Plain Bore Yoke Type B – Keyway
The Plain Bore Yoke Type B is a round-bore PTO end yoke with a precision-milled keyway for positive torque transmission. The key engagement prevents rotational slip, making it superior to pin-only retention for medium and heavy-duty applications. Available across series 1 through 8 with bores from 20 to 45 mm, keyways follow DIN 6885 standards. Forged from alloy steel, CNC-machined, and heat-treated, this yoke delivers robust performance on agricultural, industrial, and custom drivelines worldwide.
Plain Bore Yoke Type B – Keyway – Round Bore PTO Shaft End Yoke
Plain round bore yoke | Type B | Multiple series | Forged alloy steel
The Ever-power Plain Bore Yoke Type B incorporates a precisely milled keyway within its round bore. A standard parallel key seated in both the yoke and shaft keyways locks the two components together rotationally, preventing any torque-induced slippage. This approach is favoured for medium to heavy-duty applications where the pin-only method of Type A may not provide sufficient torque capacity.
🔧 Technical Specifications
| Series | A (mm) | B (mm) | C (mm) | E (mm) | F (mm) |
|---|---|---|---|---|---|
| 1.05B20 | 22 | 54 | 77 | varies | varies |
| 2.05B20 | 23.8 | 61.3 | 82 | varies | varies |
| 3.05B22 | 27 | 70 | 90 | varies | varies |
| 4.05B25 | 27 | 74.6 | 90 | varies | varies |
| 5.05B30 | 30.2 | 80 | 98 | varies | varies |
| 6.05B35 | 30.2 | 92 | 104 | varies | varies |
| 7.05B40 | 30.2 | 106.5 | 117 | varies | varies |
| 8.05B40 | 35 | 106.5 | 121 | varies | varies |
⭐ Key Features & Benefits
🔑
DIN 6885 Keyway
Keyway milled to international standards guarantees interchangeability with off-the-shelf parallel keys.
💪
Positive Torque Lock
Key engagement eliminates rotational slip — a significant upgrade over pin-only retention for higher torque loads.
🔄
Broad Bore & Key Range
Multiple bore diameters (20–45 mm) paired with appropriate keyway widths (E dimension) for precise matching.
⚙️
Axial Retention Options
Can be paired with a set screw or external snap ring for additional axial security if required.
🔄 Compatibility Information
Designed for round PTO and industrial shafts with a standard keyway. Works with keyed output shafts from gearboxes, pumps, alternators, and tractor PTO adaptors. Compatible with parallel keys per DIN 6885 / ANSI B17.1. Particularly popular for industrial pump drives, stationary generators, and agricultural equipment with keyed shaft ends such as Kubota, Yanmar, and John Deere compact tractor PTOs.
📚 Selection Guide
Step 1: Measure the shaft outer diameter and the existing keyway width and depth.
Step 2: Cross-reference with the specification table to identify the correct bore (A) and keyway (E) combination.
Step 3: Select a standard parallel key of matching width and length — typically supplied separately.
Step 4: For additional axial retention, consider adding an external circlip or pairing with a Type C yoke (keyway + threaded set screw).
🌾 Typical Application Scenarios
💾 Industrial Pump Drives
Keyed connection provides reliable torque lock for PTO-driven centrifugal, piston, and diaphragm pumps.
⚡ Generator & Alternator Drives
Consistent keyed engagement ensures stable RPM on PTO-powered electrical generators.
🌾 Medium-Duty Agricultural Implements
Suitable for fertiliser injectors, seed treaters, and other equipment with keyed input shafts.
🏭 Conveyor Systems
Connects driveline to keyed input shafts on grain elevators and belt conveyors.
🛠️ Installation & Usage Guide
Inspect both the yoke keyway and shaft keyway for burrs or debris; clean thoroughly.
Insert the parallel key into the shaft keyway — the key should fit snugly without excessive force.
Align the yoke keyway with the key and slide the yoke onto the shaft until fully seated.
Confirm the key is fully engaged in both keyways — no exposed key edges should be visible.
If axial retention is needed, install an external circlip or apply thread-locking compound to a set screw if the yoke has a threaded hole.
Attach the cross kit, grease all fittings, and test at low RPM before operating at full PTO speed.
❓ Frequently Asked Questions
⭐ Customer Reviews
★★★★★
We use Type B on our irrigation pump PTO near Griffith, NSW. The keyed connection is rock-solid — no slip even at peak draw.
Nathan K. — 🇦🇺 Australia
★★★★☆
Good quality keyway finish. The DIN 6885 compliance makes sourcing replacement keys easy throughout Europe.
Martin H. — 🇩🇪 Germany
★★★★★
Fitted to our generator drive — stable RPM output with zero rotational play. Very pleased.
Claire D. — 🇫🇷 France
★★★★★
Bulk order of 300 pieces for our pump manufacturing line. Keyway accuracy was consistent across the entire batch.
Suresh M. — 🇮🇳 India
★★★★☆
Solid yoke for the price. Only wish a key was included but understand shafts vary. Still 4 stars for quality.
Kevin P. — 🇺🇸 United States
📈 Our Product vs. Low-Quality Alternatives
| Feature | Ever-power Yoke | Low-Quality Alternative |
|---|---|---|
| Keyway | ✔ CNC-milled to DIN 6885 ±0.02 mm | ✘ Rough-cut with inconsistent width |
| Bore Finish | ✔ H7 precision-reamed | ✘ Loose-tolerance boring |
| Material | ✔ Forged C45 alloy steel | ✘ Cast iron |
| Torque Capacity | ✔ Key provides positive torque lock | ✘ Pin-only, prone to shearing |
| Surface | ✔ Zinc-plated anti-corrosion | ✘ Untreated bare metal |
| Quality | ✔ ISO 9001:2015 certified | ✘ No quality standards |
🔗 Related Products & Accessories
Parallel Keys (DIN 6885)
Standard keys for pairing with Type B yokes
Cross & Bearing Kits
U-joint kits sized for yoke ear dimensions
PTO Safety Shields
Protective rotating guards
Keyed Round Shafts
Pre-machined shafts with standard keyways
Complete PTO Shafts
Assembled keyed-connection 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 B keyway yoke is the product of choice for operators who demand positive torque lock on a round bore. Every keyway is CNC-milled to DIN 6885 tolerances on the same machining centres that produce our splined and gear yokes. With over 20 years of global supply experience, ISO 9001:2015 quality assurance, and shipments to 50+ countries, we combine European-grade precision with competitive pricing. Our engineers are available for torque calculations and custom keyway configurations.
📞 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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The Plain Bore Yoke Type B is a round-bore PTO end yoke with a precision-milled keyway for positive torque transmission. The key engagement prevents rotational slip, making it superior to pin-only retention for medium and heavy-duty applications. Available across series 1 through 8 with bores from 20 to 45 mm, keyways follow DIN 6885 standards. Forged from alloy steel, CNC-machined, and heat-treated, this yoke delivers robust performance on agricultural, industrial, and custom drivelines worldwide.
