Product Categories
Browse Our PTO Shaft Range
We manufacture a comprehensive range of PTO shafts and components engineered for demanding agricultural, forestry, and industrial applications. Each category represents decades of engineering refinement, rigorous quality testing, and real-world field validation across diverse operating environments.
New Arrivals
Latest PTO Shaft Products
Explore our newest additions to the product line. Each PTO shaft undergoes dynamic balancing testing, torque verification, and comprehensive quality inspection before leaving our facility in Ansan, Korea.
Engineering Breakdown
Understanding PTO Shaft Structure & Components
A PTO shaft (Power Take-Off shaft) is a precision-engineered mechanical assembly that transfers rotational power from a tractor or engine to driven implements and machinery. Understanding the anatomy of a PTO shaft helps you select the right configuration for your specific application and maintain it for maximum service life.
1. Input Yoke (Tractor-Side Connection)
The input yoke connects directly to the tractor's PTO output stub shaft. Manufactured from 40Cr alloy steel or ductile iron (QT450-10), it features precision-machined spline profiles that engage with the tractor's PTO splines. Common specifications include 1-3/8" 6-spline (540 RPM systems) and 1-3/4" 6-spline or 20-spline (1,000 RPM systems). All yokes undergo quenching and tempering heat treatment (HRC 58-62) for superior wear resistance.
Material: 40Cr Alloy Steel | Hardness: HRC 58-62 | Types: Splined, Plain Bore, Quick-Disconnect
2. Cross & Bearing Kit (Universal Joint)
The universal joint (U-joint) is the critical articulation point that allows the shaft to transmit torque at varying angles between the tractor and implement. Each U-joint consists of a precision-forged cross (spider), four bearing caps packed with needle roller bearings, grease seals, and snap ring retainers. Bearing material is GCr15 chrome steel, ensuring high fatigue life under continuous rotational loading. Standard cross kit sizes range from 22×54.8mm for light-duty applications to 39×118mm for heavy industrial implementations.
Material: GCr15 Bearing Steel | Sizes: 22×54.8 / 27×74.6 / 30.2×92 / 35×98 / 39×118mm
3. Telescoping Section (Sliding Profile)
The telescoping section enables length adjustment to accommodate varying distances between the tractor and implement during operation. It consists of an inner and outer profile tube that slide together while maintaining torque transmission capability. Profile types include Lemon (most common in agriculture), Star (higher torque capacity), Triangular (economical option), and Splined (industrial applications). Surface treatment is critical: phosphating combined with flocked nylon coating or PTFE coating reduces friction, prevents corrosion, and extends service intervals significantly.
Profiles: Lemon / Star / Triangular / Splined | Treatment: Phosphate + Flock Coat or PTFE
4. Output Yoke (Implement-Side Connection)
The output yoke connects to the driven machinery's input shaft. Like the input yoke, it is machined from 40Cr alloy steel with precision spline profiles. Depending on the application, output yokes may feature different spline configurations than the input side to match the implement manufacturer's specifications. Shear bolt hubs or quick-disconnect mechanisms may be integrated into the output yoke assembly.
Material: 40Cr Alloy Steel | Connection: Matched to implement input specification
5. Safety Shield Assembly
The safety shield is a mandatory protective guard that completely encloses the rotating PTO shaft, preventing accidental contact with the spinning components. Manufactured from impact-resistant ABS or polypropylene plastic, the shield assembly includes cone-shaped guards at each end, a tubular guard covering the telescoping section, and bearing-supported free-spinning capability so the shield remains stationary while the shaft rotates inside. Chain retention points prevent the shield from rotating with the shaft.
Material: ABS/PP Plastic | Standard: CE EN 12965 | Components: Cone + Bell + Tube + Chains
6. Torque Limiting Device (Overload Protection)
Torque limiters protect both the PTO shaft and the driven equipment from damage caused by sudden overloads, jamming, or shock loads. Multiple protection mechanisms are available: Shear Bolt Hubs use sacrificial bolts that break at a predetermined torque threshold; Friction Clutches slip at a set torque value and automatically re-engage when the overload clears; Overrunning Clutches allow the implement to freewheel when decelerating; and Ratchet Torque Limiters provide audible clicking warnings before full disengagement.
Types: Shear Bolt / Friction Clutch / Overrunning Clutch / Ratchet Limiter
Need help selecting the right PTO shaft configuration for your equipment?
Contact Our Engineers →Where Our Products Work
Industry Applications for PTO Shafts
PTO shafts serve as the essential power link between prime movers and driven machinery across a wide range of industries. Our products are engineered and tested specifically for the demanding conditions encountered in each sector, with particular emphasis on the agricultural and forestry applications prevalent across Korea and the Asia-Pacific region.
