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The SWC-DH Short Flex Welding Type Universal Coupling, produced by HZPT, is engineered to link misaligned shafts in rigorous heavy-duty applications, such as rolling mills, hoists, and steel processing equipment. Featuring a streamlined design with gyration diameters spanning 45 mm to 390 mm, this short flex universal coupling manages angular misalignments up to 25 degrees while facilitating effective torque transmission, reaching capacities of 1000 kN·m. Constructed from durable 35CrMo steel and incorporating four needle bearings, it guarantees steadfast operation under substantial stresses, positioning it as an excellent option for universal couplings in industrial machinery and welded universal couplings in heavy equipment. The short-flex architecture is particularly suitable for installations with restricted axial displacement, providing a resilient solution for challenging industrial settings.
HZPT’s manufacturing processes in China, certified under ISO 9001, ensure that the SWC-DH universal coupling adheres to rigorous quality criteria, enhanced by a chrome-plated cross shaft for superior corrosion protection and longevity in adverse environments. The welded yoke configuration streamlines assembly, necessitating accurate shaft positioning for maximum efficacy, and integrates seamlessly with systems in metallurgy, mining, and crane operations. Offered in diverse dimensions and torque specifications, this customizable universal coupling for harvesters and additional machinery can be adapted to precise requirements at economical rates. HZPT’s specialized knowledge yields a robust short flex coupling that reduces operational interruptions and enhances machinery dependability.

Product Specification

| No. | Gyration diameter D mm | Nominal torque Tn KN·m | Axes fold angle β (°) | Weary torque Tf KN·m | Flex quantity Ls mm | Size (mm) | Rotating inertia kg.m2 | Weight (kg) | |||||||||||
| Lmin | D1 (js11) | D2 (H7) | D3 | Lm | n-d | k | t | b (h9) | g | Lmin | Increase 100mm | Lmin | Increase 100mm | ||||||
| SWC180DH1 | 180 | 20 | 10 | ≤25 | 75 | 650 | 155 | 105 | 114 | 110 | 8-17 | 17 | 5 | – | – | 0.165 | 0.0070 | 58 | 2.8 |
| SWC180DH2 | 55 | 600 | 0.162 | 56 | |||||||||||||||
| SWC180DH3 | 40 | 550 | 0.160 | 52 | |||||||||||||||
| SWC225DH1 | 225 | 40 | 20 | ≤15 | 85 | 710 | 196 | 135 | 152 | 120 | 20 | 5 | 32 | 9.0 | 0.415 | 0.0234 | 95 | 4.9 | |
| SWC225DH2 | 70 | 640 | 0.397 | 92 | |||||||||||||||
| SWC250DH1 | 250 | 63 | 31.5 | ≤15 | 100 | 795 | 218 | 150 | 168 | 140 | 8-19 | 25 | 6 | 40 | 12.5 | 0.900 | 0.0277 | 148 | 5.3 |
| SWC250DH2 | 70 | 735 | 0.885 | 136 | |||||||||||||||
| SWC285DH1 | 285 | 90 | 45 | ≤15 | 120 | 950 | 245 | 170 | 194 | 160 | 8-21 | 27 | 7 | 40 | 15.0 | 1.876 | 0.0510 | 229 | 6.3 |
| SWC285DH2 | 80 | 880 | 1.801 | 221 | |||||||||||||||
| SWC315DH1 | 315 | 125 | 63 | ≤15 | 130 | 1070 | 280 | 185 | 219 | 180 | 10-23 | 32 | 8 | 40 | 15.0 | 3.331 | 0.0795 | 346 | 8.0 |
| SWC315DH2 | 90 | 980 | 3.163 | 334 | |||||||||||||||
| SWC350DH1 | 350 | 180 | 90 | ≤15 | 140 | 1170 | 310 | 210 | 267 | 194 | 10-23 | 35 | 8 | 50 | 16.0 | 6.215 | 0..2219 | 508 | 15.0 |
| SWC350DH2 | 90 | 1070 | 5.824 | 485 | |||||||||||||||
| SWC390DH1 | 390 | 250 | 125 | ≤15 | 150 | 1300 | 345 | 235 | 267 | 215 | 10-25 | 40 | 8 | 70 | 18.0 | 11.125 | 0.2219 | 655 | |
| SWC390DH2 | 90 | 1200 | 10.763 | 600 | |||||||||||||||
* 1. Tf-under the alternation load the torque which permits according to the fatigue strength.
* 2. Lmin-the least length after the cut.
* 3. L-install length, which is according to the requirement.
Scope of Application for SWC Universal Joint Coupling
The SWC universal joint coupling, often designated as the SWC cardan shaft universal joint coupling, functions as an essential element in heavy-duty industrial sectors, such as rolling mills, hoisting equipment, and a range of durable heavy machinery systems. This high-torque universal joint coupling proficiently connects two transmission shafts with non-aligned axes, enabling continuous power transmission under rigorous operational demands.
Essential specifications include:
- Gyration diameter: φ58 – φ620
- Nominal torque: 0.15 – 1000 kN·m
- Axis fold angle: ≤25°
This product is especially appropriate for applications requiring a dependable heavy-duty universal joint coupling for rolling mill processes or a resilient SWC universal joint shaft coupling in lifting and material handling systems, where it exhibits superior ability to sustain operational stability during intense loading conditions.
Structural Features of SWC Universal Joint Coupling
The SWC universal joint coupling integrates advanced engineering methodologies to achieve exceptional performance and prolonged resilience in industrial environments. The following delineates its primary structural characteristics:
- Reasonable and Safe Configuration: Featuring a unified fork head structure, this industrial universal joint coupling reduces hazards associated with bolt detachment or breakage, thereby enhancing structural strength by 30%-50%. This arrangement promotes secure and reliable operation, extending lifespan beyond conventional designs and averting common failures in high-pressure scenarios, such as heavy machinery universal joint coupling systems.
- Enhanced Load-Bearing Capacity: Engineered to support significant masses, the SWC heavy-duty universal joint coupling is vital in contexts demanding advanced load handling, including mining or construction equipment.
- High Transmission Efficiency: Attaining efficiency rates of up to 98.6%, this efficient universal joint coupling for substantial power transmission markedly lowers energy consumption and related expenditures, establishing it as a leading choice for energy-efficient universal joint coupling options in high-capacity industrial transmission structures.
- Smooth and Low-Noise Operation: Providing steady transmission with noise levels generally between 30-40 dB(A), the low-noise universal joint coupling ensures quiet functionality, rendering it ideal for acoustically sensitive industrial locations while maintaining high reliability standards.
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Advantages of Universal Joint Coupling
The universal joint coupling, exemplified by the SWC cardan shaft universal joint coupling, delivers multiple merits that render it an essential feature in industrial settings. Outlined below are its principal advantages, underscoring its advanced functionality in assorted applications.
- Superior Torque Transmission and Misalignment Compensation: This high-torque universal joint coupling adeptly handles considerable power transfers while accommodating angular, axial, and radial deviations up to 25 degrees. For instances involving reliable heavy-duty universal joint coupling in rolling mill activities, it assures continuous power delivery while preserving system coherence, thus diminishing the potential for equipment failures amid challenging circumstances.
- Enhanced Durability and Longevity: Engineered using sturdy components and integrated fork head architectures, the durable SWC universal joint shaft coupling in elevation and material handling apparatus endures intense forces and rigorous surroundings, extending service duration by averting issues like bolt detachment. This industrial universal joint coupling achieves a 30%-50% elevation in overall fortitude relative to standard variants, making it optimal for sustained utilization within heavy machinery universal joint coupling configurations.
- Optimal Efficiency and Energy Savings: Attaining efficiencies of up to 98.6% in transmission, the SWC heavy-duty universal joint coupling substantially curtails energy utilization, establishing it as a proficient universal joint coupling for substantial power conveyance. Organizations in search of energy-conserving universal joint coupling mechanisms profit from decreased operational expenditures, particularly within high-power industrial transmissions demanding precision and nominal losses.
- Quiet and Smooth Operation: With acoustics controlled at 30-40 dB(A), the low-noise universal joint coupling fosters a less noisy operational space, conforming to exacting industrial norms. This characteristic strengthens reliability in sound-sensitive contexts, supporting unwavering performance free from disturbing tremors.

