Description
Plain Bore Yoke Type B (Keyway) — Zero-Slip Keyed Connection for High-Torque PTO Applications
The Plain Bore Yoke Type B-Keyway upgrades the standard cylindrical bore with a precision-broached keyway, transforming it from a pin-dependent to a key-driven connection. A standard parallel key seated in the matching keyway creates a positive mechanical interlock that transfers torque through compressive bearing surfaces rather than pin shear. This results in significantly higher torque capacity, zero rotational play, and predictable load distribution. Type B is specified for applications where rotational accuracy matters — gearbox inputs, precision equipment, and any shaft connection where even microscopic angular slippage is unacceptable.
🔧 Technical Specifications
| शृंखला | A(mm) | B(mm) | C(mm) | D(mm) | E(mm) | F(mm) |
|---|---|---|---|---|---|---|
| 1.05B20 | 22 | 54 | 77 | 20 | 6 | 12.8 |
| 1.05B22 | 22 | 54 | 77 | 22 | 6 | 13.8 |
| 1.05B25 | 22 | 54 | 77 | 25 | 8 | 15.8 |
| 1.05B30 | 22 | 54 | 77 | 30 | 8 | 18.3 |
| 3.05B22 | 27 | 70 | 90 | 22 | 6 | 13.8 |
| 3.05B25 | 27 | 70 | 90 | 25 | 8 | 15.8 |
| 3.05B30 | 27 | 70 | 90 | 30 | 8 | 18.3 |
| 3.05B35 | 27 | 70 | 90 | 35 | 10 | 20.8 |
| 5.05B30 | 30.2 | 80 | 98 | 30 | 8 | 18.3 |
| 5.05B35 | 30.2 | 80 | 98 | 35 | 10 | 20.8 |
| 5.05B40 | 30.2 | 80 | 98 | 40 | 12 | 23.3 |
| 6.05B30 | 30.2 | 92 | 104 | 30 | 8 | 18.3 |
| 6.05B35 | 30.2 | 92 | 104 | 35 | 10 | 20.8 |
| 6.05B40 | 30.2 | 92 | 104 | 40 | 12 | 23.3 |
| 6.05B42 | 30.2 | 92 | 104 | 42 | 12 | 24.3 |
| 7.05B35 | 30.2 | 106.5 | 117 | 35 | 10 | 20.8 |
| 7.05B40 | 30.2 | 106.5 | 117 | 40 | 12 | 23.3 |
| 7.05B42 | 30.2 | 106.5 | 117 | 42 | 12 | 24.3 |
| 7.05B45 | 30.2 | 106.5 | 117 | 45 | 14 | 26.3 |
| 8.05B35 | 35 | 106.5 | 121 | 35 | 10 | 20.8 |
| 8.05B40 | 35 | 106.5 | 121 | 40 | 12 | 23.3 |
| 8.05B42 | 35 | 106.5 | 121 | 42 | 12 | 24.3 |
| 8.05B45 | 35 | 106.5 | 121 | 45 | 14 | 26.3 |
⭐ Key Features & Benefits
🔑 Precision-Broached Keyway
Machine-cut keyway slot to DIN 6885 standard ensures exact key fit and maximum load-bearing contact area.
💪 Superior Torque Transfer
Key-driven connection handles 2-3× the torque of an equivalent pin-hole yoke before any risk of failure.
⚖ Zero Angular Slippage
The key-and-keyway interlock eliminates rotational play — critical for timing-sensitive equipment like seed drills and precision applicators.
📐 DIN 6885 Standard Keys
Keyway dimensions correspond to standard key sizes (6×6 through 14×9 mm), ensuring readily available key stock.
🔧 Controlled Bore + Keyway
Both bore (H7) and keyway (P9/JS9) are machined to standard tolerances for predictable, repeatable assembly.
🔥 Hardened Keyway Surfaces
Keyway edges are induction hardened to resist peening and deformation under heavy cyclic loading.
🔄 Compatibility Information
Fits cylindrical shafts with standard DIN 6885 keyways in 20-45 mm diameter range. Compatible with gearbox inputs from all major manufacturers including Comer, Bondioli, Brevini, SEW-Eurodrive, and Nord Drivesystems. Also fits industrial pump, mixer, and conveyor drive shafts.
