Core Application & Target User Demand
This catalog focuses on SWC series universal shafts (cardan shafts), which are core power transmission components widely compatible with heavy-duty industrial equipment such as rolling mills, metallurgical machinery, mining conveyors, port cranes, and large-scale reducers. Tailored for plant maintenance engineers, industrial equipment integrators, and heavy machinery manufacturers, it addresses pain points like shaft joint wear, torque transmission failure, and short service life caused by harsh working conditions (high load, high vibration, extreme temperature). The core value lies in providing high-torque, high-precision, and wear-resistant universal shafts that ensure stable power transmission, adapt to angular misalignment between transmission shafts, and extend the overall service life of equipment. All products comply with GB/T 12467.1-2019 (Universal Joint Shafts for Mechanical Transmission) and ISO 6336 (Gear and Shaft Transmission Performance Standards).
1. SWC Small-Size Universal Shaft Series (SWC42, SWC58, SWC65)
Small-size SWC universal shafts are designed for light to medium load power transmission scenarios, such as small conveyors, mini rolling mills, and auxiliary industrial equipment. They feature compact structure, light weight, and flexible angular adjustment, effectively solving the problem of unstable transmission caused by small-space shaft misalignment. A field case: A small mining conveyor's SWC42 universal shaft failed due to insufficient lubrication, leading to cross bearing seizure. After replacing the shaft and implementing regular lubrication maintenance, the conveyor resumed stable operation. All products in this series meet the torque requirements of light-duty equipment and comply with GB/T 12467.1-2019 Class B precision standards.
Serial No. | Product Models | Material | Main Wear Reasons | Damage Prevention Notes |
1 | SWC42, SWC42BH, SWC42A, SWC42B, SWC-I-42, SWC42WH, SWC42WD | Shaft body: 45# carbon steel (quenched and tempered); Cross bearing: GCr15 bearing steel; Universal joint fork: Alloy steel 40Cr; Surface: Phosphating treatment; Tensile strength ≥ 980 MPa | 1. Cross bearing wear caused by insufficient lubrication and dust intrusion; 2. Shaft fork fatigue deformation due to overload operation beyond rated torque | 1. Inject lithium-based grease (NLGI 2) every 500 working hours; 2. Install dust covers at both ends and ensure the operating load does not exceed 85% of the rated torque |
2 | SWC58, SWC58BH, SWC58A, SWC58B, SWC-I-58, SWC58WH, SWC58WD | Shaft body: 40Cr alloy steel (quenched and tempered); Cross bearing: GCr15SiMn bearing steel; Universal joint fork: 42CrMo alloy steel; Surface: Anti-corrosion galvanizing; Tensile strength ≥ 1080 MPa | 1. Cross shaft neck wear due to long-term high-frequency angular deflection; 2. Galvanized layer peeling caused by chemical corrosion in humid environments | 1. Control the maximum angular deflection within 15°; 2. Regularly inspect the surface galvanized layer and reapply anti-corrosion coating if peeling occurs |
3 | SWC65, SWC65BH, SWC65A, SWC65B, SWC-I-65, SWC65WH, SWC65WD, SWC-I65A, SWCI65A | Shaft body: 42CrMo alloy steel (quenched and tempered); Cross bearing: GCr15 bearing steel (carburizing and quenching); Universal joint fork: 42CrMo alloy steel; Surface: Shot blasting + anti-rust paint; Hardness HRC 35-40 | 1. Bearing cage damage caused by foreign particles entering the bearing; 2. Shaft body fatigue cracking due to unstable load transmission | 1. Install a 20 μm filter in the lubrication system; 2. Monitor load fluctuation in real time and avoid sudden impact loads |
2. SWC Medium-Size Universal Shaft Series (SWC75, SWC90, SWC100)
Medium-size SWC universal shafts are suitable for medium to heavy load transmission scenarios, including medium rolling mills, mining crushers, and port hoist equipment. They have high torque-bearing capacity and strong impact resistance, effectively solving the problem of transmission failure caused by large torque fluctuations. All products comply with GB/T 12467.1-2019 Class A precision standards and ISO 6336-2:2019 torque rating requirements. A typical application: Widely used in 2000t/d cement production line conveyors, ensuring stable power transmission under continuous high-load operation.
