China Best Sales Star Type Rubber Flexible Shaft Spider Jaw Coupling Plum Coupling Servo Motor

Product Description

XL Star Type Rubber Flexible Jaw Coupling Flexible Plum Coupling 


The plum CHINAMFG coupling is closely combined with the main body of the 2 half coupling with polyurethane plastic as the elastic element, and the main body is mainly made of imported alloy aluminum. It is applicable to servo system, spindle drive, lifting platform, machine tool drive and gearbox motor. Compact, no backlash, 3 different hardness elastomers are provided, which can absorb vibration and compensate radial and angular deviation. It is mainly suitable for working places with frequent starting, CHINAMFG and reverse rotation, medium high speed, medium torque and high reliability. 



Type Torque Tn (N.m) Max Speed [n] (r/min) Shaft hole DIA di dz Hole Length L D D: Dz E S
XL1 34 19000 6-19-24 25 40 32 40 16 2
XL2 120 14000 8-24-28 30 55 40 55 18 2
XL3 320 11800 10-28-38 35 65 48 65 20 2.5
XL4 650 9500 12-38-45 45 80 66 78 24 3
XL5 900 8000 14-42-55 50 98 75 94 26 3
XL6 1050 7100 1548-60 56 105 85 104 28 3.5
XL7 1250 6300 20-55-70 65 120 98 118 30 4
XL8 1280 5600 22~65-75 75 135 115 134 35 4.5
XL9 2930 4750 30-75-90 85 160 135 158 40 5
XL10 7200 3750 40-90-100 100 200 160 180 45 5.5
XL11 9900 3350 50-100-110 110 225 180 200 50 6
XL12 12000 3000 60-110-125 120 255 200 230 55 6.5
XL13 15000 2650 60-125-145 140 290 230 265 60 7
XL14 22000 2360 60-140-165 155 320 255 300 65 7.5
XL15 30000 2000 80-160-190 175 370 290 345 75 9
XL16 35000 1800 85-180-220 195 420 325 400 85 10.5


1. Elastic plum-shaped flexible coupling.

2. During transmission, it can realize zero backlash torque transmission torque under low torque state.

3. The elastic spacer is made of polyurethane, and the torque exceeds the traditional claw coupling by more than 2 times.

4. Plum CHINAMFG elastomer can resist oil and electrical insulation, operating temperature: -20ºC~80ºC.

5. Excellent elastic effect to absorb vibration, eccentricity and deflection.

6. If there are multiple deviations, the allowable value of a single deviation will be reduced.

jaw coupling

Maintenance-Free Options for Jaw Couplings

Jaw couplings typically require minimal maintenance due to their simple and robust design. However, there are maintenance-free options available that further reduce the need for regular maintenance. Here are some maintenance-free options for jaw couplings:

  • Lubrication-Free: Some jaw couplings are designed with materials that do not require lubrication. These couplings often use self-lubricating materials for the elastomeric spider, which eliminates the need for periodic lubrication. This feature is particularly advantageous in applications where regular maintenance is difficult or impractical.
  • Sealed Design: Certain jaw couplings come with a sealed design that prevents contaminants from entering the coupling. The seal protects the internal components, such as the elastomeric spider and the jaws, from dust, dirt, and moisture. As a result, these couplings have an extended service life and require less maintenance.
  • Corrosion-Resistant Materials: In harsh or corrosive environments, jaw couplings made from materials such as stainless steel or other corrosion-resistant alloys can be used. These materials offer excellent resistance to corrosion and wear, reducing the risk of coupling failure and minimizing the need for maintenance and replacement.
  • Composite Spider: Some jaw couplings feature a composite spider made from advanced materials that offer high strength and durability. These composite spiders are resistant to wear, fatigue, and chemical exposure, resulting in longer service life and less maintenance.

It’s important to note that while these maintenance-free options can significantly reduce the need for regular maintenance, all couplings may still require periodic inspection to ensure they remain in good working condition. Regular visual checks for wear, damage, or misalignment can help identify potential issues before they become severe problems.

Choosing a maintenance-free jaw coupling can be beneficial in applications where downtime and maintenance costs must be minimized, or in environments where regular maintenance is challenging to perform.

jaw coupling

Can jaw couplings be used in servo motor and stepper motor applications?

Yes, jaw couplings can be used in both servo motor and stepper motor applications, and they are commonly employed in such systems. The key factors that make jaw couplings suitable for these motor types are their ability to handle misalignment, their torsional flexibility, and their compact and lightweight design.

In servo motor applications, jaw couplings are chosen for their high precision and responsiveness. Servo motors require couplings that can transmit torque with minimal backlash and provide accurate motion control. Jaw couplings achieve this by maintaining a tight fit between the elastomer spider and the coupling hubs, minimizing backlash and ensuring precise torque transmission. The elastomer spider also dampens vibrations and shocks, contributing to smoother motor operation and increased system stability. Additionally, the compact size and low inertia of jaw couplings make them ideal for high-speed servo motor applications where quick acceleration and deceleration are crucial.

In stepper motor applications, jaw couplings are preferred for their ability to handle misalignment. Stepper motors often have shaft misalignment due to manufacturing tolerances or other factors, and jaw couplings can accommodate both angular and parallel misalignment without imposing significant additional loads on the motor bearings. This helps to reduce wear and extend the life of the motor and coupling components. Moreover, stepper motors are commonly used in open-loop systems, where precise positioning and motion control are essential. Jaw couplings’ low backlash characteristics aid in achieving accurate positioning and eliminating any motion inaccuracies that might arise due to backlash in the coupling.

Overall, jaw couplings are well-suited for servo motor and stepper motor applications due to their precision, ability to handle misalignment, torsional flexibility, and low inertia. When selecting a jaw coupling for a specific motor application, it is essential to consider factors such as torque requirements, operating conditions, and motor specifications to ensure optimal performance and reliability in the system.

jaw coupling

What is a Jaw Coupling and How Does It Work?

A jaw coupling is a type of mechanical coupling used to connect two shafts in machinery. It is designed to transmit torque while compensating for shaft misalignments and dampening vibrations. The coupling consists of two hubs with three curved jaws each and an elastomeric spider placed between them.

The working principle of a jaw coupling is based on the flexibility of the elastomeric spider. When the two hubs are brought together, the spider gets compressed between them. The curved shape of the jaws allows the spider to flex, accommodating angular and axial misalignments between the shafts.

During operation, when torque is applied to one shaft, it is transmitted through the spider to the other shaft, enabling power transmission. The elastomeric material of the spider also acts as a damping element, reducing vibrations and shock loads in the system.

Jaw couplings are commonly used in various applications, such as pumps, compressors, conveyors, and other power transmission systems. Their simple design, ease of installation, and ability to handle misalignments make them popular choices for connecting rotating shafts in machinery.

China Best Sales Star Type Rubber Flexible Shaft Spider Jaw Coupling Plum Coupling Servo Motor  China Best Sales Star Type Rubber Flexible Shaft Spider Jaw Coupling Plum Coupling Servo Motor
editor by CX 2023-10-08


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