{"id":1829,"date":"2026-04-21T09:48:04","date_gmt":"2026-04-21T09:48:04","guid":{"rendered":"https:\/\/agricultural-gearbox.net\/?post_type=product&p=1829"},"modified":"2026-04-21T09:48:04","modified_gmt":"2026-04-21T09:48:04","slug":"ep03-agriculture-gearbox-for-hay-tedder","status":"publish","type":"product","link":"https:\/\/agricultural-gearbox.net\/pt\/product\/ep03-agriculture-gearbox-for-hay-tedder\/","title":{"rendered":"EP03 Agriculture Gearbox For Hay Tedder"},"content":{"rendered":"
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EP03 Agriculture Gearbox For Hay Tedder<\/h1>\n

SKU: EP03 \u00a0|\u00a0 Category: Hay Tedder Gearbox \u00a0|\u00a0 Agricultural Gearbox \u00a0|\u00a0 PTO Drive Systems<\/p>\n

Ratio 2.63:1 \u00a0|\u00a0 Input 400 RPM \u00a0|\u00a0 Output 363 N\u00b7m \u00a0|\u00a0 6 kW \/ 8.1 HP Input Power<\/p>\n<\/div>\n<\/div>\n

1. Technical Specifications \u2014 EP03 Hay Tedder Gearbox<\/h2>\n

The following 20 parameters define the engineering baseline of the EP03 under standard operating conditions. Application-specific data and custom configuration specifications are available upon request from the technical team.<\/p>\n

\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
#<\/th>\nParameter<\/th>\nValor \/ Especifica\u00e7\u00e3o<\/th>\n<\/tr>\n<\/thead>\n
1<\/td>\nModel Number<\/td>\nEP03<\/td>\n<\/tr>\n
2<\/td>\nProduct Type<\/td>\nAgriculture Gearbox for Hay Tedder<\/td>\n<\/tr>\n
3<\/td>\nTransmission Ratio<\/td>\n2.63:1<\/td>\n<\/tr>\n
4<\/td>\nRated Input Speed<\/td>\n400 RPM<\/td>\n<\/tr>\n
5<\/td>\nMaximum Input Power<\/td>\n6 kW \/ 8.1 HP<\/td>\n<\/tr>\n
6<\/td>\nRated Output Torque<\/td>\n363 N\u00b7m<\/td>\n<\/tr>\n
7<\/td>\nOutput Flange Type<\/td>\nB-Type \u2014 \u00d8112.5 (\u00d8115.5)<\/td>\n<\/tr>\n
8<\/td>\nMaterial de Constru\u00e7\u00e3o<\/td>\nHigh-Strength Cast Iron HT250<\/td>\n<\/tr>\n
9<\/td>\nGear & Shaft Material<\/td>\nA\u00e7o Liga 20CrMnTi<\/td>\n<\/tr>\n
10<\/td>\nTratamento de Superf\u00edcie de Engrenagens<\/td>\nGas Carburizing + Quenching + CNC Profile Grinding<\/td>\n<\/tr>\n
11<\/td>\nGear Surface Hardness<\/td>\n58 \u2013 62 HRC<\/td>\n<\/tr>\n
12<\/td>\nTipo de Rolamento<\/td>\nTapered Roller Bearing, ISO 355<\/td>\n<\/tr>\n
13<\/td>\nSistema de Lubrifica\u00e7\u00e3o<\/td>\nSplash Lubrication \u2014 ISO VG 220 Gear Oil<\/td>\n<\/tr>\n
14<\/td>\nTipo de Selo<\/td>\nNitrile Rubber (NBR) Shaft Seals<\/td>\n<\/tr>\n
15<\/td>\nSealing \/ Protection Rating<\/td>\nIP54<\/td>\n<\/tr>\n
16<\/td>\nFaixa de temperatura operacional<\/td>\n-15\u00b0C to +75\u00b0C<\/td>\n<\/tr>\n
17<\/td>\nNoise Level (Full Load)<\/td>\n\u2264 70 dB(A)<\/td>\n<\/tr>\n
18<\/td>\nTransmission Efficiency<\/td>\n\u2265 94%<\/td>\n<\/tr>\n
19<\/td>\nDesign Service Life (Main Parts)<\/td>\n\u2265 20,000 hours<\/td>\n<\/tr>\n
20<\/td>\nOverall Dimensions (L \u00d7 W \u00d7 H)<\/td>\n240 \u00d7 185 \u00d7 160 mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

