L-Jaw Couplings
L-Series jaw coupling is offered in a large variety of bore and key options, as well as splines. These couplings are designed for a range of different applications using electrical motors as well as internal combustion engines. This design offers a standard shaft-to-shaft connection ideal for many industrial applications. Additionally, they are interchangeable with other brands, enhancing their versatility and compatibility. By adding this product to our extensive lineup of power transmission products, we aim to provide our customers with a comprehensive and cost-effective solution for their needs.
L-Series jaw coupling is offered in a large variety of bore and key options, as well as splines. These couplings are designed for a range of different applications using electrical motors as well as internal combustion engines. This design offers a standard shaft-to-shaft connection ideal for many industrial applications. Additionally, they are interchangeable with other brands, enhancing their versatility and compatibility. By adding this product to our extensive lineup of power transmission products, we aim to provide our customers with a comprehensive and cost-effective solution for their needs. Trust in our L-Series jaw coupling to deliver reliable performance and seamless integration in your industrial operations.
L-Jaw Coupling Size Chart
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| Part No. | Style No. | Bore Min Max | A | B | C | D | E | |
|---|---|---|---|---|---|---|---|---|
| L035 | 1 | 3.2 | 9.5 | 16.0 | 20.6 | 6.9 | - | 7.1 |
| L050 | 1 | 6.4 | 15.g | 27.4 | 43.4 | 15.7 | - | 12.2 |
| L070 | 1 | 6.4 | 19.1 | 34.5 | 50.3 | 19.1 | - | 12.2 |
| L075* | 1 | 6.4 | 22.2 | 44.5 | 54.1 | 20.8 | - | 12.7 |
| L095* | 1 | 11.1 | 28.6 | 53.6 | 63.8 | 25.4 | - | 13.2 |
| L100* | 1 | 11.1 | 35.0 | 64.5 | 88.4 | 35.1 | - | 18.0 |
| L110* | 1 | 15.9 | 42.0 | 84.3 | 107.2 | 42.7 | - | 22.4 |
| L150* | 1 | 15.9 | 48.0 | 95.3 | 114.3 | 44.5 | - | 25.4 |
| L190 | 2 | 19.1 | 55.0 | 114.3 | 123.4 | 49.3 | 101.6 | 25.4 |
| L225 | 2 | 19.1 | 66.7 | 127.0 | 135.6 | 55.4 | 108.0 | 25.4 |
| L276 | 2 | 22.2 | 71.9 | 157.0 | 198.6 | 79.2 | 127.0 | 40.1 |
Key Features of the L-Jaw Couplings
L-Jaw couplings, a type of jaw coupling widely used in power transmission applications, are known for their versatility and reliability. Here are the key features of L-Jaw couplings:
- Three-Piece Design: L-Jaw couplings consist of two metallic hubs and an elastomeric insert, often called a "spider." The hubs have jaws that interlock with the lobes of the spider, allowing for a simple yet effective torque transmission mechanism.
- Torque Transmission via Compression: The elastomer spider transmits torque by being compressed between the jaws of the hubs. This design enhances load capacity and durability compared to shear-type couplings.
- Misalignment Accommodation: They can handle angular misalignment (typically up to 1 degree) and parallel misalignment (up to approximately 0.015 inches), protecting connected equipment from stress due to shaft misalignment.
- Vibration Damping: The elastomeric spider absorbs vibrations and shocks, reducing wear on machinery components and improving system longevity.
- Fail-Safe Operation: If the spider fails or wears out, the hubs’ jaws can interlock directly, allowing the coupling to continue transmitting torque. This fail-safe feature ensures operation continuity, though without damping, until maintenance can be performed.
- No Lubrication Required: L-Jaw couplings operate without the need for lubrication, making them low-maintenance and resistant to contaminants like oil, dirt, moisture, and grease.
- Customizable Elastomer Options: The spider can be made from various materials (e.g., NBR rubber, urethane, Hytrel®, or bronze) with different hardness levels. This allows users to tailor the coupling’s performance—such as torque capacity, damping ability, or temperature resistance—to specific application needs.
