شفت EP-PTO برای دستگاه پرس رول کرون | شفت PTO دستگاه پرس رول
The EP-PTO Shaft for Krone Round Balers is a heavy-duty driveline engineered for reliable power transfer in demanding baling applications. It features a standard 1.375-6 spline input and a Constant-Velocity (CV) joint design to ensure smooth operation and reduce wear. The shaft is equipped with integrated overload protection, available as an FT friction clutch (1000-1800 Nm) or a K64/2 cutout clutch, to safeguard your equipment. Constructed from precision-forged alloy steel yokes and cold-drawn seamless tubes, it is built for durability and includes a full-length safety guard compliant with ISO 4254-1. This PTO shaft is designed to fit a wide range of Krone models, from the KR series to the large 1500 and 1800 series.
EP-PTO Shaft for Krone Round Balers
Your trusted source for a heavy-duty round baler pto shaft — engineered to deliver reliable power transfer between your tractor and Krone baling equipment season after season.
Specification Reference
| Krone Model | PTO Type / Spline | Protection / Clutch |
|---|---|---|
| KR100 / 125 / 155 / 130 / 160 | Size 4 Standard ×1210 ×1.375-6 Size 4 CV ×1210 ×1.375-6 |
FT34 ×1.375-6 ×1000 Nm |
| 1500 / 1800 | Size 4 or Size 6 CV with 1.375-6 | FT32 @ 1000 Nm or FT42 @ 1450 Nm |
| 1500V / 1250 MC | 2380 or 2480 CV with 1.375-6 | K64/2 Cutout @ 1050 Nm or 1500 Nm ×1.375-6 |
| 1250 / 1550 | Size 4 (CAT3) CV with 1.375-6 | FT32 or FF1 @ 1000 Nm |
| 1250 / 1500 | Size 6 CV (CAT4) | FT42 @ 1450 Nm |
Note: Krone round balers are equipped with either a friction clutch or a cutout clutch depending on model year and region. Always verify your baler's serial number plate before finalising a round baler PTO shaft for sale order to ensure you receive the correct round baler pto shaft.
Constant-Velocity PTO — Base Part Numbers
| Constant Velocity PTO | Tractor Spline | Base Part Number (add implement device) |
|---|---|---|
| CAT3 / 540 | 1.375-6 | 71R4121UCW07000 |
| CAT4 / 540 | 1.375-6 | 71R6121UCW07000 |
FT Clutches for 1.375-6 Spline Input — Baler Input Requirements
| Universal Size | Torque Rating | Part Number |
|---|---|---|
| CAT3 / S4 | 1000 Nm | 6QE344901R |
| CAT3 / S4 | 1000 Nm | 635E41203R |
| CAT4 / S6 | 1800 Nm | 663H53403R |
Material Composition and Construction Quality
Durability in a pto drive shaft comes directly from material selection and heat-treatment discipline. Here is how we approach each major component in the EP Krone round baler pto shaft assembly to ensure a high-performing round baler pto shaft:
Yokes
Precision-forged 20CrMnTi or equivalent alloy steel, carburised and hardened to 58–62 HRC at the spline contact surfaces. The forged grain structure resists fatigue cracking far better than cast alternatives for a pto shaft.
Telescoping Tubes
Cold-drawn seamless steel tube (GB/T 8162 or equivalent EN 10210), profiled in a lemon or star cross-section for superior torque transmission at reduced wall thickness. Outer surfaces are coated with epoxy primer plus polyurethane topcoat for corrosion resistance on every pto shaft.
Cross Kits
The four-point needle-roller bearing cross — the heart of every universal joint for PTO shaft — is manufactured from 20CrMo bearing steel, induction-hardened, ground and lapped. Pre-greased with lithium-complex grease; nipple grease fittings allow field re-lubrication for the pto shaft.
Safety Guard
High-density polyethylene (HDPE) co-rotating guard in safety orange, UV-stabilised for outdoor exposure. Quick-release retaining chains and end-caps comply with ISO 4254-1 guarding geometry requirements and are standard on every shipped pto shaft unit.
Friction Clutch Plates
Sintered bronze friction pads with spring-steel backing plates. Torque slip threshold is set and tested on a calibrated torque rig at the factory. Replacement friction disc kits are available separately, making field maintenance straightforward without replacing the entire PTO driveline shaft or the entire round baler pto shaft.
What Is a PTO Shaft and Why Does It Matter for Round Balers?