* Reference values under standard test conditions. Custom specifications available on enquiry.<\/em><\/p>\n

\"agricultural-gearbox-products-EP03<\/p>\n

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2. Five Key Advantages of the EP03 Hay Tedder Gearbox<\/h2>\n

When evaluating Hay Tedder Gearbox<\/strong> options for implement procurement or OEM assembly, the EP03 stands apart in five specific areas that determine real-world performance and long-term ownership cost.<\/p>\n

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1. Purpose-Matched 2.63:1 Ratio for Hay Tedder Drum Dynamics<\/h3>\n

The transmission ratio of a Hay Tedder Gearbox<\/strong> is not a generic parameter \u2014 it must match the specific angular velocity requirements of the tedder rotor to produce the correct tine tip speed for effective crop lifting without excessive soil disturbance or crop damage. The EP03’s 2.63:1 ratio is calibrated for 400 RPM PTO input, producing an output shaft speed that gives single-rotor hay tedders the rotational range needed to achieve thorough, consistent windrow inversion across varying crop densities. This means cleaner, faster drying of cut forage rather than the uneven drying and crop quality losses that result from mismatched drive ratios \u2014 a detail that matters for Brazilian dairy and beef operators selling silage or hay bales at quality-differentiated prices.<\/p>\n<\/div>\n

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2. High Output Torque \u2014 363 N\u00b7m at Rated Operating Conditions<\/h3>\n

Output torque of 363 N\u00b7m ensures the EP03 maintains consistent drum rotation even during passage through dense, heavy windrows of thick-stemmed crops like Tifton 85 bermudagrass or multi-cut ryegrass \u2014 conditions that regularly appear in southern Brazil’s intensive hay production areas. Many lower-specification gearbox alternatives in this torque class struggle to maintain steady output under peak load, leading to speed variation at the rotor and uneven tedding passes. The EP03’s rated torque headroom, combined with its carburized and ground internal gear components, sustains stable power delivery throughout the rotor without the slip, vibration, or noise increase that indicates gear fatigue in lesser assemblies. For commercial haymakers running long daily operating shifts, this stability is directly reflected in consistent bale density and forage quality.<\/p>\n<\/div>\n

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3. Compact, Field-Serviceable Housing Design<\/h3>\n

Agricultural gearboxes that require specialist workshop equipment for bearing and seal changes create real operational risk during haymaking season, when weather windows are narrow and delays are costly. The EP03 housing is designed with this reality in mind: standard metric fasteners throughout, clearly accessible drain and fill ports, and a housing geometry that allows bearing inspection and replacement with tools available in a typical farm workshop. The B-type output flange conforms to the \u00d8112.5 (\u00d8115.5) mounting pattern, which is compatible with the majority of commercial single-rotor hay tedder frames from European and South American manufacturers. This dimensional standardization means the EP03 functions as a direct hay tedder gearbox replacement<\/strong> across a wide range of existing machine frames without modification to the mounting structure.<\/p>\n<\/div>\n

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4. Long Service Life Through Hardened Gear Components<\/h3>\n

Main gear and shaft components in the EP03 are manufactured from chromium-manganese-titanium case-hardening steel (20CrMnTi), processed through gas carburizing, quenching, and CNC profile grinding to achieve 58\u201362 HRC surface hardness on all active tooth faces. The sub-surface core is retained at a lower hardness (approximately 35\u201340 HRC) to absorb impact loads from sudden load changes during tedding without brittle fracture propagation. Under correctly maintained lubrication conditions, the primary structural components of the EP03 are rated for a service life exceeding 20,000 operating hours \u2014 a figure that substantially exceeds what seasonal agricultural use places on the gearbox across its working life. For buyers evaluating hay tedder gearbox quality<\/strong>, this longevity translates directly to a lower total cost per season of operation.<\/p>\n<\/div>\n

