Plain Bore Yoke Type C – Keyway & Threaded Hole
The Plain Bore Yoke Type C provides a dual-lock plain bore connection: a keyway prevents rotation while a threaded set screw hole prevents axial movement. This combination delivers superior retention on round PTO and industrial shafts, making it the preferred choice for vibration-prone installations. Available across series 1 through 8 with threaded holes in M6 through M14, bores from 20 to 45 mm. Forged alloy steel, CNC-machined, heat-treated. ISO 9001:2015 certified by Ever-power.
Plain Bore Yoke Type C – Keyway & Threaded Hole – Round Bore PTO Shaft End Yoke
Plain round bore yoke | Type C | Multiple series | Forged alloy steel
The Ever-power Plain Bore Yoke Type C combines a precision keyway with a radial threaded hole that accepts a standard metric set screw. This dual-lock mechanism addresses both rotational restraint (via the key) and axial retention (via the set screw), delivering the most comprehensive plain bore locking solution short of a full clamp arrangement.
🔧 Technical Specifications
| Series | A (mm) | B (mm) | C (mm) | E (mm) | F (mm) |
|---|---|---|---|---|---|
| 1.05C20 | 22 | 54 | 77 | varies | varies |
| 2.05C20 | 23.8 | 61.3 | 82 | varies | varies |
| 3.05C22 | 27 | 70 | 90 | varies | varies |
| 4.05C25 | 27 | 74.6 | 90 | varies | varies |
| 5.05C30 | 30.2 | 80 | 98 | varies | varies |
| 6.05C35 | 30.2 | 92 | 104 | varies | varies |
| 7.05C40 | 30.2 | 106.5 | 117 | varies | varies |
| 8.05C40 | 35 | 106.5 | 121 | varies | varies |
⭐ Key Features & Benefits
🔑
Dual-Lock System
Keyway prevents rotation; set screw prevents axial drift — comprehensive shaft retention in a single component.
🔩
Metric Threaded Hole
Accepts M6, M8, M10, M12, or M14 set screws — standard hardware available worldwide.
💪
Vibration-Proof Axial Lock
The set screw bears against a shaft flat or dimple, preventing the yoke from walking along the shaft under vibration.
⚙️
Thread-Lock Compatible
Threaded hole is deep enough to accept a set screw with thread-locking compound for permanent installations.
🔄 Compatibility Information
Designed for round shafts with both a keyway and a set-screw flat or dimple. Ideal for gearbox output shafts, industrial motor shafts, and PTO adaptors from SEW-Eurodrive, Bonfiglioli, Nord, Kubota, and John Deere. Popular in applications where vibration may cause axial creep, such as PTO-driven compressors, wood processors, and conveyor drives.
📚 Selection Guide
Step 1: Measure the shaft diameter and keyway width to narrow down the bore and key specifications.
Step 2: Identify the set screw thread size required (check existing shaft dimple or flat).
Step 3: Match bore size, keyway width, and thread size (H column) to the specification table.
Step 4: Order a matching cup-point or dog-point set screw in the correct thread size and apply medium-strength thread locker upon installation.
🌾 Typical Application Scenarios
⚙️ PTO-Driven Compressors
Dual lock prevents axial creep under the pulsating loads typical of reciprocating compressor drives.
🌳 Wood Splitters & Processors
Handles the shock and vibration of hydraulic log splitter PTO drivelines.
💾 Conveyor Drives
Locks securely on keyed gearbox output shafts that drive belts and chain conveyors.
🌾 Precision Agricultural Equipment
Used on GPS-guided seed drills and dosing systems where positional accuracy matters.
🛠️ Installation & Usage Guide
Verify the shaft has both a keyway and a flat or dimple for the set screw; machine one if absent.
Seat the parallel key into the shaft keyway, then align the yoke keyway and slide it into position.
Thread the set screw into the yoke’s radial hole and tighten until it firmly contacts the shaft flat or dimple.
Apply medium-strength thread-locking compound (e.g. Loctite 243) to the set screw for vibration resistance.
Install the cross kit into the yoke ears and secure with retaining rings.
Grease all fittings, rotate by hand to confirm free movement, then test at low RPM.
❓ Frequently Asked Questions
⭐ Customer Reviews
★★★★★
Running Type C on our firewood processor PTO near Ballarat. The dual lock handles the shock loads brilliantly — zero axial shift after hundreds of hours.
Craig A. — 🇦🇺 Australia
★★★★★
We specify Type C for all our conveyor gearbox connections. The keyway-plus-screw combo is the minimum standard in our plant.
Thomas R. — 🇩🇪 Germany
★★★★☆
Reliable dual-lock design. Set screw was included — nice touch. Minor cosmetic mark on the bore entry but functionally perfect.
Isabelle F. — 🇫🇷 France
★★★★★
300 units for our compressor assembly line. Thread quality and keyway accuracy were consistent throughout.
Pradeep J. — 🇮🇳 India
★★★★★
Type C solved our axial creep problem on a PTO-driven post driver. Should have used this from the start.
Chris B. — 🇺🇸 United States
📈 Our Product vs. Low-Quality Alternatives
| Feature | Ever-power Yoke | Low-Quality Alternative |
|---|---|---|
| Retention Method | ✔ Keyway + set screw (dual lock) | ✘ Pin-only (single axis) |
| Axial Security | ✔ Set screw prevents shaft drift | ✘ No axial retention |
| Keyway | ✔ CNC-milled DIN 6885 | ✘ No keyway |
| Thread Quality | ✔ Metric tapped to 6H tolerance | ✘ No threaded hole |
| Material | ✔ Forged C45 steel | ✘ Cast grey iron |
| Quality | ✔ ISO 9001:2015 + set screw included | ✘ No QC documentation |
🔗 Related Products & Accessories
Set Screws (Metric Cup-Point)
Replacement set screws for Type C yokes
Parallel Keys
Standard DIN 6885 keys for keyway engagement
Cross & Bearing Kits
U-joint kits matched to yoke ears
Thread-Locking Compound
Medium-strength adhesive for set screw security
Complete PTO Shafts
Assembled driveline packages with Type C 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 C dual-lock yoke is the solution our customers choose when a simple keyway is not enough. By combining precision keyway milling with a metric threaded hole in a single forged body, we eliminate the need for external collars or clamps. Our 20+ years of manufacturing experience, ISO 9001:2015 certification, and export reach to 50+ countries mean you receive a thoroughly engineered product at a globally competitive price. Each Type C yoke ships with a set screw included.
📞 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
Discover: Our full product range | Request a quote
The Plain Bore Yoke Type C provides a dual-lock plain bore connection: a keyway prevents rotation while a threaded set screw hole prevents axial movement. This combination delivers superior retention on round PTO and industrial shafts, making it the preferred choice for vibration-prone installations. Available across series 1 through 8 with threaded holes in M6 through M14, bores from 20 to 45 mm. Forged alloy steel, CNC-machined, heat-treated. ISO 9001:2015 certified by Ever-power.
