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Shaft Couplings

ISL Products International offers a robust range of high-quality shaft couplings engineered to efficiently connect drive elements and transmit power seamlessly between shafts. Our couplings are designed to ensure uninterrupted operation while accommodating shaft misalignment and reducing shock loads. With advanced torque-limiting features, select models can disconnect to protect your equipment when excessive torque is detected.

Key Benefits:

  • Efficient Power Transfer: Reliable transmission of power from one shaft to another without interruption.
  • Versatile Connectivity: Ideal for connecting motors, generators, and other critical drive components.
  • Mechanical Flexibility: Accommodates shaft misalignment, reducing vibration and shock load transmission.
  • Overload Protection: Torque-limiting designs disconnect to safeguard against overload.
  • Customized Solutions: Available in various types including rigid, flexible/compensating, and clutch couplings to suit diverse applications.

Whether you’re enhancing automotive drive systems or optimizing industrial machinery, our range of shaft couplings provides the durability and performance you need. Explore our catalog or contact our experts to find the ideal coupling solution for your application.

NamePrice (USD)Shaft Bore Diameter A (mm)Shaft Bore Diameter B (mm)Overall LengthOverall DiameterCoupler MaterialBushing MaterialMax. Speed Rating (rpm)Max. Torque Rating (rpm)Clamping Screw Type
https://shop.islproducts.com/wp-content/uploads/2025/02/mtl-cplr-6x6_640px.png2500CPLR-FJ-8-10-30-25-AL-P8mm x 10mm Flexible Jaw Coupling17.558103025AluminumPolyurethane150001.0x10-6 kg.cm2M3Flexible Jaw CouplingCPLR-FJ-8-10-30-25-AL-PMTL-CPLR-8X10
https://shop.islproducts.com/wp-content/uploads/2025/02/mtl-cplr-6x6_640px.png2501CPLR-FJ-6-12-30-25-AL-P6mm x 12mm Flexible Jaw Coupling17.556123025AluminumPolyurethane150001.0x10-6 kg.cm2M3Flexible Jaw CouplingCPLR-FJ-6-12-30-25-AL-PMTL-CPLR-6X12
https://shop.islproducts.com/wp-content/uploads/2025/02/mtl-cplr-6x6_640px.png2502CPLR-FJ-8-8-30-25-AL-P8mm x 8mm Flexible Jaw Coupling17.55883025AluminumPolyurethane150001.0x10-6 kg.cm2M3Flexible Jaw CouplingCPLR-FJ-8-8-30-25-AL-PMTL-CPLR-8X8
https://shop.islproducts.com/wp-content/uploads/2025/02/mtl-cplr-6x6_640px.png2503CPLR-FJ-6-10-30-25-AL-P6mm x 10mm Flexible Jaw Coupling17.556103025AluminumPolyurethane150001.0x10-6 kg.cm2M3Flexible Jaw CouplingCPLR-FJ-6-10-30-25-AL-PMTL-CPLR-6X10
https://shop.islproducts.com/wp-content/uploads/2025/02/mtl-cplr-6x6_640px.png2504CPLR-FJ-6-8-30-25-AL-P6mm x 8mm Flexible Jaw Coupling17.55683025AluminumPolyurethane150001.0x10-6 kg.cm2M3Flexible Jaw CouplingCPLR-FJ-6-8-30-25-AL-PMTL-CPLR-6X8
https://shop.islproducts.com/wp-content/uploads/2025/02/mtl-cplr-6x6_640px.png2505CPLR-FJ-8-12-30-25-AL-P8mm x 12mm Flexible Jaw Coupling17.558143025AluminumPolyurethane150001.0x10-6 kg.cm2M3Flexible Jaw CouplingCPLR-FJ-8-12-30-25-AL-PMTL-CPLR-8X12
https://shop.islproducts.com/wp-content/uploads/2025/02/mtl-cplr-6x6_640px.png2506CPLR-FJ-10-10-30-25-AL-P10mm x 10mm Flexible Jaw Coupling17.5510103025AluminumPolyurethane150001.0x10-6 kg.cm2M3Flexible Jaw CouplingCPLR-FJ-10-10-30-25-AL-PMTL-CPLR-10X10
https://shop.islproducts.com/wp-content/uploads/2025/02/mtl-cplr-6x6_640px.png2507CPLR-FJ-12-12-30-25-AL-P12mm x 12mm Flexible Jaw Coupling17.5512123025AluminumPolyurethane150001.0x10-6 kg.cm2M3Flexible Jaw CouplingCPLR-FJ-12-12-30-25-AL-PMTL-CPLR-12X12
https://shop.islproducts.com/wp-content/uploads/2025/02/mtl-cplr-6x6_640px.png2508CPLR-FJ-6-6-30-25-AL-P6mm x 6mm Flexible Jaw Coupling17.55663025AluminumPolyurethane150001.0x10-6 kg.cm2M3Flexible Jaw CouplingCPLR-FJ-6-6-30-25-AL-PMTL-CPLR-6X6
https://shop.islproducts.com/wp-content/uploads/2025/02/mtl-cplr-6x6_640px.png2509CPLR-FJ-10-12-30-25-AL-P10mm x 12mm Flexible Jaw Coupling17.5510123025AluminumPolyurethane150001.0x10-6 kg.cm2M3Flexible Jaw CouplingCPLR-FJ-10-12-30-25-AL-PMTL-CPLR-10X12

