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SWC120 Forged Integral Flange Yoke – Cross Shaft 45×101mm, 40Cr Quenched & Tempered HB250-300
Model Number
Check below, custom
SWC120
- Phone : +86 13431039760
- Wechat : +86 13431039760
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- Email : ella@apexcoupling.com
Product Description
SWC120 Forged Integral Flange Yoke – 40Cr Quenched & Tempered, Cross Shaft 45×101mm for SWC Cardan Shafts
Factory Direct | 40Cr Alloy Steel | Forged Integral Construction | Quenched & Tempered HB250-300 | SWC120 Standard | Cross Shaft 45×101mm | 8×M11 Bolt Holes | Ample Stock | OEM Customization
The Apexcoupling SWC120 Forged Integral Flange Yoke is a high-strength replacement component designed for SWC series cardan shafts and universal joint drive systems. Manufactured from premium 40Cr alloy steel using a one-piece forged integral construction, this flange yoke delivers superior strength, durability, and fatigue resistance compared to welded or multi-piece alternatives. The quenched and tempered heat treatment achieves a hardness of HB250-300, providing an optimal balance of strength and toughness for heavy-duty industrial applications.
Precision-machined to SWC120 specifications with a cross shaft bearing hole of 45×101mm, a flange diameter of Φ120mm, and 8×M11 mounting holes on a 102mm bolt circle, this flange yoke is a direct fit for SWC120 series universal joints. With ample stock availability and full customization support, the SWC120 flange yoke is the ideal replacement part for mining equipment, metallurgical machinery, rolling mills, conveyors, and heavy industrial drive systems.
✅ Forged integral construction – eliminates bolt connection weak points for superior reliability. 40Cr alloy steel – quenched & tempered HB250-300 for optimal strength and toughness. SWC120 standard dimensions – cross shaft 45×101mm, flange Ø120mm, 8×M11 holes. Precision-machined bearing holes – ensures accurate bearing fit and long service life. Ample stock – ready for immediate shipment. OEM customization – custom sizes, materials, and keyways available.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Name | SWC120 Forged Integral Flange Yoke (Fork Head) |
| Model | SWC120 |
| Material | 40Cr alloy steel – high-strength, excellent toughness |
| Construction | One-piece forged integral – no welded or bolted joints |
| Heat Treatment | Quenched & tempered – HB250-300 hardness |
| Cross Shaft Bearing Hole | 45 × 101 mm |
| Center Height | 70 mm |
| Flange Diameter (D) | Φ120 mm |
| Bolt Hole Count | 8 |
| Bolt Hole Diameter | Φ11 mm (M11 bolt) |
| Bolt Circle Diameter (PCD) | 102 mm |
| Recess Diameter | 75 mm |
| Surface Treatment | Black oxide / anti-rust coating (standard) |
| Standard | SWC series (JB/T 5513) |
| Customization | OEM – custom sizes, materials, keyways, and finishes |
| Stock Availability | Ample – ready for immediate shipment |
| Lead Time | 7-15 days for custom orders |
| Place of Origin | Guangdong, China |
SWC120 Flange Yoke – Detailed Dimensions
| Dimension | Value |
|---|---|
| Flange Outer Diameter (D) | 120 mm |
| Bolt Circle Diameter (PCD) | 102 mm |
| Number of Bolt Holes | 8 |
| Bolt Hole Diameter | 11 mm |
| Bolt Specification | M11 |
| Cross Shaft Diameter (φM) | 45 mm |
| Cross Shaft Length (H) | 101 mm |
| Center Height | 70 mm |
| Recess Diameter | 75 mm |
| Material Hardness | HB250-300 (40Cr, quenched & tempered) |
📐 All dimensions are in millimeters (mm). Custom dimensions and specifications available upon request.
Product Structure
Integral Forged Fork Head – One-piece forged construction without bolt connections – eliminates the weak point found in welded or bolted designs, dramatically improving reliability and service life.
Cross Shaft Bearing Bores – Precision-machined bearing holes (45×101mm) for accurate cross shaft fit and extended bearing life.
Flange Mounting Surface – Precision-ground flange face with 8×M11 bolt holes on 102mm PCD for secure flange connection.
40Cr Alloy Steel – High-strength material with quenched & tempered heat treatment (HB250-300) for superior wear resistance and fatigue strength.
💡 How it works: The SWC120 flange yoke serves as the critical connection point between the cardan shaft cross shaft and the driven equipment flange. The integral forged design transfers torque from the cross shaft through the fork arms to the flange mounting face. The 40Cr material with quenched & tempered heat treatment provides the strength to withstand heavy shock loads, while the precision-machined bearing bores ensure smooth rotation and long service life. The 8×M11 bolt pattern securely mounts the yoke to mating flanges in mining, metallurgical, and heavy industrial drive systems.