- Wide Range of Sizes and Bores: Available in numerous sizes, L-Jaw couplings support shaft diameters from as small as 1/8 inch up to 7 inches and torque ratings from a few in-lbs to over 170,000 in-lbs, accommodating diverse industrial requirements.
- Versatility: Suitable for a variety of applications, including pumps, gearboxes, compressors, and conveyors, driven by electric motors or internal combustion engines, making them a go-to choice for general-purpose industrial use.
Applications of the L-Jaw Couplings
L-Jaw Couplings, specifically the L-Type Jaw Couplings from Lovejoy, are widely used in various industrial applications due to their versatility, reliability, and ability to handle misalignment. These couplings are designed for general-purpose power transmission and are particularly effective in connecting rotating shafts in machinery. Here are some key applications:
- Pumps: L-Jaw Couplings are commonly used to connect electric motors to centrifugal pumps, ensuring efficient torque transfer while accommodating minor shaft misalignments. This is critical in water treatment, irrigation, and industrial fluid management systems.
- Gearboxes: In machinery requiring speed reduction or torque multiplication, such as conveyors or heavy equipment, these couplings link motors to gearboxes, providing a fail-safe operation and reducing wear on components.
- Compressors: For air or gas compressors, L-Jaw Couplings transmit power reliably from motors to compressor units, handling light to medium-duty loads and maintaining performance even if the elastomeric spider fails.
- Blowers and Fans: These couplings are ideal for connecting motors to blowers or fans in HVAC systems, industrial ventilation, or material handling, where consistent power delivery and misalignment tolerance are essential.
- Mixers: In industries like food processing, chemical manufacturing, or pharmaceuticals, L-Jaw Couplings drive mixers, offering resistance to contaminants like oil, grease, or moisture, and ensuring smooth operation.
- Conveyors: Used in material handling systems, such as belt or roller conveyors, these couplings connect motors to drive rollers, supporting continuous operation and absorbing shock loads.
- General Industrial Machinery: L-Jaw Couplings serve as a standard shaft-to-shaft connection for a wide range of light to medium-duty electrical motor-driven equipment, making them a go-to choice for various industrial setups.
L-Jaw Coupling Installation Steps
Installing an L-jaw coupling is a straightforward process, but it requires careful attention to ensure proper alignment and secure connections. Below are the general steps for installing an L-jaw coupling, commonly used to connect two shafts for power transmission in machinery:
- Clean Shafts and Hubs: Thoroughly clean the shafts and the inner bores of the coupling hubs using a suitable solvent or cloth. Remove any dirt, grease, or rust to ensure a secure, friction-free fit between the components.
- Install Hubs on Shafts: Slide the first hub onto the end of one shaft, ensuring it fits snugly. Align the hub so the set screw or keyway matches the shaft’s key, if present. Repeat for the second hub on the other shaft.
- Secure Hubs: Tighten the set screws on each hub using the appropriate tool, typically an Allen wrench, to firmly anchor them to the shafts. If using a keyed shaft, ensure the key is properly seated before tightening.
- Insert Spider: Place the elastomeric spider into the jaws of one hub. Ensure it sits evenly and fully within the jaw recesses, as this component cushions misalignment and transmits torque between the hubs.
- Align Shafts: Bring the two shafts together, aligning them as precisely as possible. Check axial, angular, and parallel alignment using a straightedge or dial indicator to minimize stress on the coupling during operation.
- Engage Second Hub: Slide the second hub’s jaws over the spider, ensuring the spider’s legs fit securely into the corresponding recesses. Adjust the shaft positions if necessary to achieve full engagement without forcing the components.
- Check Gap and Alignment: Verify the gap between the hubs matches the manufacturer’s specifications, typically a small clearance to allow for thermal expansion. Recheck alignment to ensure no misalignment occurred during assembly.
- Tighten All Fasteners: Double-check and fully tighten all set screws or clamping bolts on both hubs. Use a torque wrench if specified by the manufacturer to apply the correct torque, ensuring a firm connection.
- Test Operation: Rotate the assembly by hand to confirm smooth movement with no binding or excessive play. Once satisfied, connect the system to power and run a brief test to verify proper function under load.
Additional information
| Edited by | Yjx |
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