Plain Bore Yoke Type D – Keyway & Clamp Bolt – Round Bore PTO Shaft End Yoke
Plain round bore yoke | Type D | Multiple series | Forged alloy steel
The Ever-power Plain Bore Yoke Type D uses a keyway for rotational lock combined with a split-bore clamp bolt for axial retention. The clamp bolt compresses the bore around the shaft, creating a friction grip that holds the yoke firmly without marking or damaging the shaft surface — perfect for applications requiring frequent disassembly and reassembly.
🔧 Technical Specifications
| Series | A (mm) | B (mm) | C (mm) | E (mm) | F (mm) |
|---|---|---|---|---|---|
| 1.05D20 | 22 | 54 | 77 | varies | varies |
| 2.05D20 | 23.8 | 61.3 | 82 | varies | varies |
| 3.05D22 | 27 | 70 | 90 | varies | varies |
| 4.05D25 | 27 | 74.6 | 90 | varies | varies |
| 5.05D30 | 30.2 | 80 | 98 | varies | varies |
| 6.05D35 | 30.2 | 92 | 104 | varies | varies |
| 7.05D40 | 30.2 | 106.5 | 117 | varies | varies |
| 8.05D40 | 35 | 106.5 | 121 | varies | varies |
⭐ Key Features & Benefits
🔑
Keyway + Split Clamp
Key prevents rotation; split-bore clamp bolt compresses the bore around the shaft for secure, damage-free axial retention.
🔩
Non-Marking Grip
Clamp applies distributed pressure around the entire bore circumference — no point loading or shaft surface damage.
🔄
Unlimited Reassembly Cycles
Unlike interfering bolts or set screws, the clamp can be tightened and released repeatedly with no wear.
💪
High Clamping Force
Grade 10.9 clamp bolt delivers clamping forces exceeding 15 kN for vibration-proof retention.
🔄 Compatibility Information
Ideal for precision-ground round shafts that must remain undamaged. Works with output shafts from test benches, dynamometers, rental equipment fleets, prototype machinery, and exhibition demonstration units. Also suited for high-value shafts on John Deere, CLAAS, Fendt, and Case IH equipment where the operator wants to preserve the shaft for future refitting.
📚 Selection Guide
Step 1: Measure the shaft diameter with a micrometer — clamp yokes require a tight initial fit (H7/h6).
Step 2: Match bore diameter and keyway width to the specification table.
Step 3: Confirm the clamp bolt torque rating (G column) is adequate for your application load.
Step 4: Use a calibrated torque wrench during installation to achieve the specified bolt tightening torque.
🌾 Typical Application Scenarios
⚙️ Test Rigs & Dynamometers
Damage-free clamping allows rapid shaft changes during powertrain testing.
🔄 Rental Equipment Fleets
Yokes can be removed and refitted across multiple machines without shaft wear.
🌿 Exhibition & Demo Machines
Clean removal leaves shafts unmarked for showroom-quality presentation.
💾 Prototype Development
Supports iterative design changes requiring frequent driveline reconfiguration.
🛠️ Installation & Usage Guide
Loosen the clamp bolt fully and open the split bore to its maximum clearance.
Insert the parallel key into the shaft keyway.
Slide the yoke onto the shaft, aligning the keyway with the key.
Tighten the clamp bolt progressively using a torque wrench to the specified value (refer to product data sheet).
Verify the yoke is rotationally locked (via key) and axially immovable (via clamp).
Fit the cross kit, grease all zerks, and test at idle speed before engaging full PTO RPM.
❓ Frequently Asked Questions
▶ Does the clamp damage the shaft?
▶ What bolt torque should I use?
▶ Can I use Type D without the keyway key?
▶ How does Type D compare to Type C?
▶ Is the clamp bolt included?
▶ Suitable for high-speed applications?
⭐ Customer Reviews
★★★★★
We operate a machinery hire business in rural NSW. Type D yokes let us swap drivelines between machines without wrecking the shafts. Game-changer for our fleet.
Brett S. — 🇦🇺 Australia
★★★★★
We use Type D on our engine test dynamometers. Shaft changes in minutes with no surface damage. Superb engineering.
Markus L. — 🇩🇪 Germany
★★★★☆
Excellent clamping force. The included Grade 10.9 bolt inspires confidence. Only wish bore sizes up to 50 mm were offered.
Antoine V. — 🇫🇷 France
★★★★★
Prototype workshop uses these extensively. Unlimited reassembly cycles — exactly what we need for iterative development.
Anjali R. — 🇮🇳 India
★★★★★
Installed on our county fair demonstration tractor. Clean removal after the show — shaft looks brand new.
Ryan M. — 🇺🇸 United States
📈 Our Product vs. Low-Quality Alternatives
| Feature | Ever-power Yoke | Low-Quality Alternative |
|---|---|---|
| Retention | ✔ Keyway + split clamp (damage-free) | ✘ Set screw (marks shaft) |
| Reassembly | ✔ Unlimited cycles, no wear | ✘ Shaft groove wears with each removal |
| Clamp Force | ✔ Grade 10.9 bolt, 15+ kN | ✘ Finger-tight set screw |
| Shaft Condition | ✔ Shaft remains unmarked | ✘ Dimple/groove required |
| Material | ✔ Forged C45 steel | ✘ Cast iron |
| Quality | ✔ ISO 9001:2015 + torque spec provided | ✘ No torque guidance |
🔗 Related Products & Accessories
Replacement Clamp Bolts
Grade 10.9 bolts for Type D yokes
Parallel Keys
DIN 6885 keys for keyway engagement
Cross & Bearing Kits
U-joint kits for yoke ear connections
Torque Wrenches
Calibrated wrenches for correct clamp bolt tightening
Complete PTO Shafts
Assembled drivelines with Type D yokes
🏆 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 Type D clamp yoke is the premium choice in our plain bore range. The split-bore clamp design was developed in collaboration with European dynamometer manufacturers who demanded damage-free shaft retention with unlimited reassembly. Each yoke ships with a Grade 10.9 clamp bolt and a torque specification card. Our 20+ years of precision machining, ISO 9001:2015 certification, and 50+ country distribution network ensure you receive a world-class product.
📞 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.
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