Core Application & Target User Demand
This catalog focuses on SWC series large and extra-large universal shafts (cardan shafts), core power transmission components exclusively compatible with heavy-duty & ultra-heavy-duty industrial equipment, including large metallurgical rolling mills (hot rolling, cold rolling), large mining excavators, offshore wind turbines, port gantry cranes, and large-scale cement kiln transmission systems. Tailored for metallurgical plant maintenance teams, heavy machinery manufacturers, mining equipment integrators, and offshore engineering contractors, it addresses critical pain points such as shaft fracture, joint wear, and transmission failure caused by extreme working conditions (ultra-high torque, continuous high load, strong vibration, harsh corrosion). The core value lies in providing high-torque-bearing, fatigue-resistant, and precision-machined universal shafts that ensure stable, efficient, and long-term power transmission, adapt to large angular misalignment between shafts, and reduce unplanned downtime of key equipment. All products comply with GB/T 12467.1-2019 (Universal Joint Shafts for Mechanical Transmission, Class AA Precision) and ISO 6336-2:2019 (Gear and Shaft Transmission Performance Standards), with partial models meeting API Spec 7K (Offshore and Mining Equipment) requirements.
1. SWC Medium-Large Size Universal Shaft Series (SWC200, SWC225, SWC250)
SWC medium-large size universal shafts are engineered for heavy-duty transmission scenarios such as medium-sized hot rolling mills, large mining conveyors, and cement kiln auxiliary systems. They feature balanced torque transmission, excellent impact resistance, and compact structure, effectively solving the problem of unstable transmission caused by moderate angular misalignment and load fluctuations. A field maintenance case: A 1500t/d cement kiln's SWC200 universal shaft suffered spline wear due to insufficient lubrication, leading to abnormal vibration. After replacing the shaft and implementing a quarterly lubrication maintenance plan, the kiln resumed stable operation for over 18 months. All products comply with GB/T 12467.1-2019 Class AA precision and ISO 6336 torque rating requirements.
Serial No. | Product Models | Material | Main Wear Reasons | Damage Prevention Notes |
1 | SWC200, SWC200BH, SWC200WH, SWC200CH, SWC200WD, SWC200WF, SWC200BF, SWC200CH1, SWC200CH2, SWC200DH1, SWC200DH2, SWC-I200, SWC-I200A, SWC200A | Shaft body: 42CrMo alloy steel (integral forging + quenched and tempered); Cross bearing: GCr15SiMn bearing steel (carburizing and quenching, hardness HRC 60-64); Universal joint fork: 42CrMo alloy steel (forging); Surface: Nitriding treatment + anti-corrosion coating; Tensile strength ≥ 1250 MPa; Rated torque range: 200-500 kN·m | 1. Spline tooth wear caused by insufficient lubrication and relative sliding under high torque; 2. Cross bearing failure due to dust and metal particle intrusion in dusty mining/cement environments | 1. Inject high-temperature lithium-based grease (NLGI 2, operating temperature -20℃~120℃) every 400 working hours; 2. Install double-layer dustproof seals at both ends and clean the lubrication circuit filter monthly |
2 | SWC225, SWC225BH, SWC225WH, SWC225CH, SWC225WD, SWC225BF, SWC225WF, SWC225CH1, SWC225CH2, SWC225DH1, SWC225DH2, SWC-I225 | Shaft body: 42CrMoV alloy steel (forging + quenched and tempered); Cross bearing: GCr15 bearing steel (ultra-precision machining + carburizing); Universal joint fork: 42CrMoV alloy steel (integral forging); Surface: Shot blasting + epoxy anti-corrosion paint; Tensile strength ≥ 1300 MPa; Rated torque range: 300-700 kN·m | 1. Universal joint fork fatigue cracking due to improper installation alignment (coaxiality error exceeding limit); 2. Shaft body corrosion caused by moisture and chemical fumes in metallurgical environments | 1. Ensure installation coaxiality error ≤ 0.05 mm and angular deflection ≤ 12°; 2. Conduct monthly surface corrosion inspection and touch-up with epoxy paint if peeling occurs |