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5. Custom OEM Manufacturing \u2014 Small Batches Accepted<\/h3>\n

For implement manufacturers developing new tedder models or rebuilding existing production lines around updated specifications, the EP03 platform supports full custom production against client-supplied engineering drawings or sample gearboxes. Modified input shaft diameters, alternative keyway dimensions, non-standard flange bolt circle patterns, and custom paint or coating specifications can all be accommodated. Minimum order quantities for standard units are competitive with established hay tedder gearbox manufacturers<\/strong> in the market, and the in-house tooling capability means that engineering changes can be prototyped and validated quickly \u2014 an important consideration for OEM customers managing product introduction timelines. Documentation in Portuguese is available on request for Brazilian import and CE declaration requirements.<\/p>\n<\/div>\n<\/div>\n

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3. Hay Tedder Gearbox Working Principle<\/h2>\n

Understanding the Hay Tedder Gearbox working principle<\/strong> begins at the tractor’s PTO output shaft. When the tractor PTO is engaged \u2014 at the standard agricultural speed of 540 RPM for most tractors, or in the case of the EP03 at the implement-specific input speed of 400 RPM \u2014 the PTO shaft delivers rotational power through a universal-jointed drive shaft to the gearbox input. The input shaft of the EP03 receives this rotation and transmits it to the internal gear set, which consists of precision-ground bevel and helical gears arranged to change the rotation axis orientation (from horizontal\/longitudinal to transverse) and multiply the torque while reducing speed according to the 2.63:1 reduction ratio.<\/p>\n

Inside the gearbox housing, the gear train operates in a continuous oil bath of ISO VG 220 gear lubricant, which provides hydrodynamic film separation between gear tooth surfaces during mesh and between bearing inner and outer races during rotation. This splash lubrication approach \u2014 where gear rotation continuously lifts oil from the sump and distributes it across the gear faces and bearing races \u2014 requires no external pump, no active oil circulation system, and no electrical components. It is inherently robust and maintenance-friendly, which is why it remains the standard approach for agricultural gearboxes operating in environments where maintaining complex auxiliary systems is impractical.<\/p>\n

The output shaft exits the housing at the B-type flange mounting face and connects to the hay tedder’s rotor drive \u2014 driving the central drum shaft or the rotor arm carrier plate that spins the tine arms. As the rotor turns, the curved steel tines trace a cycloid path relative to the ground, gently lifting cut crop from below and projecting it in an arc to spread it across a wider area or invert the windrow. The quality of this motion \u2014 smooth, consistent, and at the right tip speed for the crop type \u2014 depends on the gearbox maintaining a steady output rotational speed under varying torque demand. The EP03’s robust gear geometry and bearing arrangement support exactly this kind of load-stable output.<\/p>\n

This is the fundamental answer to the question what is Hay Tedder Gearbox<\/em> function: it is the mechanical interface that makes the tractor’s PTO output useful for a specific implement task, translating raw rotational power into the precise speed and torque profile that efficient hay tedding requires. When the gearbox is correctly matched to the machine and properly maintained, the entire tedding process \u2014 and therefore the quality of the dried forage crop \u2014 proceeds as intended.<\/p>\n<\/div>\n

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4. Material Composition<\/h2>\n

The EP03’s material selection reflects the straightforward but demanding requirements of an agricultural field gearbox: it must withstand sustained rotational loads, intermittent shock inputs, outdoor temperature cycling, and seasonal exposure to moisture and crop debris \u2014 all while remaining repairable with standard workshop tools and commercially available replacement parts. Every material choice in the EP03 traces back to these operational realities rather than cost reduction or nominal specification compliance.<\/p>\n

The outer housing is cast from HT250 grey cast iron, a grade used extensively in agricultural gearbox manufacturing for its combination of high compressive strength, effective vibration damping, and excellent dimensional stability following controlled cooling from the casting process. The pearlitic matrix of HT250 also provides inherent lubricity at bearing bore surfaces, reducing the risk of fretting wear between the housing and outer bearing races during the vibration-rich operation typical of tine-carrying rotary implement drives. Precision bores for bearing seats are machined in a single setup to maintain concentricity and squareness, ensuring correct bearing geometry and minimizing shaft deflection under load.<\/p>\n

