Star Yoke for PTO Shaft – Multi-Point Torque Transfer for Heavy Equipment
Star-profile yoke | Series 6ST–50ST | 30.2–50 mm bore | forged alloy steel
The Ever-power Star Yoke delivers high-capacity torque through its star-shaped bore geometry, distributing loads across multiple contact lobes. This design is favoured for high-torque implements including balers, combine harvesters, large slashers, and industrial mixing equipment. Each yoke is forged, normalised, CNC-machined, and induction-hardened for dimensional precision and long fatigue life.
🔧 Technical Specifications
| Series | A (mm) | B (mm) | C (mm) | D (mm) |
|---|---|---|---|---|
| 6.06ST | 30.2 | 92 | 104 | 56.8 |
| 6.07ST | 30.2 | 92 | 104 | 47.4 |
| 7.06ST | 30.2 | 106.5 | 117 | 56.8 |
| 7.07ST | 30.2 | 106.5 | 117 | 47.4 |
| 8.06ST | 35 | 106.5 | 121 | 56.8 |
| … Additional series available — contact us for the complete specification sheet … | ||||
| 10.07ST | 41 | 118 | 125 | 56.8 |
| 42.06ST | 42 | 104.5 | 130 | 67.5 |
| 42.07ST | 42 | 104.5 | 130 | 56.8 |
| 50.06ST | 50 | 118 | 133 | 67.5 |
| 50.07ST | 50 | 118 | 133 | 56.8 |
⭐ Key Features & Benefits
⭐
Multi-Lobe Star Geometry
Distributes torque across multiple lobes, reducing peak stress by up to 30%.
💪
Heavy-Duty Forging
Forged from 42CrMo4 steel and normalised for uniform microstructure.
🔧
Large Bore Range
Bore sizes from 30.2 mm to 50 mm cover medium-duty to industrial-grade drivelines.
🛠️
Drop-In Replacement
Dimensionally interchangeable with major European brands.
⚡
Vibration Dampening
Star profile absorbs torsional vibration spikes during implement engagement.
🔄 Compatibility Information
Fits all star-profile PTO tubes compliant with European standard dimensions. Compatible with Walterscheid W-series, Bondioli & Pavesi, and Comer Industries drivelines. Suitable for round balers, square balers, combine headers, large rotary cutters, wood chippers, and industrial mixers.
📚 Selection Guide
Step 1: Identify the star tube outer diameter and lobe count.
Step 2: Measure dimension A and B to select the series.
Step 3: ST suffix confirms star profile; .06ST is long, .07ST is compact.
Step 4: Verify cross kit cup diameter matches your universal joint.
🌾 Typical Application Scenarios
🌾 Round & Square Balers
Handles high-torque, shock-loaded baling operations.
🌳 Wood Chippers & Shredders
Powers industrial chippers where instant torque spikes are common.
💾 Large Rotary Mowers
Drives wide-deck commercial mowers for roadside maintenance.
🏭 Industrial Mixing Equipment
Continuous heavy-duty operation in feed mills and chemical plants.
🛠️ Installation & Usage Guide
Verify the star tube profile matches the yoke bore.
Clean both the tube and yoke bore thoroughly.
Apply molybdenum disulfide grease to the tube exterior.
Press the yoke onto the tube, rotating slightly to engage all lobes.
Install the cross kit, torque bearing strap bolts to specification.
Grease all fittings and perform a static alignment check.
❓ Frequently Asked Questions
▶ What makes a star yoke different?
▶ Can star yokes handle higher torque?
▶ What is the largest bore?
▶ Compatible with Walterscheid W-series?
▶ Custom bore available?
▶ Lead time?
⭐ Customer Reviews
★★★★★
Running Series 8ST star yokes on our New Holland baler in Queensland — no failures in 800+ bales.
Bruce T. — 🇦🇺 Australia
★★★★★
Benchmarked against Walterscheid originals — no measurable difference in hardness or dimensions.
Stefan K. — 🇩🇪 Germany
★★★★☆
Very good yoke for the price. 200 pieces for our assembly line — consistent quality.
Jean-Marc D. — 🇫🇷 France
★★★★★
Perfect fit on Vermeer baler. Saved about 40% versus OEM pricing.
Mike O. — 🇺🇸 United States
★★★★★
Tested dimensional accuracy on CMM — within ±0.03 mm. Impressive.
Takeshi N. — 🇯🇵 Japan
📈 Our Product vs. Low-Quality Alternatives
| Feature | Ever-power Yoke | Low-Quality Alternative |
|---|---|---|
| Material | ✔ Forged alloy steel (C45/42CrMo) | ✘ Cast iron or mild steel |
| Heat Treatment | ✔ Induction-hardened 55–62 HRC | ✘ No heat treatment |
| Tolerances | ✔ CNC machined ±0.05 mm | ✘ ±0.5 mm rough finish |
| Surface Coating | ✔ Zinc plated / phosphate coated | ✘ Uncoated, rusts quickly |
| Quality System | ✔ ISO 9001:2015 certified | ✘ No quality certification |
| Warranty | ✔ 12-month quality guarantee | ✘ No warranty offered |
🔗 Related Products & Accessories
Star Profile Tubes
Matched star tubes for complete driveline assembly
Cross & Bearing Kits
Heavy-duty U-joint kits for baler-class torque
PTO Safety Shields
Wide-body guards for large-diameter drivelines
Friction Torque Limiters
Adjustable slip clutches for overload protection
Complete PTO Shafts
Pre-assembled star-profile drivelines
🏆 Certifications & Standards
🏆
ISO 9001:2015
Quality management system certified by accredited body
🛡️
Material Test Reports
EN 10204 3.1 mill certificates for every steel batch
✅
CE Compliance
Meets European machinery safety directives
🔎
100% Inspection
Every yoke dimensionally verified before shipment
🏭 Why Choose Ever-power?
We are Ever-power, and our speciality is heavy-duty PTO driveline components. With 20+ years of manufacturing experience and a modern 30,000 m² facility, we produce everything from small Series 1 yokes to massive Series 50 components for industrial applications. Our processes are vertically integrated and ISO 9001:2015 certified. We proudly serve OEM partners and distributors in 50+ countries.
📞 Ready to Order? Let’s Talk!
Whether you need a single replacement yoke or a container-load OEM order, our team is here to assist. Contact us for competitive pricing, rapid delivery, and expert technical support.
or visit australia-drive.com to explore our full catalogue
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