Star Yoke for PTO Shaft

The Star Yoke for PTO Shaft is a heavy-duty connection component featuring a precision-machined star-shaped (multi-lobed) bore profile designed for high-torque PTO drive lines. Covering Series 6ST through Series 50ST with bore diameters from 30.2 mm to 50 mm, this yoke is engineered for demanding applications such as large rotary cutters, heavy-duty feed mixers, wood chippers, and industrial pumps. The star profile distributes torque loads more evenly than simpler tube shapes, making it the preferred choice for equipment exceeding 100 HP.

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描述

Star Yoke for PTO Shaft — Heavy-Duty Star-Profile Connection for High-Torque Applications

Star Yoke for PTO Shaft

这 Star Yoke for PTO Shaft is engineered for the most demanding power take-off applications where superior torque capacity and load distribution are critical. The star-shaped multi-lobed bore profile interlocks with matching star tubes to create a high-contact-area joint that resists deformation under extreme torsional stress. This design is favored in heavy-duty Series 6 through Series 50 PTO shafts on high-horsepower tractors and industrial equipment. Each star yoke is drop-forged from premium alloy steel, CNC-machined, and induction-hardened at all critical surfaces.

🔧 技术规格

系列 A(mm) B(mm) C(mm) D（毫米）
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
8.07ST 35 106.5 121 47.4
7N.06ST 35 94 106 56.8
7N.07ST 35 94 106 47.4
32.06ST 32 76 98 56.8
32.07ST 32 76 98 47.4
36.06ST 36 89 106 56.8
36.07ST 36 89 106 47.4
9.06ST 41 108 130 67.5
9.07ST 41 108 130 56.8
10.06ST 41 118 125 67.5
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

规格

⭐ 主要特点和优势

⭐ Star-Profile Multi-Lobe Bore

Multi-lobed geometry maximizes contact area, distributing torque over a larger surface and reducing stress concentrations.

💪 Extreme Torque Capacity

Designed for 80-300+ HP applications across Series 6-50.

⚙ Precision CNC Machining

Star bore profile CNC-milled to ±0.02 mm, eliminating backlash and vibration.

🔥 Through-Hardened Construction

Full heat treatment HRC 58-62 for exceptional wear and fatigue resistance.

📐 Extended Size Range

Available up to Series 50 (50 mm bore, 118 mm tube OD) — the largest PTO shaft systems.

🛡 Industrial-Grade Finish

Heavy-duty zinc phosphate or electrophoretic finish for maximum corrosion protection.

🔄 兼容性信息

Compatible with star-profile PTO tubes from Series 6 through Series 50. Works with Walterscheid, Bondioli & Pavesi, Comer, AW Dynamik, Driveline Solutions. For high-HP tractors: John Deere, Case IH, New Holland, Fendt, CLAAS, Massey Ferguson, Valtra. Integrates with heavy-duty cross kits, wide-angle joints, and overrunning clutches.

📚 选择指南

Step 1 — Confirm Star Profile: Star tubes have a multi-lobed cross-section (typically 6 lobes). Verify yours is star, not triangular or lemon.

Step 2 — Measure Tube OD (B): Star tubes range from 76 mm (Series 32) to 118 mm (Series 50).

Step 3 — Select ST Variant: .06ST for wider/heavy-duty or .07ST for standard-width configurations.

选购指南

🌾 典型应用场景

🌿 Heavy Forage Equipment
Large balers, self-loading wagons, forage harvesters, silage choppers
🔧 Industrial Applications
Wood chippers, stump grinders, industrial pumps, generators, compressors
🌾 Large-Scale Tillage
Heavy rotary cultivators, deep plows, subsoilers, large power harrows
💧 Liquid Handling
High-capacity slurry tankers, manure injectors, irrigation systems

🛠 安装和使用指南

  1. Match star profiles: Confirm yoke and tube have same lobe count and dimensions.
  2. Clean and inspect: Thoroughly clean surfaces. Inspect for cracks, chips, or wear.
  3. Align and slide: Carefully align the star profile. Use soft mallet if resistance encountered.
  4. Secure the yoke: Install retaining hardware (snap rings, bolts, or collar).
  5. Install heavy-duty cross kit: Use the corresponding heavy-duty cross kit rated for your application.
  6. Lubricate thoroughly: Star applications involve higher loads — ensure generous greasing.

❓ 常见问题解答

Why choose a star yoke over triangular or lemon?
Star profiles distribute torque more evenly across multiple lobes, offering higher capacity and reduced stress concentrations for heavy-duty use.
What is the maximum HP rating?
Series 50 handles 300+ HP when paired with appropriate cross kits and torque limiters.
Do star yokes work with standard safety shields?
Yes, but ensure the shield accommodates the larger D dimension. Heavy-duty shields may be needed for Series 9+.
What is the difference between Series 42 and 50?
Series 42: 42 mm bore, 104.5 mm tube OD. Series 50: 50 mm bore, 118 mm tube OD for highest-torque applications.
Do you supply matching star tubes?
Yes. We manufacture both inner and outer star-profile tubes in all series.
Can star yokes be repaired?
We recommend full replacement rather than repair, as worn bores compromise torque transmission.


应用

🌟 顾客评价

★★★★★

Bruce K. — 🇦🇺 澳大利亚

“These star yokes handle our 250 HP rotary cutter without issue. Forging quality is superior.”

★★★★★

Frank W. — 🇩🇪 德国

“We use these in industrial PTO shaft assemblies for wood processing. Zero failures over 18 months.”

★★★★☆

Luis G. — 🇲🇽 Mexico

“Good heavy-duty yokes at competitive price. Series 9 and 10 fit perfectly on irrigation pump shafts.”

★★★★★

John D. — 🇺🇸 美国

“Outstanding quality for the price. They outsell name-brand equivalents in our dealership.”

★★★★★

Yves B. — 🇫🇷 法国

“Star profile machining is very precise. Cross kits install with perfect alignment.”

⚖ 我们的产品与劣质替代品对比

特征 永恒的力量 低成本替代方案
Torque Capacity Rated for 100-300+ HP Often limited to 80 HP
Lobe Geometry Precision multi-lobe CNC machined Rough-formed lobes, poor contact
Material Premium forged alloy steel Lower grade cast or stamped steel
Bearing Bore Precision ground with snap-ring grooves Drilled only, no retention
Fatigue Resistance Through-hardened, tested to 1M cycles Untested, prone to cracking
Size Range Up to Series 50 (50 mm bore) Typically limited to Series 8

🔗 相关产​​品及配件

Star-Profile PTO Tubes

Inner and outer star tubes in matching series

Heavy-Duty Cross Kits

High-torque universal joint kits for Series 6-50

Wide-Angle Joints

Constant-velocity joints for steep operating angles

Overrunning Clutches

Freewheel protection for driven implements

探索我们的完整内容 PTO轴组件目录 用于匹配零件。

永动力工厂

✅ 认证与质量标准

  • ISO 9001:2015 Quality Management
  • Full Material Traceability (Heat Number)
  • Destructive Testing Reports (Tensile, Impact)
  • Non-Destructive Testing (MPI available)
  • CE Compliance Documentation

🏭 为什么选择 Ever-power？

We specialize in heavy-duty PTO shaft components, with dedicated production lines for star-profile yokes and tubes. Our 25+ years of manufacturing experience and advanced forging and CNC equipment enable us to produce star yokes with tight tolerances demanded by OEM partners worldwide. We maintain strategic inventory of all popular series for rapid fulfillment.

Need Heavy-Duty Star Yokes for Your Project?

Contact our engineering team for specifications, pricing, and custom star yoke solutions.

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