Internal gears and shafts are produced from 20CrMnTi alloy steel \u2014 the standard case-hardening grade for Chinese and internationally exported agricultural machinery gearboxes, favored for its combination of deep hardenability, fine grain size, and resistance to impact fracture at sub-zero temperatures. Following rough turning and gear hobbing, components are loaded into controlled atmosphere furnaces for gas carburizing at temperatures around 930\u00b0C, building a carbon-enriched surface layer 0.8 to 1.2 mm deep. Quenching arrests the microstructure with surface hardness at 58\u201362 HRC and a retained tough core at approximately 35\u201340 HRC. Final gear tooth geometry is achieved by CNC profile grinding, which corrects any distortion from the heat treatment cycle and holds tooth form within ISO 6336 accuracy requirements. Tapered roller bearings throughout the assembly comply with ISO 355 dimensional standards, ensuring interchangeability with bearings available from distributors across Brazil and globally.<\/p>\n<\/div>\n

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5. Application Scenarios<\/h2>\n

The EP03 Agricultural Hay Tedder Gearbox<\/strong> serves a range of haymaking and forage management applications where PTO-driven rotary equipment must deliver consistent power transmission across full-season field operations.<\/p>\n

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Single-Rotor Hay Tedders \u2014 Dairy & Beef Farm Haymaking<\/h3>\n

The EP03’s primary application is as the drive gearbox for single-rotor hay tedders on dairy and beef cattle farms in southern Brazil \u2014 particularly in Rio Grande do Sul, Santa Catarina, and Paran\u00e1, where cool-season grasses like ryegrass, oats, and azev\u00e9m are cut and dried for silage bales or dry hay storage. The 2.63:1 ratio is well-matched to the drum speed requirements of standard single-rotor tedder frames in the 2.0 to 3.5-meter working width range. Reliable, vibration-free operation through the gearbox is essential for these operators, who often work narrow weather windows between rainfall events during the haymaking season.<\/p>\n<\/div>\n

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Tifton 85 & Brachiaria Pasture Haymaking \u2014 Beef Feedlot Supply<\/h3>\n

Brazil’s expanding beef feedlot sector in the Cerrado and transition zones of Mato Grosso do Sul, Goi\u00e1s, and Minas Gerais uses large volumes of high-quality hay \u2014 particularly Tifton 85 bermudagrass and Brachiaria hay \u2014 for dry-season supplemental feeding. Tedding these coarser, higher-density tropical grasses places greater continuous torque demands on the gearbox than cool-season grass tedding, and the EP03’s 363 N\u00b7m output torque rating provides adequate headroom for sustained operation through dense windrows without the overheating or premature bearing wear that occurs when underpowered hay tedder gearbox parts<\/strong> are used in high-density tropical pasture hay work.<\/p>\n<\/div>\n

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Implement OEM Assembly \u2014 Hay Tedder Manufacturing<\/h3>\n

Agricultural implement manufacturers building hay tedder machines for domestic Brazilian sale or export to neighboring South American markets \u2014 Argentina, Uruguay, Paraguay \u2014 use the EP03 as an OEM component in their tedder drive assemblies. The B-type output flange (\u00d8112.5\/\u00d8115.5) conforms to the mounting pattern used by the majority of single-rotor tedder arm carriers, simplifying integration without custom adapter plates. Support for custom engineering modifications and small production batch manufacturing makes the EP03 particularly practical for smaller OEM workshops producing regional implement variants designed for specific South American terrain and crop type combinations.<\/p>\n<\/div>\n

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Hay Tedder Fleet Maintenance \u2014 Farm Workshop Replacement Parts<\/h3>\n