Engineering Data
PTO Shaft Technical Specifications
Our PTO shafts are available in the following standard configurations. For custom specifications, special torque ratings, non-standard spline profiles, or unique application requirements, contact our engineering team for a tailored solution.
| Parameter | Range / Options |
|---|---|
| Series | L (Light) / S (Standard) / T (Medium) / B (Heavy) / W (Extra Heavy) / SWC (Industrial) |
| Spline Specifications | 1-3/8" 6-spline, 1-3/4" 6-spline, 1-3/4" 20-spline, 1-3/8" 21-spline, Custom profiles available |
| Closed Length (Lmin) | 600mm – 2,500mm (custom lengths available) |
| Rated Torque | 150 N·m – 48,000 N·m (varies by series) |
| Max Operating Speed | 540 RPM / 1,000 RPM (standard PTO speeds) |
| Working Angle | Standard: ≤25° | Wide-Angle: ≤80° | CV: ≤80° (constant velocity) |
| Telescoping Profile Type | Lemon / Star / Triangular / Splined |
| Safety / Overload Device | Shear Bolt Hub / Friction Clutch / Overrunning Clutch / Ratchet Torque Limiter |
| Safety Shield Standard | CE Compliant Safety Guard (EN 12965) |
| Cross Kit Sizes | 22×54.8 / 27×74.6 / 30.2×92 / 35×98 / 39×118mm (and more) |
| Surface Treatment | Paint / Powder Coating / Zinc Plating / Dacromet / Hot-Dip Galvanizing |
| Yoke Material | 40Cr Alloy Steel (Quenched & Tempered) / Ductile Iron QT450-10 |
| Bearing Material | GCr15 Chrome Bearing Steel (HRC 58-62) |
Our Advantages
Why Choose Korea Ever-power
Choosing a PTO shaft supplier is a critical decision that affects your equipment's reliability, safety, and operational cost. Here is what sets Korea Ever-power apart from other manufacturers and trading companies in the market.
OEM/ODM Customization
We provide complete OEM and ODM services from initial concept design through prototyping to mass production. Our engineering team works directly with your technical staff to develop PTO shaft specifications that precisely match your application requirements, including custom yoke designs, non-standard spline profiles, specific torque limiter settings, and branded packaging. Minimum order quantities for custom specifications start at just 50 units.
ISO 9001 Quality System
Our entire manufacturing process operates under a rigorous ISO 9001:2015 quality management system. Every PTO shaft assembly undergoes a minimum of 7 quality checkpoints from raw material inspection through to final packaging. Key testing equipment includes coordinate measuring machines, torque testing rigs, Schenck dynamic balancing machines, metallographic analyzers, and Rockwell hardness testers. Our reject rate consistently remains below 0.3%.
Competitive Factory Pricing
As a direct manufacturer rather than a trading company, we eliminate intermediary markups and pass cost savings to our customers. Our integrated supply chain includes direct procurement of raw materials (40Cr steel, GCr15 bearing steel, ABS/PP plastics), in-house CNC machining, heat treatment, and assembly. This vertical integration enables us to offer prices 15-25% below comparable quality imported alternatives while maintaining strict quality standards.
Fast Lead Time & Delivery
Standard catalog products ship within 15-25 days from order confirmation. High-volume stock items for popular series (L, S, T) are available with 7-day express dispatch. We maintain strategic inventory of common cross & bearing kits, yokes, and safety shields to accelerate assembly. Urgent orders can be accommodated with priority scheduling at minimal surcharge. All shipments include comprehensive packing lists and quality certificates.
Global Logistics Network
We support multiple international trade terms including FOB, CIF, and DDP to simplify your procurement process. Our logistics team coordinates with major shipping lines and freight forwarders to ensure timely delivery to any port worldwide. For Asia-Pacific customers, our location in Ansan near Incheon Port provides particularly efficient sea freight connections. We also offer LCL (less-than-container-load) consolidation for smaller orders.
Technical Engineering Support
Our team of 15 dedicated PTO shaft engineers provides complimentary technical consultation for product selection, application engineering, and troubleshooting. Whether you need help determining the correct Series classification for your torque requirements, selecting the appropriate safety device configuration, or diagnosing premature wear patterns in existing installations, our engineers respond to all technical inquiries within 24 business hours.
Selection Assistance
PTO Shaft Selection Guide
Selecting the correct PTO shaft requires matching three critical parameters to your application. Follow these steps to identify the right product category, or contact our engineering team for personalized assistance with complex or non-standard requirements.
