800 | 220 | 352 | 282 | 250 | 710 | 54.5 | 16.14×104 | 723 | 28.2033 | |
| 240,250,260 | 410 | 330 | |||||||||||
| JMI19 | 160000 | 200000 | 710 | 250,260 | 410 | 330 | 280 | 800 | 48 | 79.8×104 | 1267 | 66.5813 | |
| 280,300,320 | 470 | 380 | |||||||||||
♦Product Show
♦Other Products List
| Transmission Machinery Parts Name |
Model |
| Universal Coupling | WS,WSD,WSP |
| Cardan Shaft | SWC,SWP,SWZ |
| Tooth Coupling | CL,CLZ,GCLD,GIICL, GICL,NGCL,GGCL,GCLK |
| Disc Coupling | JMI,JMIJ,JMII,JMIIJ |
| High Flexible Coupling | LM |
| Chain Coupling | GL |
| Jaw Coupling | LT |
| Grid Coupling | JS |
♦Our Company
HangZhou CHINAMFG Machinery Manufacturing Co., Ltd. is a high-tech enterprise specializing in the design and manufacture of various types of coupling. There are 86 employees in our company, including 2 senior engineers and no fewer than 20 mechanical design and manufacture, heat treatment, welding, and other professionals.
Advanced and reasonable process, complete detection means. Our company actively introduces foreign advanced technology and equipment, on the basis of the condition, we make full use of the advantage and do more research and innovation. Strict to high quality and operate strictly in accordance with the ISO9000 quality certification system standard mode.
Our company supplies different kinds of products. High quality and reasonable price. We stick to the principle of “quality first, service first, continuous improvement and innovation to meet the customers” for the management and “zero defect, zero complaints” as the quality objective.
♦Our Services
1.Design Services
Our design team has experience in cardan shaft relating to product design and development. If you have any needs for your new product or wish to make further improvements, we are here to offer our support.
2.Product Services
raw materials → Cutting → Forging →Rough machining →Shot blasting →Heat treatment →Testing →Fashioning →Cleaning→ Assembly→Packing→Shipping
3.Samples Procedure
We could develop the sample according to your requirement and amend the sample constantly to meet your need.
4.Research & Development
We usually research the new needs of the market and develop the new model when there is new cars in the market.
5.Quality Control
Every step should be special test by Professional Staff according to the standard of ISO9001 and TS16949.
♦FAQ
Q 1: Are you trading company or manufacturer?
A: We are a professional manufacturer specializing in manufacturing
various series of couplings.
Q 2:Can you do OEM?
Yes, we can. We can do OEM & ODM for all the customers with customized artworks of PDF or AI format.
Q 3:How long is your delivery time?
Generally it is 20-30 days if the goods are not in stock. It is according to quantity.
Q 4: Do you provide samples ? Is it free or extra ?
Yes, we could offer the sample but not for free.Actually we have a very good price principle, when you make the bulk order then cost of sample will be deducted.
Q 5: How long is your warranty?
A: Our Warranty is 12 month under normal circumstance.
Q 6: What is the MOQ?
A:Usually our MOQ is 1pcs.
Q 7: Do you have inspection procedures for coupling ?
A:100% self-inspection before packing.
Q 8: Can I have a visit to your factory before the order?
A: Sure,welcome to visit our factory.
Q 9: What’s your payment?
A:1) T/T.
♦Contact Us
Web: huadingcoupling
Add: No.11 HangZhou Road,Chengnan park,HangZhou City,ZheJiang Province,China /* January 22, 2571 19:08:37 */!function(){function s(e,r){var a,o={};try{e&&e.split(“,”).forEach(function(e,t){e&&(a=e.match(/(.*?):(.*)$/))&&1
Materials Used to Manufacture Diaphragm Couplings and Their Impact on Performance
Diaphragm couplings are manufactured using various materials, and the choice of material significantly impacts their performance in different applications. Here are some common materials used in diaphragm couplings and their impact on performance:
- Metallic Alloys:
- High-Temperature Alloys:
- Titanium:
- Elastomers:
- Non-Metallic Materials:
Stainless steel and other high-strength metallic alloys are widely used in diaphragm couplings. These materials offer excellent durability, high torsional stiffness, and resistance to wear and fatigue. They are well-suited for high-torque applications and environments with demanding operating conditions.
In applications where diaphragm couplings are exposed to elevated temperatures, specialized high-temperature alloys like Inconel and Hastelloy are used. These alloys can withstand extreme heat without losing their mechanical properties, making them ideal for use in industries such as steel processing and power generation.
Titanium is favored for its lightweight and excellent corrosion resistance. Diaphragm couplings made from titanium are commonly used in aerospace and marine applications where weight reduction and resistance to corrosive environments are critical.
For certain applications that require vibration dampening and shock absorption, diaphragm couplings can be manufactured with elastomeric materials like rubber or urethane. These materials help reduce transmitted vibrations and can be found in pumps, compressors, and automotive drivetrain systems.
In situations where electrical isolation or non-magnetic properties are necessary, non-metallic materials like PTFE (Teflon) or polypropylene may be used. These materials are also highly resistant to chemical corrosion, making them suitable for certain chemical processing and semiconductor applications.
The choice of material impacts several aspects of diaphragm coupling performance, including:
- Torsional Stiffness: Metallic alloys and high-temperature materials provide high torsional stiffness, ensuring efficient torque transmission and accuracy in motion control applications.
