EP-TV290H Round Baler Gearbox Replacement of Comer Code
The EP-TV290H Round Baler Gearbox is a robust replacement unit designed to match Comer specifications, ensuring seamless integration into agricultural machinery. It features a precise 2.07:1 gear ratio, converting a standard 540 rpm input into efficient power transmission capable of handling 51.5 kW. The gearbox delivers a substantial output torque of 1828 Nm, making it ideal for heavy-duty baling operations. It is equipped with a 1″ 3/8 Z6 spline input shaft (Shaft Z) and a 39*40 output shaft (Shaft X), guaranteeing compatibility with standard PTO drivelines. Engineered for durability and high performance in demanding field conditions, the EP-TV290H offers reliable power transfer and extended service life for round balers.
Industrial-Grade Agricultural Transmission
EP-TV290H Round Baler Gearbox
Replacement of Comer Code | Ratio 2.07 | 540 RPM | 51.5 kW | 1828 Nm Output
Technical Specifications — EP-TV290H
All values below are drawn from the engineering drawing and specification sheet for the EP-TV290H. The dimensional data confirms the unit's compatibility with Comer-code baler configurations operating on 540 RPM standard tractor PTO systems.
| พารามิเตอร์ | ค่า/คุณสมบัติ |
|---|---|
| Gear Ratio (i) | 2.07 |
| Input Speed N₁ | 540 รอบต่อนาที |
| Input Power P₁ | 51.5 kW |
| Output Torque M₂ | 1828 Nm |
| Shaft X (Output) — Spline Profile | 39×40 (39 teeth, Ø40 mm nominal) |
| Shaft X — Output Stub Diameter | Φ99 mm (h7 tolerance) |
| Shaft X — Stub Length | L100 mm (beyond flange face) |
| Flange Offset (X shaft side) | 30 mm from housing face |
| Shaft Z (Input) — Spline Profile | 1" 3/8 Z6 (SAE standard) |
| Overall Length (Z to X end) | 786 mm (111 mm + 675 mm) |
| ความกว้างของที่อยู่อาศัย | 222 mm |
| Housing Total Height | 317 mm (112 mm upper + 205 mm lower) |
| Housing Body Height | 158 mm |
| Upper Mounting Bolts | N.4×M12, pitch 120 mm |
| Lower Input Flange Bolts | N.4×M12, Φ120 mm bolt circle |
| Compatibility | Replacement of Comer Code, 540 RPM round baler and harvester applications |
What Is the EP-TV290H Round Baler Gearbox?
เดอะ EP-TV290H round baler gearbox is a purpose-engineered replacement for Comer-coded round baler drivetrains, specified around a gear ratio of 2.07 with a 540 RPM PTO input and a rated input power of 51.5 kW. Where this unit differs noticeably from other round baler gearbox types in the same series is its output shaft configuration: the primary output shaft (Shaft X) exits the gearbox housing on a Φ99 mm diameter to h7 tolerance, with a stub length of 100 mm protruding from the output flange face. This geometry suits round baler designs where the gearbox output drives directly into a hub or belt-drive sheave rather than through a secondary driveshaft coupling — a layout particularly common on older Comer-code machines used throughout Western Europe, Canada, and Australia. The 39×40 spline on Shaft X (39 teeth, nominal Ø40 mm) provides a high tooth-count profile that distributes torque across a wider contact area than coarser spline families, which matters when the gearbox is carrying a continuous 1828 Nm output torque through sustained baling cycles.
From an installation standpoint, the EP-TV290H fits the original Comer code machine envelope without structural modification. The housing maintains the original chassis footprint — 222 mm wide, 317 mm total height (112 mm upper + 205 mm lower) — and uses standard mounting patterns: four M12 bolts on the upper bracket with a 120 mm pitch and four M12 bolts on a Φ120 mm lower flange register. These are the dimensions that determine whether a round baler gearbox replacement drops in cleanly or requires bracket adaptation, and the EP-TV290H satisfies both criteria without compromise.
Round Baler Gearbox Working Principle
Power enters through Shaft Z, positioned at the lower end of the gearbox housing and fitted with a 1" 3/8 Z6 spline — the standard SAE-profile coupling used on virtually all 540 RPM agricultural PTO systems globally. This orientation places the input shaft in line with the tractor PTO driveline, and the round baler pto shaft runs from the tractor output through to Shaft Z without directional change. Inside the cast housing, the input torque engages a helical gear mesh configured to produce a 2.07 step-up ratio, rotating Shaft X faster than the input while multiplying torque to 1828 Nm at the output. The 2.07 ratio is a characteristic figure for round baler gearbox equipment designed to drive belt-dominated bale chambers, where the chamber peripheral speed must be held above a minimum threshold to maintain crop flow and bale density.
The output Shaft X emerges axially from the front face of the gearbox, extending 100 mm beyond the flange surface at a diameter of Φ99 mm (h7 tolerance). The h7 fit grade is significant: it specifies a shaft that can accept a close-clearance hub — such as a belt sheave or sprocket — without measurable backlash in the radial direction, which keeps the belt drive geometry stable under load reversal events like bale ejection and belt-wrap tightening at the start of a new bale cycle. Understanding this round baler gearbox working principle helps maintenance technicians identify the source of belt flutter or vibration: if the sheave-to-shaft fit degrades over time, the symptom appears at the belt rather than the gearbox itself, making shaft-fit measurement the correct first diagnostic step.
The internal gear geometry and housing bore alignment are produced to tolerances consistent with DIN quality standards for agricultural power transmission gearboxes. Bearing preload is set at the factory and is not field-adjustable, ensuring consistent axial shaft positioning across the full production batch. This design choice reflects the operating reality of round baler gearbox for tractor use: field technicians replacing a unit between baling shifts cannot be expected to carry precision measuring equipment, so the gearbox must arrive ready to bolt in and run.
