| Customization: | Available |
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| Standard Or Nonstandard: | Standard |
| Shaft Hole: | Pilot Bore |
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The UNIISO L-Series Jaw Coupling stands out with its broad selection of bore and key configurations, including splines. These meticulously engineered couplings are tailored for versatile applications, seamlessly accommodating both electrical motors and internal combustion engines. With a robust design, they are perfect for standard shaft-to-shaft connections and are interchangeable with other leading domestic brands, ensuring compatibility and ease of use across various industrial applications.
Incorporating the Flexible Cast Iron Jaw Coupling with Rubber and Customized Diameter Options into our extensive range of power transmission solutions enables us to deliver a comprehensive, cost-effective product lineup to our valued customers. Crafted from sintered iron, our couplings are versatile, available with drive elements such as Buna-N, Urethane, and Hytrel, to meet diverse operational demands.
Jaw couplings serve as a versatile, all-purpose industrial power transmission device, capable of operating across varying temperatures. They adeptly handle angular misalignments and the resulting reactionary loads, resist chemical exposure, and offer excellent speed and dampening properties. Constructed from three key components - two clearance-fit tolerance hubs and an elastomeric insert - these couplings promise durability, although the inserts, also known as spiders, will eventually require replacement.
Upon insert failure, the jaw coupling's fail-safe mechanism engages, allowing the hubs to interlock and maintain load carriage, albeit without the insert's dampening benefits. This feature grants operators a critical window to promptly halt operations. It's advisable to replace both the insert and hubs swiftly to maintain system integrity, as prolonged hub-on-hub operation without an insert is suboptimal and not recommended for continued use.
Designed for low maintenance, these couplings operate efficiently without lubrication, unlike their gear, grid, or chain counterparts, which necessitate periodic grease application. As long as the insert remains intact, jaw couplings deliver reliable performance with minimal upkeep.
Traditionally, jaw couplings transmit torque by leveraging the elastomeric flexing element in compression. This method is favored for torque transmission as elastomers endure greater stress and loads in compression, efficiently managing peak load conditions compared to in-shear motion.
The standard insert for jaw couplings is crafted from solid Nitrile Butadiene (Buna N) rubber, an oil-resistant elastomer known for its natural rubber-like resilience and elasticity. It functions optimally within temperatures ranging from -40° to 212°F (-40° to 100°C), displaying high dampening capacity, good chemical resistance, and a shore hardness of 80A, making it suitable for cyclic load applications.
A notable variant of the Buna N rubber insert is the open center design. Although the closed center variant is more robust and ideal for high-speed applications, the open center is engineered for scenarios requiring minimal shaft separation where space constraints preclude a central section.
Another innovative insert variation wraps around the coupling's exterior, secured by a retaining ring, facilitating easy replacement without moving the hubs on the shaft. However, this design typically restricts usage to lower RPM speeds, sometimes limited to 1750 RPM, depending on the specific design.
Beyond standard Buna N inserts, materials like urethane, Hytrel, and Bronze are also popular for their distinct properties. Urethane, for instance, offers approximately 1.5 times the torque capability of Buna N, though it provides less dampening effect and operates within a narrower temperature range (-30° to 160°F, -34° to 71°C). While it boasts good oil and chemical resistance, its suitability is limited for cyclic or start/stop applications.
Hytrel inserts are engineered to excel in high torque and high temperature operations, operating efficiently between -60° to 250°F (-51° to 121°C). These inserts boast excellent resistance to oil and chemicals, making them ideal for demanding environments. However, they are not recommended for cyclic or start/stop applications. Generally, the angular misalignment is limited to half a degree, unlike the usual 1 degree permitted by Buna N and Urethane inserts. Despite this, their capacity to manage parallel misalignment aligns with that of Buna N and Urethane inserts, maintaining a tolerance of approximately 0.015 in.
Rigid, porous oil-impregnated bronze inserts are tailored for slow speed applications, supporting a maximum of 250 RPM while delivering high torque capabilities. These inserts showcase resilience against extreme temperatures, ranging from -40° to 450°F (-40° to 232°C), and are largely unaffected by water, oil, or dirt contamination. Similar to Hytrel inserts, they manage angular misalignment up to half a degree, though they offer reduced parallel misalignment handling, limited to 0.010 in.
Jaw couplings operate within the temperature limits dictated by the elastomeric insert. They offer modest capabilities for handling misalignment, both angular and parallel. Yet, certain applications may demand enhanced performance. The radial stiffness inherent in these couplings may lead to high reactionary loads, and for vertical applications, special hubs may be necessary if setscrews fail to keep hubs from sliding. Furthermore, traditional jaw couplings are not ideal for motion control applications due to the inherent looseness between the jaws and elastomer, which tends to compress over time.
Curved jaw couplings distinguish themselves from straight jaw variants with their uniquely curved tooth profile. This design is prevalent in Europe and widely favored in motion control applications. By utilizing a highly stiff urethane insert, a backlash-free coupling-commonly referred to as a GS or Spidex-can be achieved. However, a limitation of the curved jaw design is its inability to be converted into an in-shear design, attributable to the jaw curvature.
Q1: Are you trading company or manufacturer?
A: We are professionally manufacturer in Shanghai China and own ourself Punchingworkshop,Forging workshop & Casting-workshop, warmly welcome to visit us.
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