SWC120BH Standard Telescopic Welding Cardan Shaft – Integral Fork Head, 6 kN·m, 8-Bolt Flange for Heavy Industrial Machinery

Factory Direct | 42CrMo / 40Cr Alloy Steel | Integral Fork Head Design | 6 kN·m Nominal Torque | 0-4000 RPM | 15-25° Axis Angle | Telescopic Welding Type | 8-Bolt Flange Connection | Painting Finish | OEM Customizable

The Apexcoupling SWC120BH is a standard telescopic welding type cardan shaft (universal joint drive shaft) designed for reliable power transmission in heavy industrial applications. Featuring an 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 robust alloy steel construction (42CrMo / 40Cr), the SWC120BH is the ideal solution for steel rolling mills, mining equipment, conveyors, paper machinery, crushers, ship drives, and general industrial drives.

✅ Integral forged fork head – no bolt connections, eliminates bolt loosening and breakage. 15-25° axis angle compensation – accommodates significant misalignment. 98-99.8% transmission efficiency – energy-saving operation. 8-bolt flange connection – secure and reliable mounting. Compact & reliable – stable transmission, easy assembly and disassembly. JB/T5513-1991 / JB/T5513-2006 compliant.

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 bolt loosening and breakage, the most common failure point in traditional universal joints.

2. Cross Shaft Assembly (Spider) – Precision cross shaft with multi-row needle roller bearings for high wear resistance and strength. Equipped with grease fittings (注油嘴) for easy lubrication. Cross shaft dimensions: 45×120mm.

3. Telescopic Welded Shaft – Standard telescopic design with 80mm stroke compensates for axial displacement.

4. Flange Connection – 102mm outer diameter flange with 8 holes evenly distributed at 11mm diameter for secure mounting.

5. Alloy Steel Construction – 42CrMo or 40Cr with quenching process – high strength and durability.

💡 How it works: The SWC120BH 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 8-bolt flange connection provides secure mounting to driven equipment.

SWC120BH 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

• Steel Rolling Mills – Main drive and auxiliary transmissions

• Mining Equipment – Conveyors, crushers, feeders

• Conveyor Systems – Material handling and transport

• Paper Machinery – Paper production and finishing

• Ship Drives – Marine propulsion auxiliary systems

• Crushers & Straighteners – Heavy machinery drives

• Construction Machinery – Heavy equipment drives

• Agricultural Machinery – Farm equipment and harvesters

• Energy & Mining Systems – Power transmission in demanding environments

• Metallurgical Equipment – Continuous casting lines

Why Choose Apex Coupling for SWC120BH Cardan Shafts?

Customization Options

FAQ

Q: What is an SWC120BH cardan shaft?
A: The SWC120BH 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°.

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.

Q: What is the maximum operating angle?
A: The SWC120BH 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 40Cr alloy steel with a quenching process for high strength and durability.

Q: What is the torque and speed range?
A: Nominal torque is 6 kN·m (approx. 6000 N·m), with allowable torque range from 1.25 to 1000 N·m. Maximum speed is up to 4000 RPM.

Q: What is the telescopic stroke?
A: The standard telescopic stroke is 80mm.

Q: What are the flange specifications?
A: Flange outer diameter: 102mm, spigot diameter: 75mm (H7), 8×M11 bolt holes.

Q: What industries is this coupling suitable for?
A: Steel rolling mills, mining, conveyors, paper machinery, ship drives, crushers, construction machinery, agricultural equipment, and general industrial applications.

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

Q: Can I get a custom coupling?
A: Yes. We offer OEM 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.