SWC350BH Heavy-Duty Cardan Shaft – 10-Bolt Flange, 180 kN·m, Integral Fork Head for Heavy Industry

Factory Direct | 42CrMo Alloy Steel | Integral Forged Fork Head | 180 kN·m Nominal Torque | 15-25° Axis Angle | Telescopic Welding Type | 10-Bolt Flange Connection | Painting Finish | OEM Customizable

The Apexcoupling SWC350BH is a high-capacity standard telescopic welding type cardan shaft engineered for the most demanding heavy industrial power transmission applications. Featuring a robust integral forged fork head without bolt connections, this coupling delivers superior structural strength, reliability, and extended service life. With 15-25° angle compensation capability, high transmission efficiency (98-99.8%), and premium alloy steel construction (42CrMo / 20Cr quenched), the SWC350BH is the definitive solution for steel rolling mills, crushers, heavy mining equipment, ship propulsion systems, and crane main drives.

The 10-bolt flange connection provides secure and reliable mounting for extreme heavy-duty applications. The SWC series features an integral fork structure where bearings are fixed without bolts, avoiding loose bolt breakage and simplifying maintenance. The integral fork head bolt-free connection structure significantly improves structural strength and reliability.

✅ Integral forged fork head – eliminates bolt loosening and breakage. 15-25° axis angle compensation – significantly greater than SWP types (~10°). 180 kN·m torque capacity – handles the heaviest loads. 98-99.8% transmission efficiency – energy-saving operation. 10-bolt flange connection – secure and reliable mounting. JB/T5513-1991 standard – quality assured. Integral yokes are forged as a single piece, offering higher structural rigidity and resistance to torque.

Key Technical Specifications (JB/T5513-1991 / JB/T5513-2006)

📐 Custom lengths and telescopic strokes available. Contact our engineering team for custom sizing.

Product Structure & Components

1. Integral Forged Fork Head – One-piece construction without bolt connections – eliminates the most common failure point in traditional universal joints. The SWC series uses an integral fork structure where bearings are fixed without bolts, avoiding loose bolt breakage and simplifying maintenance. Integral yokes are forged as a single piece, offering higher structural rigidity and resistance to torque.

2. Cross Shaft Assembly (Spider) – Precision cross shaft with multi-row needle roller bearings for high wear resistance and strength. Equipped with grease fittings for easy lubrication.

3. Telescopic Welded Shaft – Standard telescopic design with 150mm stroke compensates for axial displacement.

4. 10-Bolt Flange Connection – 310mm outer diameter flange with 10 holes evenly distributed at 23mm diameter for secure mounting.

5. Alloy Steel Construction – 42CrMo / 20Cr with quenching process – high strength and durability. Raw blanks are refined via quenching and tempering, while spline shafts undergo intensive induction hardening.

💡 How it works: The SWC350BH cardan shaft uses an integral fork head design that eliminates the weak link of bolt compression bearing seats, completely avoiding common malignant damage caused by bolt loosening or breaking. Torque is transmitted through the cross shaft, while the telescopic shaft accommodates axial displacement. The 10-bolt flange connection provides secure mounting to driven equipment. The integral fork design provides significantly longer service life than bolt-connected designs. The SWC type offers greater angle compensation capability (15-25°) compared to SWP type (~10°). The SWC350BH also features a double structure design, effectively addressing shaft misalignment and axial displacement.

SWC350BH vs Other SWC Types – Quick Comparison

💡 BH (Standard Telescopic Welding) is the most commonly used type in the SWC series, offering the best balance of performance, reliability, and versatility for general industrial applications.

Key Features & Advantages

Applications

The SWC350BH cardan shaft is widely used across heavy industrial sectors:

• Steel Rolling Mills – Main drive and auxiliary transmissions, hot rolling and cold rolling applications

• Crushers – Heavy-duty crusher drives, 2000HP+ crusher applications

• Mining Equipment – Heavy-duty conveyors, feeders, mineral processing equipment

• Metallurgical Equipment – Continuous casting lines, straighteners

• Paper Machinery – Heavy-duty paper production lines

• Ship Propulsion Systems – Marine main and auxiliary drives

• Crane Main Drives – Heavy-duty lifting and material handling

• Construction Machinery – Large-scale heavy equipment drives

• Petroleum Equipment – Oil and gas machinery

• Punch Presses & Straighteners – Heavy metal forming equipment

• Cement & Chemical Industries – Heavy-duty processing equipment

💡 SWC type cross shaft universal couplings are widely used in rolling mill main drive and auxiliary transmission, as well as in metallurgy, lifting, engineering transportation, mining, petroleum, shipbuilding, coal, rubber, papermaking machinery, and other heavy machinery industries.

Why Choose Apex Coupling for SWC350BH Cardan Shafts?

Customization Options

FAQ

Q: What is an SWC350BH cardan shaft?
A: The SWC350BH is a standard telescopic welding type universal joint drive shaft with an integral fork head design. It transmits torque between shafts that are not collinear, with angle compensation up to 25°. SWC type has larger angle compensation capability, with axis angle up to 15-25°.

Q: What is the advantage of the integral fork head design?
A: The integral fork head eliminates bolt connections, which are a common failure point in traditional universal joints. This significantly improves structural strength, reliability, and service life. Integral yokes are forged as a single piece, offering higher structural rigidity and resistance to torque. SWC type has larger angle compensation capability (15-25°) compared to SWP type (~10°).

Q: What is the maximum operating angle?
A: The SWC350BH offers 15-25° axis angle compensation – significantly larger than the SWP type (~10°).

Q: What is the transmission efficiency?
A: The transmission efficiency reaches 98-99.8% – providing significant energy savings for high-power transmission applications.

Q: What materials are used?
A: The coupling is manufactured from 42CrMo or 20Cr alloy steel with a quenching process for high strength and durability.

Q: What is the torque and speed range?
A: Nominal torque is 180 kN·m (approx. 180,000 N·m). Maximum speed is up to 4000 RPM. Speeds above 1000 RPM require dynamic balancing.

Q: What is the telescopic stroke?
A: The standard telescopic stroke is 150mm.

Q: What are the flange specifications?
A: Flange outer diameter: 310mm (js11), spigot diameter: 210mm (H7), 10×23mm bolt holes.

Q: What industries is this coupling suitable for?
A: Steel rolling mills, crushers, mining, conveyors, paper machinery, ship propulsion, cranes, construction machinery, petroleum equipment, cement, chemical, and general heavy industrial applications.

Q: Does the coupling require balancing?
A: For high-speed applications (above normal operating speeds), dynamic balancing up to G6.3 grade is recommended. Please specify when ordering.

Q: Can I get a custom coupling?
A: Yes. We offer OEM/ODM/OBM customization – custom lengths, telescopic strokes, flange interfaces, materials, and finishes.

Q: What is the warranty?
A: 1 Year – quality assured.

Request a Quote

Send us your required specifications (length, flange interface, telescopic stroke), quantity, and any customization requirements. Our engineers will provide a quotation within 24 hours.