Description
Plain Bore Yoke Type H (Pin Hole & Threaded Hole) — Redundant Dual-Lock PTO Yoke for Safety-Critical Applications
The Plain Bore Yoke Type H-Pin Hole & Threaded Hole applies the engineering principle of redundancy to PTO shaft retention. In safety-critical applications — overhead PTO-driven equipment, public-area maintenance machinery, or high-value processing lines where unplanned downtime is catastrophic — relying on a single retention mechanism introduces unacceptable risk. Type H eliminates this risk by providing two completely independent locking methods: a roll pin and a set screw. Each is individually capable of maintaining the connection; together, they create a fail-safe system that requires simultaneous failure of both mechanisms for separation to occur.
🔧 Technical Specifications
| Series | A(mm) | B(mm) | C(mm) | D(mm) | E(mm) | F(mm) | G |
|---|---|---|---|---|---|---|---|
| 1.05H20-H31.8 | 22 | 54 | 77 | 15-18.5 | 20-31.8 | 6-10 | M6 |
| 2.05H20-H30 | 23.8 | 61.3 | 82 | 15 | 20-30 | 6-10 | M6 |
| 3.05H22-H35 | 27 | 70 | 90 | 15-20 | 22-35 | 8-13 | M6 |
| 4.05H22-H35 | 27 | 74.6 | 90 | 20 | 22-35 | 8-13 | M6 |
| 5.05H30-H40 | 30.2 | 80 | 98 | 20 | 30-40 | 10-13 | M6-M8 |
| 6.05H30-H42 | 30.2 | 92 | 104 | 20 | 30-42 | 10-13 | M8-M10 |
| 7.05H35-H45 | 30.2 | 106.5 | 117 | 25 | 35-45 | 13 | M8-M10 |
| 8.05H35-H45 | 35 | 106.5 | 121 | 25 | 35-45 | 13 | M8-M10 |
⭐ Key Features & Benefits
🛡 Redundant Dual-Lock System
Two independent retention mechanisms — even if one loosens, the other holds. True fail-safe engineering.
🔒 Roll Pin — Primary Lock
Cross-drilled pin provides positive rotational and axial retention as the primary mechanism.
🔧 Set Screw — Secondary Lock
Threaded set screw provides backup axial retention and anti-vibration security as the secondary mechanism.
⚖ Safety-Critical Rated
Specified for applications where yoke separation could cause equipment damage, environmental harm, or personal injury.
📐 Full Bore Range
Available in 20-45 mm bore sizes across Series 1-8, covering all standard implement shaft diameters.
💪 Same Premium Construction
Forged alloy steel, H7 bore, induction-hardened bearing areas — identical to all other types in our range.
🔄 Compatibility Information
Fits cylindrical shafts with both cross-drilled pin hole and flat/dimple for set screw contact. For safety-critical applications across all equipment types. Specified by overhead crane PTO drives, public-area maintenance equipment manufacturers, and high-reliability industrial systems.
📚 Selection Guide
Specify Type H when: Your risk assessment identifies yoke separation as a high-consequence event — overhead equipment, public-area machinery, or high-value continuous production lines.
Inspection Protocol: Check both the pin AND the set screw at regular intervals. The dual-lock system is only fail-safe if both mechanisms are maintained.
🌾 Typical Application Scenarios
Overhead PTO drives, equipment in public areas, automated processing lines
Continuous production machinery where unplanned stops cost thousands per hour
Slurry pumps, chemical mixers, and equipment where separation could cause spills
Installations requiring documented dual-retention per safety audits
🛠 Installation & Usage Guide
- Install primary pin: Seat the roll pin through both yoke and shaft pin holes.
- Install secondary set screw: Thread set screw with medium-strength thread lock and tighten against shaft.
- Verify both mechanisms: Attempt to rock and pull the yoke — no movement should be detected.
- Document installation: Record pin size, set screw torque, and date for maintenance tracking.
- Install cross kit: Complete PTO shaft assembly.
- Establish inspection schedule: Check both pin and set screw at intervals specified by your safety protocol.
❓ Frequently Asked Questions
🌟 Customer Reviews
Colin B. — 🇦🇺 Australia
“We specify Type H for all PTO connections on our public-area maintenance equipment fleet. The dual-lock gives us confidence for safety compliance.”
Martin Z. — 🇩🇪 Germany
“Required by our safety auditor for overhead PTO applications. The dual retention concept is sound and the execution quality is excellent.”
André F. — 🇧🇷 Brazil
“Using Type H on our chemical processing pump drives. The redundancy gives us peace of mind for hazardous material applications.”
Patrick H. — 🇺🇸 United States
“Our insurance company recommended dual-retention PTO yokes for our processing plant. Type H meets the requirement perfectly.”
Marie-Claire B. — 🇫🇷 France
“Professional-grade safety component. We document each installation for our ISO safety audits and Type H provides the dual-lock evidence required.”
⚖ Our Product vs. Inferior Alternatives
| Feature | Ever-power | Low-Cost Alternatives |
|---|---|---|
| Retention Redundancy | Two independent mechanisms | Single mechanism only |
| Failure Mode Protection | Fail-safe: both must fail | Single point of failure |
| Safety Audit Compliance | Documented dual-lock | May not satisfy auditors |
| Maintenance Protocol | Inspect both mechanisms | Inspect single mechanism |
| Quality | ISO 9001:2015, precision machined | Variable quality |
| Application Rating | Safety-critical approved | General purpose only |
🔗 Related Products & Accessories
Safety Audit Documentation Kits
Installation and inspection record templates
Type A Yokes
Single-retention for general-purpose applications
Lock Wire & Safety Hardware
Additional anti-loosening provisions
Kits croisés
Universal joints for all series
Explore our full PTO shaft components catalog for matching parts.
✅ Certifications & Quality Standards
- ISO 9001:2015 Certified
- Dual-Retention Pull-Out Force Testing
- Thread Quality Gauging
- Pin Hole Positional Accuracy
- Safety-Critical Application Documentation
🏭 Why Choose Ever-power?
Type H embodies our commitment to safety-first engineering. We developed this dual-lock design in response to European safety directives requiring redundant retention for PTO connections in public-space maintenance equipment. Our quality assurance team performs 100% pin-hole and thread inspection on every Type H yoke — no statistical sampling — because safety-critical components demand zero-defect quality. We supply Type H yokes to municipal equipment manufacturers, overhead drive system companies, and high-reliability industrial OEMs worldwide.
Fail-Safe PTO Retention for Safety-Critical Applications
Specify Type H dual-lock yokes when single-retention is not enough. Contact us for safety-critical application support.
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