3 | SWC250, SWC250BH, SWC250WH, SWC250WD, SWC250WF, SWC250DH, SWC250CH1, SWC250CH2, SWC250A, SWC250B, SWC250C | Shaft body: 35CrNiMo alloy steel (forging + quenched and tempered); Cross bearing: GCr15SiMn bearing steel (high-frequency quenching); Universal joint fork: 35CrNiMo alloy steel (forging); Surface: Phosphating + anti-rust wax; Tensile strength ≥ 1400 MPa; Rated torque range: 400-900 kN·m | 1. Cross shaft neck wear due to long-term alternating load in continuous rolling mill operations; 2. Seal ring aging and lubricating oil leakage in high-temperature working environments (＞100℃) | 1. Conduct magnetic particle inspection of the cross shaft every 6 months to detect fatigue cracks; 2. Replace high-temperature resistant fluoro rubber seal rings every 3 months in high-temperature scenarios |
2. SWC Large Size Universal Shaft Series (SWC285, SWC315, SWC350)
SWC large size universal shafts are designed for ultra-heavy-duty transmission in large hot rolling mills, large mining excavators (≥300t), and port gantry cranes. They boast ultra-high torque-bearing capacity, excellent fatigue resistance, and strong environmental adaptability, solving the high-risk problem of transmission system failure in key production equipment. All products meet ISO 14644-1 Class 8 cleanroom manufacturing standards and GB/T 12467.1-2019 Class AA precision. A typical application: Widely used in 2050mm hot rolling mill main transmission systems, ensuring stable power transmission under 800kN·m peak torque.
Serial No. | Product Models | Material | Main Wear Reasons | Damage Prevention Notes |
1 | SWC285, SWC285DH2, SWC285BH, SWC285WH, SWC285WD, SWC285CH1, SWC285CH2, SWC285DH1, SWC285WF, SWC285BF, SWC285A, SWC285B | Shaft body: 42CrMoV alloy steel (integral forging + quenched and tempered); Cross bearing: GCr15SiMn bearing steel (carburizing and quenching, depth 1.5-2.0mm); Universal joint fork: 42CrMoV alloy steel (one-piece forging); Surface: Nitriding treatment (layer thickness 0.3-0.5mm); Tensile strength ≥ 1500 MPa; Rated torque range: 600-1200 kN·m | 1. Nitrided layer peeling at the shaft neck due to improper disassembly/assembly scratches; 2. Cross bearing rolling element fatigue damage under long-term continuous high-load operation | 1. Use soft metal lifting tools during disassembly/assembly to avoid surface scratches; 2. Implement load monitoring and ensure operating load does not exceed 85% of rated torque |
2 | SWC315, SWC315BH, SWC315WH, SWC315WD, SWC315CH, SWC315CH1, SWC315CH2, SWC315DH1, SWC315DH2, SWC315WF, SWC315BF, SWC315A, SWC315B, SWC315C | Shaft body: 35CrNiMo alloy steel (forging + quenched and tempered); Cross bearing: GCr15 bearing steel (ultra-precision grinding + carburizing); Universal joint fork: 35CrNiMo alloy steel (integral forging); Surface: Ceramic coating + anti-corrosion oil; Tensile strength ≥ 1600 MPa; Rated torque range: 800-1500 kN·m | 1. Ceramic coating wear caused by strong vibration in mining excavator operations; 2. Lubrication failure due to lubricating oil degradation under extreme temperature changes (-30℃~150℃) | 1. Install vibration dampers at both ends of the universal shaft; 2. Use multi-grade lubricating oil (viscosity grade 15W-40) and replace it every 1500 working hours |
3 | SWC350, SWC350BH, SWC350WH, SWC350CH, SWC350DH, SWC350WF, SWC350WD, SWC350BF, SWC350DH1, SWC350DH2, SWC350CH1, SWC350CH2, SWC350A, SWC350B | Shaft body: 40CrNiMoA alloy steel (forging + quenched and tempered); Cross bearing: GCr15SiMn bearing steel (high-temperature carburizing); Universal joint fork: 40CrNiMoA alloy steel (forging); Surface: Anti-corrosion paint + shot blasting; Tensile strength ≥ 1700 MPa; Rated torque range: 1000-1800 kN·m | 1. Spline connection loosening due to high-frequency vibration in port crane operations; 2. Shaft body fatigue cracking caused by sudden impact loads (e.g., crane load hoisting impact) | 1. Check spline connection tightness every 300 working hours and apply thread locking adhesive; 2. Install overload protection devices to limit impact load within 120% of rated torque |
3. SWC Extra-Large Size Universal Shaft Series (SWC390, SWC440, SWC490)
SWC extra-large size universal shafts are specialized for ultra-heavy-duty transmission scenarios, including large offshore wind turbines (≥5MW), super-large mining excavators (≥500t), and large-scale metallurgical continuous casting machines. They feature the highest torque-bearing capacity, extreme fatigue resistance, and seawater/strong corrosion resistance, ensuring reliable power transmission in harsh offshore, mining, and metallurgical environments. All products comply with API Spec 7K (Offshore Equipment) and GB/T 12467.1-2019 Class AA precision, with strict quality control through ultrasonic flaw detection and non-destructive testing.