Application of SWC-DH Short Flex Welding Type Universal Coupling
The SWC-DH short flex welding type universal joint coupling, frequently denoted as the SWC cardan shaft universal joint coupling, is chiefly utilized in heavy machinery contexts, including rolling mills and hoists, where a compact form and adaptability are crucial for optimal functionality. This high-torque universal joint coupling proficiently joins two transmission shafts with non-aligned axes, enabling consistent power conveyance in rigorous industrial settings that demand accurate compensation for misalignments.
It is particularly well-suited for applications requiring a dependable heavy-duty universal joint coupling in rolling mill processes or a resilient SWC universal joint shaft coupling for lifting and material handling systems, where it demonstrates excellence in upholding operational equilibrium under severe stresses, especially in constrained spaces that call for abbreviated flexible structures.
The SWC-DH industrial universal joint coupling incorporates sophisticated engineering to achieve exceptional efficacy and sustained durability within industrial frameworks. Its key structural elements feature a logical and secure arrangement with a unified fork head design, which mitigates susceptibilities related to bolt detachment or failure, thereby increasing overall structural robustness by 30%-50%. This configuration ensures safe and steady performance, surpassing conventional designs in lifespan and preventing frequent malfunctions in high-tension scenarios, such as heavy machinery universal joint coupling systems.
Moreover, it furnishes improved load-bearing proficiency, designed to accommodate greater masses, rendering the SWC heavy-duty universal joint coupling appropriate for settings necessitating strong load management, including mining or construction apparatus. Attaining transmission efficiencies of up to 98.6%, this proficient universal joint coupling for extensive power transmission substantially curtails energy usage and associated expenditures, establishing it as a preferred selection for energy-efficient universal joint coupling options in high-capacity industrial transmissions.
In conclusion, with uniform transmission and acoustic levels generally at 30-40 dB(A), the low-noise universal joint coupling delivers muted operation, suitable for acoustically sensitive industrial environments while maintaining rigorous reliability standards.
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