Serial No. | Product Models | Material | Main Wear Reasons | Damage Prevention Notes |
1 | SWC75, SWC75BH, SWC75A, SWC75B, SWC-I-75, SWC75WH, SWC75WD, SWC-I75, SWCI75 | Shaft body: 42CrMo alloy steel (quenched and tempered); Cross bearing: GCr15SiMn bearing steel; Universal joint fork: 42CrMo alloy steel (forging); Surface: Nitriding treatment; Wear resistance ≥ 15000 working hours | 1. Nitriding layer wear at the shaft neck due to long-term friction with the bearing; 2. Universal joint fork cracking due to improper installation alignment | 1. Check the shaft neck wear every 1000 working hours (allowable wear ≤ 0.1 mm); 2. Ensure the installation coaxiality error ≤ 0.05 mm |
2 | SWC90, SWC90A, SWC90B, SWC-I-90, SWC90WH, SWC90WD, SWC-I90A, SWC-I90B, SWC-I90C, SWC-I90D, SWC-I90E | Shaft body: 42CrMoV alloy steel (quenched and tempered); Cross bearing: GCr15 bearing steel (carburizing and quenching); Universal joint fork: 42CrMoV alloy steel; Surface: Anti-corrosion paint + shot blasting; Tensile strength ≥ 1200 MPa | 1. Cross bearing rolling element fatigue damage under long-term alternating load; 2. Shaft body corrosion caused by water ingress in outdoor working environments | 1. Conduct magnetic particle inspection of the cross bearing every 6 months; 2. Install waterproof seals and regularly check for water ingress |
3 | SWC100, SWC100A, SWC100B, SWC-I-100, SWC100WH, SWC100WD, SWC100BF, SWC100WF, SWC-I100A, SWC-I100B, SWC-I100C, SWC-I100D, SWC-I100E | Shaft body: 42CrMo alloy steel (forging + quenched and tempered); Cross bearing: GCr15SiMn bearing steel; Universal joint fork: 42CrMo alloy steel (forging); Surface: Phosphating + anti-rust oil; Hardness HRC 38-42 | 1. Spline wear caused by relative sliding between the shaft and sleeve under high torque; 2. Bearing failure due to lubricating oil degradation | 1. Apply molybdenum disulfide lubricant to the spline surface; 2. Replace lubricating oil every 2000 working hours (NAS 8 class or higher) |
3. SWC Large-Size Universal Shaft Series (SWC120, SWC150, SWC160)
Large-size SWC universal shafts are engineered for heavy-duty and ultra-heavy-duty power transmission, such as large rolling mills, marine propellers, and large mining excavators. They feature high torque capacity, excellent fatigue resistance, and stable performance under extreme conditions, solving the problem of high-risk transmission failures in key heavy-duty equipment. All products comply with GB/T 12467.1-2019 Class AA precision standards and API Spec 7K (for mining equipment) requirements. A field maintenance case: A large steel mill's SWC120 universal shaft had a cross shaft fracture due to overload. After replacing with the original model and optimizing the load control system, the equipment operated stably for over 2 years.
Serial No. | Product Models | Material | Main Wear Reasons | Damage Prevention Notes |
1 | SWC120, SWC120A, SWC120B, SWC-I-120, SWC120WH, SWC120WD, SWC120BF, SWC120WF, SWC120CH, SWC120DH, SWC-I120A, SWC-I120B, SWC-I120C, SWC-I120D, SWC-I120E, SWC-I120F | Shaft body: 42CrMoV alloy steel (forging + quenched and tempered); Cross bearing: GCr15SiMn bearing steel (carburizing and quenching); Universal joint fork: 42CrMoV alloy steel (integral forging); Surface: Nitriding treatment; Hardness HRC 55-60 (nitrided layer) | 1. Nitrided layer peeling due to improper disassembly and assembly scratches; 2. Cross shaft fatigue fracture under long-term ultra-high load | 1. Use soft metal tools during disassembly and assembly to avoid scratches; 2. Strictly operate within the rated load range and install overload protection devices |
2 | SWC150, SWC150A, SWC150B, SWC-I-150, SWC150WH, SWC150WD, SWC150BF, SWC150WF, SWC150CH, SWC150DH, SWC-I150A, SWC-I150B, SWC-I150C, SWC-I150D, SWC-I150E, SWC-I150F | Shaft body: 35CrMo alloy steel (forging + quenched and tempered); Cross bearing: GCr15 bearing steel (ultra-precision machining); Universal joint fork: 35CrMo alloy steel (integral forging); Surface: Anti-corrosion paint + ceramic coating; Tensile strength ≥ 1300 MPa | 1. Ceramic coating wear caused by long-term vibration; 2. Bearing damage due to foreign metal particles entering the lubrication system | 1. Install vibration dampers near the universal shaft; 2. Use a 10 μm high-precision filter in the lubrication circuit and clean it monthly |
3 | SWC160, SWC160BH, SWC160WH, SWC160CH, SWC160DH, SWC160DH1, SWC160CH1, SWC160CH2, SWC160WD, SWC160WF, SWC160BF | Shaft body: 42CrMo alloy steel (forging + quenched and tempered); Cross bearing: GCr15SiMn bearing steel (carburizing and quenching); Universal joint fork: 42CrMo alloy steel (forging); Surface: Phosphating + anti-corrosion wax; Wear resistance ≥ 20000 working hours | 1. Spline connection loosening due to long-term high-frequency vibration; 2. Lubrication failure caused by seal ring aging | 1. Check the spline connection tightness every 500 working hours and apply thread locking adhesive; 2. Replace the seal ring every 3 months |
4. SWC Extra-Large-Size Universal Shaft Series (SWC165, SWC180)
Extra-large-size SWC universal shafts are designed for ultra-heavy-duty transmission scenarios, including large-scale metallurgical rolling mills, offshore wind turbines, and super-large mining equipment. They have the highest torque-bearing capacity and strongest environmental adaptability, ensuring reliable power transmission in extreme working conditions (high temperature, high humidity, strong corrosion). All products comply with international standards ISO 14644-1 and national standards GB/T 12467.1-2019, with strict quality control throughout the production process.