Serial No. | Product Models | Material | Main Wear Reasons | Damage Prevention Notes |
1 | SWC390, SWC390BH, SWC390WH, SWC390CH, SWC390DH, SWC390WF, SWC390WD, SWC390BF, SWC390A, SWC390B, SWC390C, SWC390DH1, SWC390DH2, SWC390CH1, SWC390CH2 | Shaft body: 42CrNiMoV alloy steel (integral forging + quenched and tempered); Cross bearing: GCr15SiMn bearing steel (carburizing and quenching, hardness HRC 62-65); Universal joint fork: 42CrNiMoV alloy steel (one-piece forging); Surface: Seawater-resistant anti-corrosion coating + nitriding; Tensile strength ≥ 1800 MPa; Rated torque range: 1200-2200 kN·m | 1. Seawater corrosion of the shaft body and joints in offshore wind turbine applications; 2. Cross bearing overheating due to poor heat dissipation in enclosed transmission compartments | 1. Conduct seawater corrosion inspection every month and reapply anti-corrosion coating quarterly; 2. Install forced cooling fans in enclosed compartments to maintain operating temperature ≤ 120℃ |
2 | SWC440, SWC440BH, SWC440WH, SWC440CH, SWC440DH, SWC440WF, SWC440WD, SWC440BF, SWC440DH1, SWC440DH2, SWC440CH1, SWC440CH2 | Shaft body: 35CrNiMoV alloy steel (forging + quenched and tempered); Cross bearing: GCr15 bearing steel (ultra-precision machining + carburizing); Universal joint fork: 35CrNiMoV alloy steel (integral forging); Surface: Ceramic composite coating; Tensile strength ≥ 1900 MPa; Rated torque range: 1500-2600 kN·m | 1. Ceramic coating peeling due to collision during equipment transportation/maintenance; 2. Lubricating oil contamination by metal particles from adjacent gearbox wear | 1. Use custom protective sleeves during transportation/maintenance; 2. Install a 10μm high-precision filter in the lubrication circuit and replace the filter element monthly |
3 | SWC490, SWC490BH, SWC490WH, SWC490CH, SWC490DH, SWC490WF, SWC490WD, SWC490BF, SWC490DH1, SWC490DH2, SWC490CH1, SWC490CH2 | Shaft body: 40CrNiMoV alloy steel (forging + quenched and tempered); Cross bearing: GCr15SiMn bearing steel (high-temperature carburizing and quenching); Universal joint fork: 40CrNiMoV alloy steel (forging); Surface: Anti-corrosion wax + shot blasting; Tensile strength ≥ 2000 MPa; Rated torque range: 1800-3000 kN·m | 1. Universal joint fork fatigue damage under long-term alternating load in continuous casting machines; 2. Shaft neck wear due to misalignment caused by foundation settlement of large equipment | 1. Conduct ultrasonic flaw detection of the universal joint fork every 6 months; 2. Regularly inspect equipment foundation settlement and adjust installation alignment accordingly |
4. SWC Ultra-Extra-Large Size Universal Shaft Series (SWC550, SWC620)
SWC ultra-extra-large size universal shafts are the top-tier products for the most demanding ultra-heavy-duty transmission scenarios, including super-large offshore wind turbines (≥8MW), large-scale steel mill continuous rolling mills, and super-large mining draglines. They are engineered with the highest material strength, extreme precision, and comprehensive environmental resistance, ensuring safe and stable power transmission for key equipment with the highest torque requirements. All products undergo strict quality inspection in accordance with ISO 9001:2015 quality management system and GB/T 12467.1-2019 Class AA precision standards.