A PTO shaft — short for power take-off shaft — is the mechanical link that transfers rotational power from a tractor's gearbox output to an attached implement. In the context of round baling, the round baler pto shaft must handle high continuous torque loads, absorb vibration during pick-up roller engagement, and tolerate angular misalignment as the baler follows uneven ground contours. Without a correctly specified pto driveshaft, even a premium Krone baler cannot operate at its design capacity. This is why having the right pto shaft is critical.
Krone round balers — spanning the KR series fixed-chamber machines through the large variable-chamber 1500 and 1800 series — each demand a particular combination of spline interface, constant-velocity joint geometry, torque rating, and overrun protection clutch for their round baler pto shaft. Our EP-PTO Shaft for Round Baler for Krone Round Balers is purpose-matched to these requirements. It uses a 1.375-6 spline input (the global agricultural standard), a constant-velocity (CV) joint to accommodate angular displacement, and either an FT friction clutch or a K64/2 cutout clutch depending on the baler model — exactly the specifications Krone engineers designed these machines around when they specified the original round baler pto shaft.
Our tractor PTO drive shaft assemblies and pto shaft units are built from precision-forged alloy steel yokes, cold-drawn seamless tubes, and sealed needle-roller cross kits, then protected by a full-length plastic guard with quick-release clips. Every round baler pto shaft passes dimensional and torque-verification checks before dispatch, reflecting more than a decade of mechanical manufacturing experience behind each pto shaft we ship globally.
Five Key Advantages of Our PTO Shaft
Constant-Velocity Joint Design
The CV joint at both ends of the round baler pto shaft allows up to 80° of steering/terrain deflection without fluctuating output speed, protecting the baler pickup and flywheel from torque spikes that would otherwise cause premature wear on the pto shaft u joint and bearing sets of the round baler pto shaft.
Precision 1.375-6 Spline Interface
The 1.375-inch, 6-spline connection is the recognised standard for 540 PTO shaft output on tractors from 40 hp upward. Our machined spline yokes maintain tight tolerances, eliminating rattle and fretting corrosion — a frequent cause of needing a round baler pto shaft replacement in field use.
Integrated Overload Protection Clutch
Depending on model, either an FT friction clutch (rated 1000 Nm or 1450 Nm) or K64/2 cutout clutch is factory-fitted to the round baler pto shaft. These safeguard both the tractor gearbox and baler input shaft during sudden blockages — meeting the overload-protection requirements found in EU Machinery Directive 2006/42/EC and widely referenced by North American ASABE standards for a pto shaft.
Telescoping Tube for Adjustable Length
The cold-drawn steel telescoping pto shaft accommodates hitch depth variations between different tractor models without requiring a separate pto shaft adapter. The overlap profile is pre-greased and corrosion-inhibited, so length adjustment of the pto shaft stays smooth even after a full season without servicing.
Full-Length Safety Guard Included
Every pto shaft assembly ships with a CE-compliant co-rotating plastic guard and quick-release retaining clips. This is not an accessory but a standard component of the pto shaft — reflecting the requirements of ISO 4254-1 (agricultural machinery general safety) and the UK PSSR / PUWER regulations that mandate guarding of rotating driveline components on farm equipment.
How a Round Baler PTO Shaft Works
Understanding how does a pto shaft work helps in selecting the right unit and diagnosing field problems quickly with your round baler pto shaft. The tractor PTO shaft stub at the rear of the tractor rotates at either 540 rpm (for tractors below approximately 65 hp) or 1000 rpm (for larger tractors). The female spline yoke at the tractor end of the round baler pto shaft slides over this stub and is secured by a spring-loaded collar.
Rotational energy passes through the tractor-end yoke of the round baler pto shaft, into the cross-and-bearing kit (the classic four-point universal joint), through the telescoping tube, and out through a second universal joint — or on CV-equipped shafts, through a double-cardan constant-velocity joint — into the implement-end yoke. On Krone round balers, this implement yoke of the round baler pto shaft connects to the baler's main input gearbox. From there, the baler's internal drivetrain distributes power to the pickup rotor, the bale-forming rollers or belt system, and the net/twine wrapping mechanism.
The overload clutch sits at the implement end of the pto shaft. When crop blockage or a foreign object causes a sudden torque spike above the clutch's rated threshold, the clutch slips or trips out, absorbing the shock load before it can fracture the pto shaft components, break the baler's input shaft, or stall the tractor. On Krone machines, friction clutches are standard on many models; some higher-capacity variants use the K64/2 cutout design, which requires manual re-engagement after tripping. Knowing your baler's specification is therefore the first step in choosing the right pto shaft for baler applications and selecting the perfect pto shaft.