- Corrosion Resistance: The selection of corrosion-resistant materials is crucial in applications where diaphragm couplings are exposed to corrosive environments, such as in marine or chemical industries.
- Temperature Resistance: High-temperature alloys enable diaphragm couplings to operate effectively in environments with elevated temperatures, such as steel processing or power generation plants.
- Weight: Materials like titanium offer lightweight advantages, making diaphragm couplings suitable for aerospace and other weight-sensitive applications.
- Vibration Damping: Elastomeric materials provide excellent vibration dampening properties, reducing vibrations and noise in certain applications.
Manufacturers carefully select the appropriate material based on the specific requirements of the application to ensure optimal performance and reliability of the diaphragm coupling in a wide range of industries.
Design Considerations for Selecting a Diaphragm Coupling for a Specific Application
When choosing a diaphragm coupling for a particular application, several crucial design considerations should be taken into account. Each application has unique requirements, and selecting the right diaphragm coupling can significantly impact the overall performance and reliability of the system. Here are the key design considerations:
- 1. Torque Capacity:
- 2. Misalignment Tolerance:
- 3. Speed and RPM:
- 4. Operating Environment:
- 5. Space Constraints:
- 6. Maintenance Requirements:
- 7. Application-specific Factors:
Determine the maximum torque that the diaphragm coupling will need to transmit in the application. Select a diaphragm coupling with a torque capacity that comfortably exceeds the application’s peak torque requirements. Consider potential torque variations during operation and choose a coupling that can handle the dynamic torque conditions, especially in machines with frequent start-stop cycles or load fluctuations.
Assess the potential misalignment between the connected shafts in the application. Diaphragm couplings are known for their ability to compensate for various types of misalignment, such as axial, angular, and parallel misalignment. Determine the expected misalignment angles and choose a diaphragm coupling with the appropriate misalignment capabilities to ensure smooth operation and minimize stress on the coupling and connected machinery.
Consider the rotational speed and RPM (revolutions per minute) requirements of the application. Diaphragm couplings are suitable for high-speed applications due to their balanced design and ability to dampen vibrations. Ensure that the selected coupling can handle the required RPM without encountering critical speed issues or exceeding its rated limitations.
Evaluate the environmental conditions in which the diaphragm coupling will operate. Consider factors such as temperature, humidity, presence of corrosive substances, and exposure to contaminants. Choose a diaphragm coupling made from materials suitable for the specific operating environment to prevent corrosion and premature wear.
Diaphragm couplings have a compact design, making them suitable for applications with limited space. Consider the available installation space and choose a coupling that fits within the available dimensions while providing the required torque capacity and misalignment compensation.
Assess the maintenance requirements of the diaphragm coupling. Some couplings may require periodic lubrication, while others are maintenance-free. Choose a coupling with maintenance requirements that align with the resources and capabilities of the maintenance team.
Consider any unique factors relevant to the application, such as the presence of shock loads, dynamic balancing requirements, or the need for precision in high-accuracy systems. These specific factors can influence the selection of the most suitable diaphragm coupling for the application.
By carefully considering these design factors, engineers and designers can select the most appropriate diaphragm coupling for a specific application. The right coupling choice will enhance the overall performance, reliability, and service life of the machinery or equipment in which it is employed.
Advantages of Diaphragm Coupling Compared to Other Types of Couplings
A diaphragm coupling offers several advantages over other types of couplings, making it a popular choice for various applications. Here are some of the key advantages:
- Torsional Flexibility: Diaphragm couplings provide excellent torsional flexibility, allowing them to compensate for angular, parallel, and axial misalignment between shafts. This flexibility helps in reducing stress on connected equipment and extends their lifespan.
- No Backlash: Unlike some other couplings, diaphragm couplings have no backlash, which means there is no play or free movement between the connected shafts. This characteristic makes them suitable for applications that require precise and accurate motion transmission.
- No Lubrication: Diaphragm couplings are typically maintenance-free since they do not require any lubrication. This reduces the overall maintenance costs and simplifies the operation of the mechanical system.
- High Torque Capacity: Despite their flexible design, diaphragm couplings can handle high torque loads efficiently. This makes them suitable for heavy-duty applications where high power transmission is required.
- Vibration Damping: The flexibility of the diaphragm in the coupling helps in absorbing and dampening vibrations, reducing the risk of damage to connected machinery and improving the overall system’s performance.
- Compact Size: Diaphragm couplings are generally compact and lightweight compared to some other coupling types. This feature makes them suitable for applications with limited space or weight constraints.
- Corrosion Resistance: Diaphragm couplings made from appropriate materials offer excellent corrosion resistance, making them suitable for use in harsh environments or industries where corrosion is a concern.
- Fail-Safe Design: Diaphragm couplings have a fail-safe design, meaning that in the event of diaphragm failure, they do not lead to catastrophic coupling failure. This enhances the safety and reliability of the mechanical system.
- Cost-Effectiveness: Considering their low maintenance requirements, long service life, and efficient torque transmission, diaphragm couplings offer a cost-effective solution for various applications.
In conclusion, diaphragm couplings provide significant advantages over other types of couplings, including torsional flexibility, zero backlash, no lubrication needs, high torque capacity, vibration damping, compact size, corrosion resistance, fail-safe design, and cost-effectiveness. These features make them a preferred choice in a wide range of mechanical systems and industrial applications.
editor by CX 2024-04-25