Serial No. | Product Models | Material | Main Wear Reasons | Damage Prevention Notes |
1 | SWC550, SWC550BH, SWC550WH, SWC550CH, SWC550DH, SWC550WF, SWC550WD, SWC550BF, SWC550DH1, SWC550DH2, SWC550CH1, SWC550CH2 | Shaft body: 42CrNiMoV alloy steel (integral forging + quenched and tempered); Cross bearing: GCr15SiMn bearing steel (carburizing and quenching, depth 2.0-2.5mm); Universal joint fork: 42CrNiMoV alloy steel (one-piece forging); Surface: Seawater-resistant ceramic coating; Tensile strength ≥ 2200 MPa; Rated torque range: 2200-3500 kN·m | 1. Severe seawater corrosion in offshore wind turbine applications; 2. Cross bearing failure due to long-term operation under extreme low-temperature conditions (-40℃) | 1. Apply anti-corrosion primer + topcoat twice a year for offshore applications; 2. Use low-temperature resistant lubricating grease (NLGI 2, operating temperature -40℃~120℃) |
2 | SWC620, SWC620BH, SWC620DH, SWC620CH, SWC620WH, SWC620WD, SWC620WF, SWC620BF, SWC620CH1, SWC620CH2, SWC620DH2 | Shaft body: 35CrNiMoV alloy steel (forging + quenched and tempered); Cross bearing: GCr15 bearing steel (ultra-precision grinding + high-temperature carburizing); Universal joint fork: 35CrNiMoV alloy steel (integral forging); Surface: High-temperature anti-corrosion coating; Tensile strength ≥ 2400 MPa; Rated torque range: 2800-4200 kN·m | 1. High-temperature oxidation and corrosion in continuous rolling mill high-temperature environments (＞150℃); 2. Shaft fracture due to extreme impact loads during steel rolling emergencies | 1. Install high-temperature resistant heat shields; 2. Equip with real-time torque monitoring and emergency shutdown systems to avoid overload |
Procurement & Technical Reference Standards
All SWC series large and extra-large universal shafts in this catalog strictly comply with international standards (ISO 6336-2:2019, ISO 14644-1, API Spec 7K) and national standards (GB/T 12467.1-2019 Class AA Precision). Procurement reference guidelines: 1. Confirm key parameters (rated torque, operating temperature, angular deflection, working environment) and matching equipment model to select the corresponding SWC series and model; 2. Prioritize batch procurement of critical wearing parts (cross bearings, high-temperature seal rings, high-precision filters) to meet emergency maintenance needs of key equipment; 3. Verify the supplier's qualification (ISO 9001:2015 certification, heavy-duty shaft forging production authorization, non-destructive testing qualification) to ensure product quality traceability and professional technical support.
Technical maintenance reference standards: 1. Establish a graded maintenance system: Daily inspect vibration, temperature, and oil leakage of the universal shaft (normal operating temperature ≤ 120℃); Weekly check connection tightness and lubrication status; Monthly clean the lubrication filter and measure shaft runout (radial runout ≤ 0.08 mm); Semi-annually conduct non-destructive testing (magnetic particle inspection, ultrasonic flaw detection) of key components; Annually conduct comprehensive disassembly and inspection; 2. Use only original or authorized compatible parts and lubricants that meet specification requirements (avoid mixing different types of lubricants); 3. Maintain detailed maintenance records, including installation parameters, maintenance time, working hours, and replacement parts, to realize full-life cycle management and predict potential failures in advance.
Call to Action
SWC series large and extra-large universal shafts are the core guarantee for the stable operation of ultra-heavy-duty industrial equipment. Our catalog covers the full range of SWC200 to SWC620 size series with complete models, all manufactured through strict forging, precision machining, and quality inspection processes to ensure original quality and reliable performance. With a professional technical team specializing in heavy-duty power transmission systems, we provide one-stop services such as personalized model selection consultation, on-site installation and commissioning guidance, fault diagnosis and solution formulation, and customized product development. Whether you need emergency replacement parts to minimize production downtime, long-term spare parts supply agreements, or technical support for universal shaft maintenance and optimization, our team is ready to assist. Contact us today to discuss your specific needs and obtain personalized procurement plans that improve equipment reliability and reduce overall maintenance costs.
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