Farm machinery workshops servicing a fleet of hay tedders across a large property or for a contracting operation need a reliable source of hay tedder gearbox replacement<\/strong> units that fit standard frame dimensions without lengthy lead times or complex import procedures. The EP03’s dimensional compatibility with common tedder frame mounting configurations \u2014 combined with acceptance of small order quantities and inventory availability for prompt shipment \u2014 makes it well-suited to the farm workshop replacement parts market. Experienced workshop mechanics familiar with how to use Hay Tedder Gearbox<\/strong> assemblies during seasonal rebuilds will find the EP03 consistent with standard installation practices and tolerances.<\/p>\n<\/div>\n

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Forage Cooperative & Agricultural Services Contractors<\/h3>\n

Agricultural service contractors in Brazil’s hay-producing regions operate tedders on a commercial hire basis, working across multiple properties during the brief weather windows available for haymaking. Their machines accumulate operating hours rapidly \u2014 sometimes reaching 300 to 500 hours in a single season \u2014 placing sustained mechanical demands on the gearbox that go well beyond what farm-owned equipment typically experiences. The EP03’s rated service life and robust internal construction support this high-utilization operational profile. The availability of a defined hay tedder gearbox kit<\/strong> of consumable parts \u2014 seals, bearings, oil \u2014 enables cooperative maintenance coordinators to carry a standardized service kit for all tedders in the fleet rather than managing diverse part numbers across multiple gearbox brands.<\/p>\n<\/div>\n<\/div>\n<\/div>\n

\"agricultural-gearbox-products-EP03<\/div>\n
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6. Regulatory & Compliance Framework by Region<\/h2>\n

Agricultural gearbox components and the hay tedder machines they power are governed by machinery safety, product liability, and environmental regulations in all major markets. Buyers, importers, and OEM manufacturers have compliance obligations that vary by destination country and should be factored into component procurement decisions.<\/p>\n

Brazil \u2014 MAPA, ABNT & INMETRO<\/h3>\n

In Brazil, agricultural machinery \u2014 including hay tedders and their drive assemblies \u2014 falls under the regulatory scope of the Minist\u00e9rio da Agricultura, Pecu\u00e1ria e Abastecimento (MAPA) and is subject to technical standards from the Associa\u00e7\u00e3o Brasileira de Normas T\u00e9cnicas (ABNT). ABNT NBR ISO 11684 governs safety signs and hazard marking requirements on agricultural machinery; ABNT NBR 14990 covers general safety requirements for field equipment. Commercial imports of agricultural machinery sub-assemblies through registered importers may require INMETRO conformity documentation. All technical documentation, installation manuals, and safety information for machines sold commercially in Brazil must be available in Portuguese. Buyers sourcing a hay tedder gearbox for sale<\/strong> from overseas suppliers should request a Brazilian Portuguese technical manual and a conformity declaration covering ABNT standards as part of the standard delivery documentation.<\/p>\n

European Union \u2014 CE Marking & Machinery Directive<\/h3>\n

Agricultural machinery and sub-assemblies placed on EU markets must comply with the Machinery Directive 2006\/42\/EC \u2014 and from January 2027, with EU Machinery Regulation 2023\/1230 \u2014 which requires a risk assessment, Declaration of Incorporation for partly completed machinery, and a Technical File. ISO 11684 (safety signs), ISO 4254-1 (agricultural machinery general safety), and EN ISO 4413 (fluid power safety where hydraulic-assist systems are present) are among the harmonized standards applicable to hay tedder drive systems. CE-marked gearbox assemblies must be supplied with a Declaration of Conformity, and the technical file must be maintained for a minimum of ten years after the last unit is placed on market.<\/p>\n

United States \u2014 ASABE Standards & OSHA<\/h3>\n

In the United States, the American Society of Agricultural and Biological Engineers (ASABE) publishes voluntary engineering standards that are widely referenced by equipment manufacturers and insurers, including ASABE S318 on agricultural machinery terminology and EP496 on safety for PTO-driven implements. OSHA 29 CFR 1910 regulations on power transmission equipment safety apply to commercial agricultural operations. Importers and distributors of hay tedder gearbox components in the US should confirm compliance with applicable ASABE standards and obtain appropriate product liability documentation from the manufacturer as part of their supply agreement.<\/p>\n