Frequently Asked Questions

What are shaft couplings used for in DC motor systems?

Shaft couplings connect the DC motor's shaft to other components, allowing for the transmission of rotary motion and torque. In DC motor systems, they're essential for connecting the motor to lead screws, sensors, and other driven components. For example, a reliable shaft coupling, like a flexible jaw coupling, is often chosen to connect a DC motor component to a lead screw in a linear actuator.

Why are shaft couplings important for DC motor accessories?

They ensure efficient and reliable power transfer, accommodate misalignment between shafts, reduce vibration and shock, and protect both the motor and driven components from damage. This is critical for the accuracy and longevity of DC motor systems and their accessories. A well-selected coupling, such as a flexible jaw coupling, can significantly improve the performance and lifespan of DC motor driven systems.

What types of shaft couplings are commonly used with DC motors?

Common types include:

  • Flexible Jaw Couplings: Accommodate misalignment, dampen vibration, and are a popular choice for many DC motor applications.
  • Rigid Couplings: Provide precise alignment for high-torque applications.
  • Bellows Couplings: Offer high torsional stiffness and low backlash for precise motion control.
  • Oldham Couplings: Accommodate parallel misalignment.
  • Servo Couplings: Designed for high-precision servo motor applications.
  • Beam Couplings: Single piece couplings with high torsional stiffness.

How do I choose the right shaft coupling for my DC motor application?

Consider these factors:

  • Torque Requirements: Match the coupling's torque rating to the motor's output. For many general purpose applications a flexible jaw coupling will be sufficient.
  • Shaft Sizes: Ensure the coupling's bore matches the motor and driven component shafts.
  • Misalignment: Select a coupling that can accommodate the expected misalignment. Flexible jaw couplings are excellent for this.
  • Speed: Ensure the coupling's maximum speed rating is sufficient.
  • Application Requirements: Consider backlash, torsional stiffness, and environmental factors.
  • Vibration and Shock: choose a coupling that can dampen those forces. A flexible jaw coupling is great at dampening these forces.

What is the difference between a rigid and flexible shaft coupling?

Rigid couplings provide a fixed, non-flexible connection, ideal for precise alignment and high torque. They offer zero misalignment accommodation.

Flexible couplings allow for some degree of misalignment, reducing stress on bearings and shafts. They also help dampen vibration and shock. Flexible jaw couplings are a common type of flexible coupling.

How does misalignment affect a DC motor system?

Misalignment can lead to:

  1. Premature bearing and shaft wear.
  2. Increased vibration and noise.
  3. Reduced system efficiency.
  4. Potential component failure. Using a flexible jaw coupling will greatly reduce these risks.

What is backlash in a shaft coupling, and why does it matter for DC motors?

Backlash is the amount of play or free movement between the coupling's components. In DC motor systems, especially those requiring precise positioning (like servo systems), backlash can cause inaccuracies and reduce system performance. While flexible jaw couplings do have some backlash, selecting the correct spider material can minimize it.

Can shaft couplings help reduce vibration in DC motor systems?

Yes, flexible couplings, in particular, are designed to dampen vibration and shock loads, improving system stability and reducing noise. Flexible jaw couplings are very effective at this.

What materials are shaft couplings made from?

Common materials include:

  • Steel: For high-torque applications.
  • Aluminum: For lightweight applications.
  • Stainless steel: For corrosion resistance.
  • Elastomers (for flexible couplings): Urethane, Hytrel, NBR. Flexible jaw couplings utilize these elastomers in their spiders.

 How do I install a shaft coupling on a DC motor?

Installation typically involves:

  • Cleaning the shafts.
  • Sliding the coupling hubs onto the shafts.
  • Aligning the components.
  • Securing the hubs with set screws or clamping screws, according to the manufacturer's specifications. The installation of a flexible jaw coupling is very simple.