Application Scenarios
Our PTO Shaft for Round Baler is engineered to perform across a wide range of field conditions and crop types.
Grass and Hay Baling
The most common use case across Europe, North America, and Australia. Freshly cut grass or dried hay imposes steady torque on the round baler pto shaft. The CV joint on our round baler pto shaft maintains smooth power delivery even when the baler tracks behind the tractor on hillside headlands, reducing belt slip and uneven bale density.
Straw Baling After Combine Harvest
Cereal straw presents intermittent density variations as windrow volume fluctuates. The friction clutch rated at 1000 Nm to 1800 Nm protects the tractor pto driveshaft when the pickup rotor encounters bunched or tangled material, a critical feature particularly valued in UK, Canadian, and Eastern European grain-growing regions when using a pto shaft.
Silage Pre-Crop Baling
High-moisture silage crops generate elevated torque and require a robust pto drive shaft with adequate overlap in the telescoping section. Our PTO shafts for round balers's sealed needle-roller cross kits resist the corrosive conditions that wet silage creates, extending service intervals for the round baler pto shaft in demanding dairy and beef farming operations across Ireland, New Zealand, and Scandinavia.
Industrial Hemp and Biomass
Emerging crop categories like industrial hemp, corn stalks, and dedicated energy biomass place extreme demands on the custom pto driveshaft assembly due to high fibre length and stem rigidity. The CAT4/S6 configuration with 1800 Nm clutch rating is the recommended specification for these high-load applications, requiring a very tough round baler pto shaft, particularly in German and Dutch bioenergy markets.
Installation Guide
Fitting a round baler pto shaft replacement correctly is as important as selecting the right specification. Follow these steps to ensure a safe, properly functioning installation of your new PTO shaft for round baler:
Measure the Required Length
With the tractor hitched to the baler at normal working distance, measure the distance from the tractor PTO stub face to the baler input flange face. The compressed round baler pto shaft length should not fall below 1/3 of the total extended length. Refer to how to measure a PTO shaft guidelines from your baler manual to verify minimum overlap in the telescoping section of the baler pto shaft.
Shorten If Required
If the stock length of the round baler pto shaft is too long for a close-coupled hitch, use a pipe cutter or angle grinder to trim both tubes equally. When learning how to shorten a PTO shaft, always cut equal lengths from each half of the pto shaft so the yoke-to-yoke phasing stays aligned (parallel yoke ears). Deburr cut ends with a file and re-apply corrosion inhibitor before reassembly.
Connect and Lock Both Ends
Slide the tractor-end yoke of the round baler pto shaft fully onto the tractor PTO shaft stub until the spring-loaded locking collar clicks into the groove. On the baler end, engage the female yoke of the round baler pto shaft with the input stub and secure with the retaining pin or quick-release lock specific to the Krone input shaft diameter. Never start the tractor with either end of the baler pto shaft unlocked.
Attach Guard Retaining Chains
Fix the guard retaining chains to both the tractor drawbar bracket and the baler input housing bracket. This prevents the guard from co-rotating with the baler pto shaft in the event that the bearing at either guard end seizes. Confirm the guard rotates freely relative to the pto shaft before engaging PTO.
Set Round Baler PTO Speed
Engage PTO at low engine throttle and verify round baler PTO speed matches Krone's specified 540 rpm input for the pto shaft. Increase engine speed gradually. Krone's manual specifies operating PTO speed; running significantly below rated speed reduces bale density while over-speed risks damaging the baler's internal drivetrain and the round baler pto shaft itself. Check for pto shaft vibration before entering field operation.
How Do I Know What PTO Shaft I Need?
Answering the question "How do I know what PTO shaft I need?" requires checking four parameters to ensure you get the right round baler pto shaft: (1) the tractor PTO output speed (540 or 1000 rpm), (2) the spline count and diameter on the tractor stub (1.375-6 is standard for most mid-size tractors), (3) the required torque capacity to match your round baler PTO requirements, and (4) the operating length range of the baler pto shaft when hitched at minimum and maximum distances. For Krone balers, the CAT3/S4 pto shaft combination covers most KR-series machines at 1000 Nm, while the CAT4/S6 option suits the larger 1500 and 1800 series at 1450 Nm to 1800 Nm. Verifying your baler's input shaft size and clutch type (friction or cutout) against the tables above will narrow the selection to a single correct round baler pto shaft configuration.