Select Your Application
Identify your primary industry sector: Agriculture, Forestry, Construction, Industrial, Municipal, or Marine. Each sector has specific torque profiles, operating environments, and safety requirements that influence shaft specification.
Match Power Source
Determine your tractor or engine PTO output speed: 540 RPM (standard agricultural), 1,000 RPM (high-speed), or other (industrial). This determines the spline specification and series selection for your PTO shaft assembly.
Choose Joint Type
Based on the required operating angle between tractor and implement: Standard U-Joint (≤25°) for most applications, Wide-Angle Joint (≤80°) for tight turning, or CV Joint (≤80°, constant velocity) for smooth power delivery.
Not sure which configuration is right? Our engineers provide free selection assistance for any application.
Get Free Selection Advice →Customer Feedback
What Our Partners Say
"We switched to Ever-power's Series T PTO shafts for our rotary tiller production line two years ago. The quality of the cross & bearing kits is excellent — our field failure rate dropped by over 40% compared to our previous supplier. Their engineering team helped us optimize the torque limiter settings specifically for Korean rice paddy conditions."
Kim Park-jun
Procurement Manager, DaeHan Agricultural Machinery Co. — South Korea
"Ever-power delivers consistently on time and their wide-angle PTO shafts have performed flawlessly in our baler applications. The 80° working angle capability with CV joints eliminated the vibration issues we experienced with our previous universal joint shafts. Price-to-quality ratio is outstanding for an OEM manufacturer."
Michael Thompson
Technical Director, AgriDrive Equipment Pty Ltd — Australia
"We have been importing PTO shafts from Korea Ever-power for five years now, supplying to our dealer network across Southeast Asia. Their factory produces to consistent standards, the safety shields meet CE requirements which our customers require, and their after-sales technical support is genuinely responsive."
Nguyen Le Minh
General Manager, TrungViet Import-Export Trading Co. — Vietnam
What We Offer
Services & Solutions
Beyond manufacturing standard PTO shaft assemblies, we provide comprehensive services designed to support equipment manufacturers, distributors, and end users throughout the entire product lifecycle.
OEM Manufacturing
Custom PTO shaft production to your exact specifications, including branded packaging, custom labeling, and tailored quality documentation. MOQ from 50 sets for custom configurations.
Custom Design
Our engineering team develops non-standard PTO shaft solutions for unique applications. We provide CAD drawings, FEA analysis, prototype development, and iterative testing before mass production.
Bulk Supply
Volume pricing programs for large-quantity buyers and annual contract customers. Scheduled delivery arrangements, blanket orders, and consignment stock options for major accounts.
After-Sales Support
Comprehensive warranty coverage, replacement part supply with priority dispatch, technical troubleshooting guidance, and field service recommendations. 48-hour response commitment for all support requests.
Technical Consultation
Free engineering consultation for PTO shaft selection, application analysis, installation guidance, and maintenance planning. Our engineers speak English, Korean, and Mandarin to serve our Asia-Pacific customer base effectively.
20+
Years Experience
50+
Countries Served
500K+
Units Delivered
200+
OEM Partners
15
Patents Held
Industry Knowledge
Latest Technical Articles & News
Stay informed with the latest PTO shaft technology insights, maintenance best practices, industry standards updates, and Ever-power company news. Our technical articles are written by our engineering team to help customers optimize their power transmission systems.
Operator Knowledge
PTO Shaft Maintenance & Safety Essentials
Proper maintenance and safe operating practices are essential for maximizing the service life of your PTO shaft assembly and preventing hazardous situations. PTO shaft-related incidents remain one of the leading causes of serious injury in agricultural operations worldwide. Following these guidelines will help ensure safe, reliable operation throughout the service life of your equipment.
🛠 Preventive Maintenance Schedule
Before Each Use: Visually inspect the entire PTO shaft assembly for damage, missing safety shields, loose fasteners, and excessive play in the universal joints. Check that the safety shield rotates freely on its bearings and that all chain retention points are secure. Verify that the torque limiter (shear bolts or friction clutch) is correctly set and undamaged.
Every 8 Operating Hours: Grease all universal joint cross & bearing assemblies through the grease fittings (zerk fittings) using a quality EP2 lithium-based grease. Apply grease until it purges from all four bearing seals, confirming complete lubrication. Grease the telescoping section profile surfaces if not equipped with flock coating or PTFE treatment.
Every 50 Operating Hours: Inspect universal joint bearing caps for signs of wear, scoring, or heat discoloration. Check telescoping section for excessive radial play (more than 1mm indicates wear requiring replacement). Verify that all spline connections are tight and free of excessive backlash. Inspect safety shield for cracks, deformation, or UV degradation.