Australia & New Zealand<\/h3>\n

Agricultural machinery in Australia operates under the AS 4024 Safeguarding of Machinery series and Safe Work Australia codes governing powered equipment used in primary production. In New Zealand, the Health and Safety at Work Act 2015 and associated WorkSafe New Zealand guidance apply. PTO-driven machinery safety requirements \u2014 including guarding specifications and power transmission safety standards \u2014 are particularly relevant for hay tedder operators in both markets. Gearbox components imported for machinery use in Australia should carry materials certification and dimensional data conforming to AS\/NZS frameworks used by local OEM builders.<\/p>\n

ISO International Standards<\/h3>\n

Globally, ISO 4254-7 (safety of self-propelled and non-self-propelled agricultural machinery \u2014 hay and forage equipment), ISO 6336 (gear load capacity calculations), ISO 9409-1 (mounting flanges), and ISO 11684 (safety signs) collectively establish the international design and documentation baseline for agricultural gearboxes. Products developed against these standards support multi-market regulatory compliance and facilitate technical communication between buyers and suppliers regardless of geographic location. The EP03 is designed to align with these international standards, making it suitable for both domestic Brazilian deployment and export to regulated markets.<\/p>\n<\/div>\n

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7. About Our Manufacturing Capability<\/h2>\n

We are a specialized manufacturer of agricultural power transmission components with production capabilities spanning the full range of gearbox types used in field implement applications \u2014 including Hay Tedder Gearbox<\/strong> assemblies, bevel gearboxes, worm gearboxes, and PTO shaft accessories. Our production plant operates CNC turning and milling centers, gear hobbing machines, CNC profile grinding equipment, controlled-atmosphere heat treatment furnaces, and coordinate measuring machines that together ensure consistent dimensional accuracy and gear geometry quality across production batches of any size.<\/p>\n<\/div>\n

WorkShop<\/h3>\n
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\"Hay
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\n\"Agricultural<\/div>\n<\/div>\n
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8. Related Products & One-Stop Agricultural Drive Supply<\/h2>\n

A complete, well-integrated agricultural drivetrain requires more than a correctly specified gearbox. PTO shafts, chains, and sprockets must all be dimensionally and dynamically compatible with the gearbox they connect to \u2014 and sourcing them from a single supplier with full-system knowledge eliminates the interface compatibility guesswork that arises when parts come from multiple uncoordinated vendors. We manufacture and supply a complete range of agricultural power transmission accessories fully compatible with the EP03 Hay Tedder Gearbox<\/strong>. Explore our full range at agricultural-gearbox.net<\/a>.<\/p>\n

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PTO Shafts for Hay Tedder Drives<\/h3>\n

PTO shafts for agricultural machinery are subject to the combined stresses of torque transmission, angular misalignment, and telescopic length variation as the tractor and implement move over undulating ground. Our telescopic PTO shafts with safety guard tubes are manufactured to 1 3\/8″ 6-spline and 1 3\/8″ 21-spline profiles at both 540 and 1,000 RPM speed ratings, with universal joints rated to the torque levels required by the EP03 input. Compatible cross-kit sizes are available as separate service items, ensuring operators can replace worn universal joint crosses without replacing the full shaft.<\/p>\n

\"PTO<\/p>\n<\/div>\n

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Drive Chains & Sprockets for Secondary Transmission<\/h3>\n

Secondary chain drives from the EP03 output shaft to tine arm carriers or cam plates in hay tedder assemblies require matched roller chain and sprocket sets where pitch accuracy and tooth form are consistent between chain and sprocket manufacturer. Our agricultural drive chains in ANSI 40, 50, and 60 series pitches are manufactured from case-hardened alloy steel with corrosion-resistant surface treatments, and our precision-machined sprockets in corresponding pitches are held to ISO 606 dimensional tolerances. Using a matched chain and sprocket set from a single supply source eliminates the accelerated pitch-line wear that develops when chain elongation characteristics and sprocket tooth geometry are not designed to work together. Full system compatibility with the EP03 is confirmed for standard chain drive ratios used in single-rotor tedder designs.<\/p>\n

