Description
Plain Bore Yoke Type D (Keyway & Clamp Bolt) — Maximum-Strength Clamped PTO Yoke for Extreme Loads
The Plain Bore Yoke Type D-Keyway & Clamp Bolt provides the absolute maximum shaft retention force of any plain bore yoke in our range. A precision split in the yoke body allows a through-bolt to compress the bore around the shaft, generating friction grip equivalent to several tons of radial force. Combined with the keyway for positive rotational drive, this creates a virtually immovable connection suitable for the most brutal operating conditions: stone crushers, stump grinders, industrial shredders, and any equipment subjected to extreme shock loading or torque reversals.
🔧 Technical Specifications
| Series | A(mm) | B(mm) | C(mm) | D(mm) | E(mm) | F(mm) | G(mm) |
|---|---|---|---|---|---|---|---|
| 1.05D20-D32 | 22 | 54 | 93 | 21 | 6-10 | 12.8-19.3 | 20-32 |
| 2.05D25-D32 | 23.8 | 61.3 | 102 | 21 | 8-10 | 15.8-19.3 | 25-32 |
| 3.05D25-D35 | 27 | 70 | 108 | 21 | 8-12 | 15.8-20.8 | 25-35 |
| 4.05D25-D38 | 27 | 74.6 | 108 | 21 | 8-10 | 15.8-22.3 | 25-38 |
| 5.05D32-D40 | 30.2 | 80 | 108 | 21 | 10-12 | 19.3-23.3 | 32-40 |
| 6.05D30-D50 | 30.2 | 92 | 118 | 21 | 8-14 | 18.3-28.8 | 30-50 |
| 7.05D30-D40 | 30.2 | 106.5 | 130 | 25 | 8-12 | 18.3-23.3 | 30-40 |
| 8.05D30-D45 | 35 | 106.5 | 130 | 25 | 8-14 | 18.3-26.3 | 30-45 |
⭐ Key Features & Benefits
💪 Maximum Clamping Force
Split-body bolt compression generates tons of radial grip — the strongest retention of any plain bore yoke type.
🔑 Keyway + Clamp Dual System
Keyway handles primary torque; clamp bolt adds friction grip that resists shock loads, reversals, and vibration.
⚖ Shock & Reversal Rated
Designed for applications with sudden torque spikes and load reversals that would loosen set screws or walk out circlips.
🔒 Controlled Clamp Release
Connection is only released by deliberate bolt loosening — no accidental separation possible under any operating condition.
🔧 Split-Body Engineering
The precision-machined split and bolt channel maintain concentricity under clamping load, avoiding bore distortion.
🔥 Fatigue-Rated Clamp Zone
Clamp area is specially heat-treated to resist fatigue cracking from repeated high-stress clamping cycles.
🔄 Compatibility Information
Fits keyed cylindrical shafts in 20-50 mm range. The preferred choice for extreme-duty connections on industrial and agricultural equipment from all manufacturers. Particularly specified for shredders, crushers, grinders, and heavy forestry equipment.
📚 Selection Guide
Choose Type D when: Your application involves impact loads, torque reversals, or extreme vibration that defeats lighter retention methods (pins, set screws, circlips).
Clamp Bolt Torque: Tighten progressively to the recommended torque (varies by series, typically 40-80 Nm). Do not exceed — bore distortion can result.
🌾 Typical Application Scenarios
Stone crushers, shredders, industrial grinders, recycling equipment
Stump grinders, log splitters, wood chippers, bark processors
Equipment with bidirectional rotation or sudden torque reversals
Vibratory screens, compactors, and demolition equipment
🛠 Installation & Usage Guide
- Loosen clamp bolt fully: Open the split bore for shaft insertion.
- Install key and slide yoke: Seat key, align keyway, push yoke to position.
- Progressively tighten clamp bolt: Tighten in stages to recommended torque. Verify concentricity.
- Check for bore distortion: Rotate the shaft — it should turn smoothly with no binding.
- Install cross kit: Mount universal joint and PTO components.
- Periodic checks: Re-torque clamp bolt every 50 hours in extreme applications.
❓ Frequently Asked Questions
🌟 Customer Reviews
Brett A. — 🇦🇺 Australia
“Solved our chronic yoke-slipping problem on a rock crusher PTO. The clamp bolt grip is extraordinary — this yoke is not going anywhere.”
Karl-Heinz D. — 🇩🇪 Germany
“We specify Type D for all our forestry equipment PTO connections. The shock load resistance is unmatched.”
Thiago P. — 🇧🇷 Brazil
“Heavy-duty yoke for our sugarcane shredder. The split-clamp design is well-engineered and holds under severe conditions.”
Larry F. — 🇺🇸 United States
“Nothing else would hold on our stump grinder PTO shaft. Type D clamp bolt solved the problem permanently.”
Philippe M. — 🇫🇷 France
“Industrial-grade retention. The fatigue-rated clamp zone is a thoughtful engineering detail that gives us confidence in critical applications.”
⚖ Our Product vs. Inferior Alternatives
| Feature | Ever-power | Low-Cost Alternatives |
|---|---|---|
| Retention Strength | Maximum — tons of radial clamp force | Light friction or pin shear |
| Shock Load Resistance | Designed for extreme impacts | Prone to loosening |
| Torque Reversal | Clamp holds through reversals | May slip on reversal |
| Bore Concentricity | Precision split maintains roundness | No clamp feature |
| Quality | ISO 9001, fatigue-rated | No qualification |
| Application Range | Extreme industrial & agricultural | Light to medium duty only |
🔗 Related Products & Accessories
Grade 12.9 Clamp Bolts
High-tensile replacement bolts
Anti-Seize Compound
For clamp bolt threads
Type C Yokes
Lighter-duty keyway + set screw alternative
Heavy-Duty Cross Kits
Matching u-joints for extreme applications
Explore our full PTO shaft components catalog for matching parts.
✅ Certifications & Quality Standards
- ISO 9001:2015 Certified
- Clamp Force Verification Testing
- Split-Body Concentricity Reports
- Fatigue Testing (10,000 clamp cycles)
- Grade 10.9+ Bolt Certification
🏭 Why Choose Ever-power?
Type D clamp bolt yokes require the most sophisticated manufacturing in our plain bore range — precision split machining must maintain perfect concentricity under clamping load. We invested in wire-EDM cutting capability specifically for this product, ensuring split surfaces that mate perfectly and distribute clamping force evenly. Our Type D yokes are the retention method of choice for three major European forestry equipment OEMs.
The Strongest Plain Bore Connection Available
When nothing less than maximum grip will do, Type D clamp bolt yokes deliver. Contact us for extreme-duty applications.
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