Serial No. | Product Models | Material | Main Wear Reasons | Damage Prevention Notes |
1 | SWC165, SWC165BH, SWC165WH, SWC165CH, SWC165DH, SWC165DH1, SWC165CH1, SWC165CH2, SWC165WD, SWC165WF, SWC165BF | Shaft body: 42CrMoV alloy steel (forging + quenched and tempered); Cross bearing: GCr15SiMn bearing steel (carburizing and quenching); Universal joint fork: 42CrMoV alloy steel (integral forging); Surface: Nitriding + anti-corrosion coating; Hardness HRC 58-62 (nitrided layer) | 1. Cross bearing overheating and damage due to poor heat dissipation in high-temperature environments; 2. Shaft body corrosion caused by chemical media in metallurgical environments | 1. Install forced cooling devices for the bearing in high-temperature environments; 2. Use acid and alkali resistant anti-corrosion coatings and inspect monthly |
2 | SWC180, SWC180BH, SWC180WH, SWC180CH, SWC180DH, SWC180DH1, SWC180CH1, SWC180CH2, SWC180WD, SWC180WF, SWC180BF, SWC-I180A, SWC-I180 | Shaft body: 35CrNiMo alloy steel (forging + quenched and tempered); Cross bearing: GCr15 bearing steel (ultra-precision machining + carburizing and quenching); Universal joint fork: 35CrNiMo alloy steel (integral forging); Surface: Ceramic coating + anti-rust oil; Tensile strength ≥ 1400 MPa | 1. Universal joint fork fatigue damage under long-term alternating load and impact; 2. Bearing failure due to lubricating oil contamination | 1. Conduct ultrasonic flaw detection of the universal joint fork every 6 months; 2. Regularly test the lubricating oil cleanliness and replace it if it exceeds NAS 7 class |
Procurement & Technical Reference Standards
All SWC series universal shafts in this catalog strictly comply with international standards (ISO 6336, ISO 14644-1) and national standards (GB/T 12467.1-2019). For mining and petroleum equipment applications, they also meet API Spec 7K requirements. Procurement reference guidelines: 1. Confirm the specific application scenario (load level, working environment, angular deflection requirements) and equipment model to select the corresponding SWC series and model; 2. Prioritize batch procurement of easily worn parts (cross bearings, seal rings, lubricating oil) to meet emergency maintenance needs; 3. Verify the supplier's qualification (ISO 9001 quality management system certification, heavy-duty shaft production authorization) to ensure product authenticity, quality traceability, and technical after-sales support.
Technical maintenance reference standards: 1. Establish a graded maintenance schedule: Daily inspect the universal shaft for vibration, temperature, and oil leakage; Weekly check the tightness of connections and lubrication status; Monthly measure shaft runout (radial runout ≤ 0.05 mm) and spline wear; Semi-annually conduct non-destructive testing (magnetic particle inspection, ultrasonic flaw detection) of key components; 2. Use only original or authorized compatible parts and lubricants that meet specification requirements (lithium-based grease NLGI 2, NAS 8 class or higher lubricating oil); 3. Maintain detailed maintenance records, including installation parameters, maintenance time, working hours, and replacement parts, to achieve full-life cycle management of the universal shaft.
Call to Action
SWC series universal shafts are the core guarantee for stable power transmission of heavy-duty industrial equipment. Our catalog covers the full range of SWC small, medium, large, and extra-large size series, with complete models, original quality, and strict compliance with international and national standards. With a professional technical team experienced in heavy-duty transmission systems, we provide one-stop services such as model selection consultation, on-site installation guidance, fault diagnosis, and customized solutions. Whether you need emergency replacement parts to resolve transmission failures, long-term spare parts supply agreements, or technical support for universal shaft maintenance, our team is ready to assist. Contact us today to discuss your specific needs and obtain personalized procurement plans that reduce maintenance costs and improve equipment operation efficiency.
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