\"Agricultural<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
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Frequently Asked Questions<\/h2>\n
\nQ1. What is a Hay Tedder Gearbox and what role does it play in hay drying efficiency on farm?<\/summary>\n
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A Hay Tedder Gearbox<\/strong> is the power transmission assembly that connects the tractor’s PTO output shaft to the rotating tine drum of a hay tedder machine. It converts the PTO shaft’s rotational speed and torque into the specific output speed and torque profile required to drive the tedder rotor at the correct velocity for lifting, aerating, and spreading cut grass or legume crop across the field. Efficient hay drying depends on complete and consistent crop aeration \u2014 and that process is only possible when the gearbox delivers smooth, steady power to the drum throughout the tedding pass. A gearbox that slips, vibrates, or drops speed under load produces uneven tedding, which results in longer drying times, moisture inconsistency in the bale, and higher risk of forage quality losses from delayed harvest.<\/p>\n<\/div>\n<\/details>\n

\nQ2. How do I install a hay tedder gearbox correctly to avoid premature bearing failure in the field?<\/summary>\n
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Correct installation is the single most important factor in achieving the design service life of a Hay Tedder Gearbox<\/strong>. Begin by cleaning and degreasing all mating surfaces on the implement frame and the gearbox mounting flange. Verify that the input shaft axis is aligned within the angular tolerance of the PTO drive shaft’s universal joints \u2014 misalignment that exceeds the joint’s designed operating angle creates cyclic bending loads on the input shaft bearing that accelerate fatigue failure. Torque all mounting bolts to the specified value using a calibrated torque wrench. Fill the gearbox with ISO VG 220 gear oil to the dipstick or sight glass mark before the first run. Run the gearbox at reduced load for 15 to 20 minutes before applying full operational load, allowing the bearing races and gear contacts to lap in correctly. Check for oil leakage around all shaft seals after the break-in run and re-torque mounting fasteners if any relaxation is observed.<\/p>\n<\/div>\n<\/details>\n

\nQ3. Which hay tedder gearbox parts should I stock as spares before the haymaking season starts in Brazil?<\/summary>\n
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For a single EP03 unit, a practical pre-season spare parts kit should include: one set of input and output shaft oil seals (NBR, correct bore diameter), the two tapered roller bearing assemblies fitted to the input shaft, a 2-liter can of ISO VG 220 gear oil for the oil change at 500 hours, and a set of mounting flange fasteners at the correct grade. For a fleet of tedders, holding one complete spare gearbox unit alongside the consumable kit is the most effective strategy \u2014 it allows an immediate swap-out during harvest rather than a bench repair under time pressure. The most common hay tedder gearbox parts<\/strong> that require replacement in routine service are the shaft seals (which degrade from UV exposure and heat cycling) and the input shaft bearing (which is the most heavily loaded element in the assembly during PTO-coupled operation).<\/p>\n<\/div>\n<\/details>\n

\nQ4. When should I choose hay tedder gearbox replacement over a seal and bearing repair on my existing unit?<\/summary>\n
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Hay tedder gearbox replacement<\/strong> is the correct decision when: the housing has visible casting cracks or elongated bearing bore seats; gear tooth contact surfaces show advanced pitting or spalling affecting more than 20\u201325% of the tooth face width; output shaft runout exceeds 0.06 mm TIR after bearing replacement; or the unit is well beyond its rated service life and operating in a high-utilization contracting context. For units still within service life hours showing only seal and bearing wear, targeted component replacement is cost-effective and keeps the original housing in service. The borderline case \u2014 where housing bore wear has allowed bearing outer race fretting \u2014 typically requires housing replacement, which in most cases makes a complete unit replacement more economical than re-boring and sleeving the original housing.<\/p>\n<\/div>\n<\/details>\n