Annual Overhaul: Disassemble and inspect all cross & bearing kits for needle roller condition and seal integrity. Replace any bearings showing pitting, spalling, or reduced rotation smoothness. Inspect yoke bores for elongation or spline wear. Replace safety shield components showing signs of fatigue, cracking, or deformation.
⚠ Critical Safety Guidelines
Never Operate Without Safety Shields: The safety shield is a legally required protective device in most markets. Operating a PTO shaft without properly installed and functioning safety guards exposes operators and bystanders to extreme risk of entanglement with the rotating shaft. Entanglement incidents with unguarded PTO shafts are frequently fatal. Always ensure both cone guards, the tube guard, and all chain retention points are in place and undamaged before engaging the PTO.
Disengage PTO Before Approaching: Always disengage the tractor PTO, turn off the engine, and wait for complete shaft rotation to stop before approaching the PTO shaft area for any reason — including clearing blockages, adjusting implements, greasing, or visual inspection. PTO shafts operating at 540 RPM complete 9 rotations per second; at 1,000 RPM, this increases to nearly 17 rotations per second.
Wear Appropriate Clothing: Loose clothing, jewelry, long hair, and dangling straps present severe entanglement hazards near rotating PTO shafts. Operators should wear close-fitting clothing without loose ends, tie back long hair, and remove all jewelry before operating PTO-driven equipment.
Correct PTO Shaft Length: Ensure the PTO shaft is correctly sized for the tractor-implement combination. An overly compressed shaft can cause the telescoping profiles to bottom out and transfer end-thrust loads to the universal joints, leading to rapid bearing failure. An overly extended shaft reduces profile overlap below the safe minimum (typically one-third of the profile length), risking separation under load.
🔍 Common PTO Shaft Failure Indicators & Diagnosis
Vibration During Operation
Possible Causes: Worn universal joint bearings, damaged or missing bearing cap snap rings, bent shaft tube, excessive operating angle exceeding joint rating, or imbalanced shaft assembly. Persistent vibration accelerates wear on all components and should be investigated promptly. Check U-joint bearings first — they are the most common vibration source.
Clicking or Knocking Noise
Possible Causes: Worn spline connections with excessive backlash, worn cross & bearing kit with internal clearance, or a damaged friction clutch with irregular engagement. Clicking that varies with shaft rotation typically indicates U-joint wear. Knocking during torque application points to spline wear in the telescoping section or yoke connections.
Premature Bearing Failure
Possible Causes: Insufficient or incorrect grease type, contamination from water or soil ingress through damaged seals, operating angle exceeding the rated maximum for the joint type, or overloading beyond the rated torque capacity. For wet-field applications (such as rice paddy operations in Korea), upgraded triple-lip seal configurations significantly extend bearing life.
Global Reach
Worldwide Export & Logistics
From our manufacturing base in Ansan-si, South Korea, we deliver PTO shaft products to customers across every inhabited continent. Our proximity to Incheon Port — one of Asia's busiest container ports — provides efficient sea freight connections to all major global shipping routes, enabling competitive transit times to destinations worldwide.
🇯🇵 & 🇰🇷 Asia-Pacific (Primary Market)
Korea, Japan, Australia, New Zealand, Thailand, Vietnam, Indonesia, Philippines, Malaysia, Cambodia, Myanmar, India. Sea freight transit 3-12 days from Incheon. Our largest market region with dedicated Korean-language customer support, localized safety documentation, and KST-based response windows. Korean customers benefit from domestic courier delivery for small component orders.
🇪🇺 Europe
Germany, France, Italy, Spain, Poland, Netherlands, UK, Scandinavia, Eastern Europe. Sea freight transit 25-35 days. All products supplied with CE safety certification and EN 12965 compliance documentation as standard. EU customers receive GDPR-compliant data handling throughout the procurement and support process.
🇺🇸 & 🇨🇦 Americas
United States, Canada, Brazil, Argentina, Mexico, Chile, Colombia. Sea freight transit 15-25 days to west coast, 25-35 days to east coast. Competitive pricing against North American and European PTO shaft brands with equivalent quality specifications. ASAE/SAE standard spline profiles available for direct compatibility with North American equipment.
🌎 Africa & Middle East
South Africa, Kenya, Nigeria, Ethiopia, Egypt, Tanzania, Morocco, Saudi Arabia, UAE. Sea freight transit 20-40 days. Durable surface treatment options (Dacromet, hot-dip galvanizing) recommended for harsh climate environments. Agricultural development project supply experience with documentation meeting international donor agency procurement standards.