A useful secondary check before buying a round baler pto shaft is what PTO hp a round baler needs. Krone's mid-range balers typically call for 50–80 hp tractors at 540 PTO, while the large variable-chamber models can absorb up to 130 PTO hp during heavy crop conditions. Your baler pto shaft torque rating should comfortably exceed the peak torque your tractor can deliver at the PTO stub to ensure the clutch — not the baler pto shaft — acts as the first line of overload protection.
About Our Manufacturing Operation
With more than ten years of hands-on mechanical engineering experience behind us, we operate a dedicated manufacturing facility focused on power transmission and agricultural driveline components, including every pto shaft we build. Our ISO 9001:2015 certified quality management system governs every stage of production, from raw material incoming inspection through to final dimensional verification and torque testing before each pto shaft assembly or round baler pto shaft leaves the floor.
Our product range spans agricultural gearboxes, worm gear reducers, planetary gear drives, power take-off shafts, baler pto shaft products, hydraulic cylinders, gears, roller chains, and electric motors. Beyond standard catalogue items like a typical round baler pto shaft, we design and produce a broad selection of industrial and agricultural gearbox assemblies using ductile iron, cast iron, cast steel, precision cast steel, and cast aluminium housings. We also manufacture gears, sprockets, worm gears, pulleys, worm shafts, and both standard and non-standard mechanical parts to customer drawings — making us a capable source for custom PTO driveshaft assemblies, custom round baler pto shaft configurations, or unique spline interface configurations that fall outside catalogue ranges.
Workshop
Related Products — Complete Your Driveline
A round baler pto shaft performs best when paired with compatible upstream and downstream driveline components.
گیربکس کشاورزی
Our full range of agricultural gearboxes covers baler, mower, tedder, and spreader applications. Matched to the same spline standards as our round baler pto shaft products, these gearboxes eliminate interface compatibility guesswork and simplify procurement for dealers and fleet operators. System compatibility and one-stop supply are our core advantages.
Universal Joint
Replacement and upgrade universal joints for agricultural PTO drivelines and round baler pto shaft systems. Our u joint for pto shaft range covers standard agricultural cross kit sizes used in Krone, John Deere, New Holland, and CLAAS applications. All cross kits ship pre-greased with grease nipples fitted, ready for direct installation or cross-kit rebuild into existing yokes on your pto shaft.
Frequently Asked Questions
Q1. Which round baler pto shaft is compatible with a Krone 1500 baler paired with a New Holland tractor in the UK?
For the Krone 1500 fitted with a 1.375-6 spline input, you need either a Size 4 or Size 6 CV round baler pto shaft depending on your power requirement. The FT32 friction clutch rated at 1000 Nm suits most New Holland 100–130 hp models at 540 PTO speed.
Q2. How do I measure a round baler pto shaft correctly when ordering a replacement for my Krone round baler in Australia?
Hitch your tractor to the baler at the working distance you normally operate. Measure from the tractor PTO stub face to the baler input flange face — this is your required centre-to-centre length in the extended position for your new round baler pto shaft. You also need to verify the compressed length leaves at least one-third of the tube overlap engaged on the pto shaft. Record both measurements and the spline count on your tractor stub (typically 1.375-6 for standard Australian farm tractors).
Q3. What PTO horsepower does a Krone round baler actually need when baling heavy silage in Ireland or Northern Europe, and how does that affect the round baler pto shaft?
Krone's mid-range fixed-chamber models such as the KR155 typically operate effectively from around 50 PTO hp, while the large variable-chamber 1500 series in high-yield silage grass can absorb 100–130 PTO hp during peak bale-formation cycles, transferring that load through the round baler pto shaft. For silage applications specifically, we recommend the higher-rated clutch option on your pto shaft — FT42 at 1450 Nm or the CAT4/S6 at 1800 Nm — because moisture-heavy crops generate significantly more resistance than dry straw.
Q4. How does a round baler pto shaft constant-velocity joint work differently from a standard universal joint on farm equipment?
A standard single universal joint on a round baler pto shaft introduces velocity fluctuation — the output shaft speeds up and slows down twice per revolution whenever operating at any angle other than zero degrees. On a round baler, this causes vibration and accelerated wear on the pickup rotor bearings. A constant-velocity (CV) joint on a pto shaft pairs two universal joints at a specific phasing angle so their speed variations cancel each other out, delivering smooth, consistent output speed at operating angles up to 80 degrees. This is why the pto driveshaft on Krone balers calls for CV specification rather than a basic single-joint arrangement on the baler pto shaft — it directly affects bale density uniformity and bearing service life across the entire implement drivetrain when using a baler pto shaft.
Editor: PXY