\nQ5. What are the advantages and disadvantages of using a hay tedder gearbox versus a belt-driven tedder system in commercial haymaking?<\/summary>\n
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Hay Tedder Gearbox advantages<\/strong> over belt-driven systems include: higher efficiency power transmission (typically 94\u201396% for a well-maintained gear drive versus 90\u201393% for a V-belt drive), elimination of belt slip under peak torque loads, longer maintenance intervals, and better performance consistency over temperature extremes where belt tension changes with thermal expansion. The primary disadvantage of a gear-drive system is higher initial component cost compared to a simple V-belt and sheave assembly, and the need for oil level monitoring and periodic oil changes that belt drives do not require. For commercial haymaking operations where machine utilization is high and weather windows are short, the reliability and efficiency advantages of the Agricultural Hay Tedder Gearbox<\/strong> typically outweigh the higher upfront investment and lubrication maintenance requirement.<\/p>\n<\/div>\n<\/details>\n

\nQ6. How do hay tedder gearbox effects on crop quality change when the wrong transmission ratio is used for the crop type?<\/summary>\n
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Hay Tedder Gearbox effects<\/strong> on forage quality are most visible when the rotor tine tip speed is mismatched to the crop. A gear ratio that produces too high a tine speed for a fine, short-stemmed crop like ryegrass causes excessive crop throw, leaf shatter, and loss of high-nutrient leaf material from the windrow \u2014 directly reducing the protein content and digestibility of the resulting hay. Too low a tine speed in dense, heavy-stemmed material like Tifton hay or mature oat straw results in insufficient windrow inversion, leaving the lower layer of the windrow in contact with moist soil for extended periods and raising the risk of fungal spoilage. The EP03’s 2.63:1 ratio at 400 RPM PTO input is matched to achieve the correct tip speed range for the crop types and operating conditions typical in southern Brazil, where dual-purpose hay and pasture operations require a reliable, repeatable tedding action season after season.<\/p>\n<\/div>\n<\/details>\n<\/div>\n<\/div>\n

Editor: PXY<\/p>","protected":false},"excerpt":{"rendered":"

The EP03 Agriculture Gearbox For Hay Tedder is a purpose-built power transmission assembly designed for use in rotary hay tedder machines operating in conjunction with agricultural tractors. Its primary function is to receive rotational power from the tractor’s Power Take-Off (PTO) shaft and redirect it \u2014 at the correct speed ratio and torque level \u2014 to the tedder’s rotating drum and tine assembly, which lifts, aerates, and redistributes cut grass or legume material across the field windrow.<\/p>\n

The EP03 operates at a fixed transmission ratio of 2.63:1, accepting a standard PTO input speed of 400 RPM and delivering the appropriate output torque and rotational speed to the drum mechanism. At rated input, the gearbox handles up to 6 kW (8.1 HP) of continuous input power with an output torque of 363 N\u00b7m \u2014 sufficient for single-rotor tedder configurations operating across the range of grass and hay crops typical in Brazil’s southern cattle farming regions, including ryegrass, oat straw, and Brachiaria pasture haymaking. The unit is compact, robust, and designed for the physical realities of field operation: vibration, crop material ingress, rain exposure, and the accumulated dirt of a full haymaking season.<\/p>","protected":false},"featured_media":1830,"comment_status":"open","ping_status":"closed","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[2334],"product_tag":[],"class_list":{"0":"post-1829","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-hay-tedder-gearbox","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/agricultural-gearbox.net\/pt\/wp-json\/wp\/v2\/product\/1829","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/agricultural-gearbox.net\/pt\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/agricultural-gearbox.net\/pt\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/agricultural-gearbox.net\/pt\/wp-json\/wp\/v2\/comments?post=1829"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/agricultural-gearbox.net\/pt\/wp-json\/wp\/v2\/media\/1830"}],"wp:attachment":[{"href":"https:\/\/agricultural-gearbox.net\/pt\/wp-json\/wp\/v2\/media?parent=1829"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/agricultural-gearbox.net\/pt\/wp-json\/wp\/v2\/product_brand?post=1829"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/agricultural-gearbox.net\/pt\/wp-json\/wp\/v2\/product_cat?post=1829"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/agricultural-gearbox.net\/pt\/wp-json\/wp\/v2\/product_tag?post=1829"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}