Plain Bore Yoke Type H – Pin Hole & Threaded Hole – Round Bore PTO Shaft End Yoke
Plain round bore yoke | Type H | Multiple series | Forged alloy steel
The Ever-power Plain Bore Yoke Type H features a transverse pin hole combined with a radial threaded set-screw hole, providing dual-axis retention on round PTO shafts. The pin prevents rotation while the set screw independently locks axial position. This dual-mechanism approach is the strongest plain bore retention method available, engineered for applications where both rotational and axial forces are significant.
🔧 Technical Specifications
| Series | A (mm) | B (mm) | C (mm) | E (mm) | F (mm) |
|---|---|---|---|---|---|
| 1.05H20 | 22 | 54 | 77 | varies | varies |
| 2.05H20 | 23.8 | 61.3 | 82 | varies | varies |
| 3.05H22 | 27 | 70 | 90 | varies | varies |
| 4.05H25 | 27 | 74.6 | 90 | varies | varies |
| 5.05H30 | 30.2 | 80 | 98 | varies | varies |
| 6.05H35 | 30.2 | 92 | 104 | varies | varies |
| 7.05H40 | 30.2 | 106.5 | 117 | varies | varies |
| 8.05H40 | 35 | 106.5 | 121 | varies | varies |
⭐ Key Features & Benefits
🔨
Dual-Mechanism Retention
Transverse pin handles rotational loads; radial set screw independently secures axial position — two independent retention axes.
🔩
Threaded Radial Hole
Accepts M6, M8, or M10 cup-point set screws for positive axial locking against a shaft flat.
💪
Strongest Plain Bore Option
Two independent locking mechanisms provide the highest retention force in our plain bore range.
⚙️
Reversing-Load Capable
Dual retention withstands applications with alternating torque direction and axial thrust without any loosening.
🔄 Compatibility Information
Engineered for high-vibration and reversing-torque installations on round PTO shafts. Ideal for equipment like PTO-driven reciprocating pumps, concrete mixers, stump grinders, flail mowers, and horizontal directional drills. Compatible with output shafts from major agricultural OEMs and industrial gearbox manufacturers including Dana, ZF, Walterscheid, and Comer Industries.
📚 Selection Guide
Step 1: Confirm the shaft has (or can be machined with) both a transverse pin hole and a set-screw flat.
Step 2: Measure the shaft diameter, pin hole diameter, and thread size to match the spec table.
Step 3: Select the appropriate yoke series, noting both pin and thread dimensions (F and G columns).
Step 4: Always install both the pin and the set screw — using only one defeats the dual-lock purpose.
🌾 Typical Application Scenarios
⚙️ Reciprocating Pumps
Pulsating loads create both rotational and axial forces that require dual retention.
🌿 Flail Mowers & Stump Grinders
Impact loads from striking obstacles generate torque reversals that can loosen single-axis retention.
💾 Concrete Mixers
Heavy rotating drum loads combined with vibration demand the strongest possible shaft retention.
🏭 Horizontal Directional Drills
Drill string torque reversals and axial thrust during bore-back operations require dual-axis security.
🛠️ Installation & Usage Guide
Confirm the shaft has a transverse pin hole and a set-screw flat (or machine both if absent).
Slide the Type H yoke onto the shaft and align the transverse pin hole with the shaft hole.
Insert and seat the retaining pin (roll pin or clevis pin with cotter).
Thread the set screw into the radial hole and tighten against the shaft flat using a hex key.
Apply medium-strength thread locker to the set screw for vibration resistance.
Install the cross kit, grease all fittings, and perform a low-speed test with load before full-speed operation.
❓ Frequently Asked Questions
▶ Why does Type H have both a pin and a set screw?
▶ Can I use Type H with only the pin installed?
▶ How does Type H compare to Type C (keyway + screw)?
▶ What set screw size is standard?
▶ Is this suitable for 1000 RPM?
▶ Set screw and pin included?
⭐ Customer Reviews
★★★★★
Type H on our stump grinder PTO near Coffs Harbour. The dual lock handles the violent torque reversals when we hit roots. Absolutely essential for this application.
Jason L. — 🇦🇺 Australia
★★★★★
We specify Type H for all our reciprocating pump drivelines. The dual retention is the only method we trust under pulsating loads.
Rainer B. — 🇩🇪 Germany
★★★★☆
Robust design, well-machined. The pin and set screw were both included and correct spec. Good product.
Emilie G. — 🇫🇷 France
★★★★★
400 units for our concrete mixer production line. Dual retention eliminates field callbacks for loose yokes.
Amit P. — 🇮🇳 India
★★★★★
The only plain bore yoke strong enough for our directional drill PTO. Both retention mechanisms work together beautifully.
Travis K. — 🇺🇸 United States
📈 Our Product vs. Low-Quality Alternatives
| Feature | Ever-power Yoke | Low-Quality Alternative |
|---|---|---|
| Retention Axes | ✔ Two independent (rotational + axial) | ✘ Single axis (pin or screw only) |
| Rotational Lock | ✔ Hardened transverse pin | ✘ Friction only |
| Axial Lock | ✔ Set screw against shaft flat | ✘ No axial retention |
| Material | ✔ Forged C45 steel | ✘ Cast grey iron |
| Included Hardware | ✔ Pin + set screw + cotter | ✘ No hardware included |
| Quality | ✔ ISO 9001:2015 certified | ✘ No documentation |
🔗 Related Products & Accessories
Retaining Pins & Cotters
Replacement pin and cotter sets for Type H
Set Screws (Cup-Point)
Metric set screws for radial hole
Cross & Bearing Kits
U-joint kits matched to Type H ears
Thread-Locking Compound
Medium-strength adhesive for set screw
Complete PTO Shafts
Assembled high-retention driveline packages
🏆 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 H dual-retention yoke was born from the real-world failure modes reported by operators running reciprocating pumps, stump grinders, and directional drills. Single-axis retention simply was not enough for these applications. By combining a pin and a set screw in one forged body, we created the strongest plain bore yoke in our catalogue. ISO 9001:2015 certified, 20+ years of engineering heritage, and delivered to 50+ countries worldwide — Type H is proof that we listen to the field.
📞 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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