📚 Selection Guide
Step 1 — Measure Shaft & Keyway: Record shaft diameter, keyway width, and keyway depth. Match to the E, D, and F dimensions.
Step 2 — Verify Key Standard: Most applications use DIN 6885 parallel keys. Confirm your shaft uses this standard.
Step 3 — Select Appropriate Key Material: Standard C45 steel keys for normal duty. Stainless keys for corrosive environments.
🌾 Typical Application Scenarios
Right-angle gearboxes, speed reducers, and power distribution boxes requiring keyed shaft connections
Seed drills, precision planters, and metering devices where zero angular play is critical
High-torque pump drives where pin retention would be inadequate
Industrial conveyors, mixers, and processing machinery with keyed shaft inputs
🛠 Installation & Usage Guide
- Insert key into shaft keyway: Seat a standard DIN 6885 key into the shaft keyway first.
- Align yoke keyway: Orient the yoke so its keyway aligns with the key protruding from the shaft.
- Slide yoke onto shaft: Push the yoke onto the shaft, ensuring the key engages the yoke keyway smoothly.
- Secure axially: Use a set screw, circlip, or end plate to prevent axial movement (Type B does not include axial retention — add separately if needed).
- Check key fit: There should be no rotational play. If loose, the key may be undersized — replace with the correct size.
- Assemble PTO shaft: Install cross kit and remaining components.
❓ Frequently Asked Questions
🌟 Customer Reviews
Murray T. — 🇦🇺 Australia
“The keyway broaching is clean and accurate. These yokes fit our gearbox input shafts with zero play when keyed. Excellent quality.”
Gerhard F. — 🇩🇪 Germany
“We specify Type B for all our precision equipment connections. The keyway tolerance is consistently within DIN spec.”
Eduardo M. — 🇧🇷 Brazil
“Good keyed yoke at a fair price. The bore and keyway quality match European manufacturers.”
Bob R. — 🇺🇸 United States
“The step up from pin-hole to keyway makes a huge difference in our high-torque pump drive application. No more pin failures.”
Monique J. — 🇫🇷 France
“Broaching quality is excellent — clean cuts, no burrs. Key fit is precise. Using these on all our keyed shaft connections.”
⚖ Our Product vs. Inferior Alternatives
| Feature | कभी-शक्ति | Low-Cost Alternatives |
|---|---|---|
| Torque Capacity | 2-3× higher than pin-hole (key compression) | Relies on pin shear strength |
| Rotational Play | Absolute zero with proper key | Slight play possible with worn pins |
| Keyway Quality | DIN 6885 broached, P9 tolerance | Poorly cut or off-standard |
| Bore Tolerance | H7 CNC bored | Rough-drilled |
| Material | Forged 40Cr alloy steel | Cast or mild steel |
| Certification | ISO 9001:2015, DIN compliance | No standards |
🔗 Related Products & Accessories
Standard DIN 6885 Key Stock
Parallel keys in all standard sizes
Type C Yokes (Keyway + Set Screw)
Adds axial retention to the keyway connection
Type D Yokes (Keyway + Clamp Bolt)
Strongest keyed bore retention
क्रॉस किट
Universal joint kits for all series
Explore our full PTO shaft components catalog for matching parts.
✅ Certifications & Quality Standards
- ISO 9001:2015 Certified
- DIN 6885 Keyway Compliance
- H7 Bore Verification
- Keyway Surface Hardness Testing
- CMM Dimensional Inspection
🏭 Why Choose Ever-power?
Our keyway broaching department operates 8 dedicated vertical broaching machines capable of cutting keyways in bore sizes from 15 mm to 60 mm. We process over 150,000 keyed yokes annually, making us one of the largest keyed bore yoke producers in Asia. Every keyway is cut in a single pass using premium HSS broach tools, ensuring consistent DIN 6885 compliance across every unit.
Upgrade to Keyed Connections for Maximum Torque
Type B keyway yokes provide the positive drive that pin-hole designs cannot match. Request a quote for your keyed shaft application.