Forged Integral vs Welded/Bolted – Why Choose Forged?
| Feature | Forged Integral (SWC120) | Welded / Bolted Design |
|---|---|---|
| Construction | One-piece forged – no joints | Multi-piece – welded or bolted |
| Bolt failure risk | None – eliminates bolt connections | High – bolts can loosen or break |
| Structural integrity | Superior – uniform grain structure | Moderate – stress at weld/joints |
| Fatigue resistance | Excellent – no stress concentration | Lower – weld/bolt stress risers |
| Service life | 30-50% longer than bolted designs | Standard |
| Maintenance | Minimal – no bolt inspection required | Frequent – bolt inspection and re-torquing |
| Reliability | High – no weak links | Moderate – bolt failure is common |
| Best for | Heavy-duty, high-torque, high-reliability applications | Standard applications |
✅ Choose forged integral (SWC120) for applications requiring maximum reliability, long service life, and minimal maintenance – ideal for mining, metallurgy, steel mills, and heavy industrial drives.
Material – 40Cr Alloy Steel
The SWC120 flange yoke is manufactured from 40Cr alloy steel with quenched & tempered heat treatment:
| Property | Specification |
|---|---|
| Material | 40Cr (GB/T 3077) – chromium alloy steel |
| Heat Treatment | Quenching + Tempering (调质) |
| Hardness | HB250-300 |
| Tensile Strength | ≥980 MPa |
| Yield Strength | ≥785 MPa |
| Elongation | ≥9% |
| Impact Toughness | Excellent low-temperature impact toughness |
| Wear Resistance | High – suitable for heavy-duty applications |
💡 40Cr offers superior strength and toughness compared to standard 45# steel, with excellent hardenability and fatigue resistance. The quenched & tempered treatment provides an optimal balance of hardness (HB250-300) and toughness for demanding industrial applications.
Applications
Mining Equipment – Conveyor drives, crushers, feeders
Metallurgical Machinery – Rolling mills, continuous casting lines
Steel Mills – Main drive and auxiliary transmissions
Heavy Industrial Drives – High-torque power transmission
Cranes & Hoists – Lifting and material handling equipment
Paper Machinery – Paper production equipment
Construction Equipment – Heavy machinery drives
Petroleum Equipment – Oil and gas machinery
Shipbuilding – Marine propulsion auxiliary systems
Aggregate Processing – Crushing and screening equipment
Why Choose Apex Coupling for SWC120 Flange Yokes?
| Advantage | Description |
|---|---|
| Factory Direct | Competitive B2B pricing – no middlemen |
| Premium 40Cr Steel | High-strength alloy – quenched & tempered HB250-300 |
| Forged Integral Construction | No bolt connections – eliminates weak points, extends service life |
| Precision Machining | Accurate bearing bores and flange dimensions – ensures proper fit |
| SWC120 Standard | Direct replacement – cross shaft 45×101mm, flange Ø120mm, 8×M11 holes |
| Ample Stock | Ready for immediate shipment |
| OEM Customization | Custom sizes, materials, keyways, and finishes available |
| ISO9001 Certified | Quality assured manufacturing |
FAQ
Q: What is a flange yoke (fork head)?
A: A flange yoke (also called a fork head or flange fork) is the critical component of a cardan shaft that connects the cross shaft to the driven equipment flange. It transmits torque from the universal joint through the flange mounting bolts.
Q: What is the advantage of forged integral construction?
A: Forged integral construction eliminates bolt connections, which are the most common failure point in traditional universal joints. This results in 30-50% longer service life and superior reliability.
Q: What material is used for the SWC120 flange yoke?
A: The SWC120 flange yoke is manufactured from 40Cr alloy steel with quenched & tempered heat treatment to HB250-300 hardness.
Q: What are the dimensions of the SWC120 flange yoke?
A: Cross shaft bearing: 45×101mm, center height: 70mm, flange diameter: Φ120mm, 8×Φ11mm bolt holes on 102mm PCD.
Q: Is this a direct replacement for SWC120 cardan shafts?
A: Yes. The SWC120 flange yoke is manufactured to SWC series standards and is a direct replacement for SWC120 cardan shaft flange yokes.
Q: Does the yoke require lubrication?
A: The yoke itself does not require lubrication, but the cross shaft bearings installed in the yoke bores do. Grease fittings are available on complete SWC120 assemblies.
Q: Can I get a custom flange yoke?
A: Yes. We offer OEM customization – custom sizes, materials (42CrMo, 35CrMo, etc.), keyways, and surface finishes.
Q: What is the lead time?
A: Stock items ship immediately. Custom orders typically require 7-15 days.
Q: What are the common applications?
A: Mining equipment, metallurgical machinery, rolling mills, steel mills, conveyors, cranes, paper machinery, and heavy industrial drives.
Q: What is the warranty?
A: 1 Year – quality assured.
Request a Quote
Send us your required specifications (SWC120 standard or custom), quantity, and any customization requirements. Our engineers will provide a quotation within 24 hours.
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