Five Key Performance Advantages
① High-Torque Output at 540 RPM — 1828 Nm
At a standard 540 RPM PTO input, the EP-TV290H delivers 1828 Nm of output torque — a figure that covers the full bale-forming load range of mid-size to large-capacity round balers used in hay, straw, and silage operations across North America, Europe, and Australasia. This torque level is particularly relevant during the final compression phase of bale formation when chamber pressure peaks, a moment that places transient loads well above average on the gearbox output shaft. Having genuine torque reserve at that moment is what separates durable round baler gearbox equipment from units that run hot and wear prematurely in sustained field use.
② Φ99 h7 Output Shaft for Close-Clearance Hub Fitment
The primary output shaft exits at Φ99 mm to h7 tolerance — a precision fit grade that accommodates interference or close-clearance hubs without axial play or fretting corrosion at the hub bore. This is the shaft configuration that round baler designs using direct belt-sheave drives require, and it is a dimensional detail that distinguishes this round baler gearbox type from output-splined variants. The 100 mm stub length provides adequate hub seating depth for both standard and oversized sheave profiles, and the 30 mm flange offset prevents hub-to-housing contact under full shaft loading.
③ 39×40 Spline — High Tooth Count for Load Distribution
The 39-tooth spline on Shaft X uses a fine-pitch profile that spreads torque across a larger number of contact flanks than the coarser 6- or 21-tooth profiles found on some agricultural PTO shafts. In practice, this translates to lower contact stress per tooth — a meaningful advantage in applications where the gearbox output torque fluctuates sharply with crop density changes as the pick-up encounters heavy windrow patches. Fatigue life on splined connections scales strongly with tooth contact pressure, making the 39×40 profile a sound engineering choice for the continuous-duty environment that a round baler gearbox for tractor use must endure across a full baling season.
④ Compact Mounting Footprint — Four-Bolt Upper and Lower Pattern
The EP-TV290H uses a straightforward 4×M12 upper bracket mount (120 mm pitch) and a 4×M12 lower input flange (Φ120 mm bolt circle), keeping the mounting hardware simple and universally available. This matters in field-service contexts where a contractor in Western Australia or rural Saskatchewan needs to replace a round baler gearbox parts set using fasteners from a standard workshop stock — not a specialty bolt that requires a dealer order. The four-point mount also provides adequate clamping force to resist the torsional reaction loads the housing experiences when the input PTO shaft torque reverses direction during crop slug events.
⑤ Verified Comer Code Dimensional Match
As a Round Baler Gearbox Replacement of Comer Code, the EP-TV290H reproduces the original mounting dimensions, shaft stub geometry, and housing envelope of the Comer-code specification it replaces. When comparing round baler gearbox options, the critical differentiator is not the gear ratio alone but whether the complete envelope — including shaft position relative to mounting faces — matches the original. The EP-TV290H satisfies this requirement across all three axes of the housing geometry, which is why it can be described as a round baler gearbox best practice replacement rather than an approximation requiring field adaptation.
Construction Materials and Quality Framework
The housing of the EP-TV290H is produced from ductile iron (GGG50 / QT500-7), a material selected for its combination of high yield strength — typically 300–350 MPa — and the crack-arrest behaviour that spheroidal graphite provides at stress concentration points around bearing seats and bolt boss transitions. Compared to grey cast iron, ductile iron absorbs impact energy rather than propagating cracks, which is a practical advantage in round baler gearbox equipment where housing wall loads fluctuate with every bale-compression cycle. The housing is stress-relieved after casting and before machining, which removes residual casting stresses that would otherwise cause dimensional creep in the bore registers over time.
Gear blanks are forged from 20CrMnTi or 42CrMo4 alloy steel, carburized to a case depth of 0.8–1.2 mm, and quench-hardened to achieve a tooth surface hardness of 58–62 HRC. The core hardness is maintained at 30–40 HRC to provide the impact toughness the tooth root requires when shock loads enter the mesh during crop slug events at the pick-up. Gear tooth profiles are hobbed to DIN 7 or better, with critical baler gearboxes ground to DIN 6 on the helical stages to reduce transmission error — the source of the low-frequency noise that can appear in PTO-driven equipment at certain input speeds.
Bearings at the Shaft X output position are selected for combined radial and axial load capacity, reflecting the off-axis forces that belt drives impose through the output hub. The lip seals on Shaft X and Shaft Z are double-lip polymer seals with integrated spring-loaded primary lips and a separate dust exclusion lip — a seal specification developed for agricultural environments where chaff, grit, and moisture are present simultaneously. The gearbox leaves the production line filled with EP 90 gear oil, run-in at rated speed on a test stand, and inspected for oil temperature rise and vibration signature before being approved for shipment.
สถานการณ์การใช้งาน
The EP-TV290H round baler gearbox for tractor-driven equipment covers a range of agricultural harvesting and biomass collection tasks. The 2.07 ratio and 1828 Nm output torque place this unit firmly in the medium-to-large round baler category, where crop throughput and bale chamber loading consistently demand more than entry-level gearboxes can sustain.
Grass and Legume Silage Baling — Northern Europe
In the Netherlands, Germany, and Ireland — where silage cutting cycles run four to five times annually — a round baler gearbox must sustain continuous high-density baling in wet, high-density grass swards. The EP-TV290H's 51.5 kW rating and 1828 Nm torque give it the capacity to handle these conditions without running at thermal limit, keeping oil operating temperatures within the service range of standard SAE 90 EP gear oil even during consecutive full-day baling shifts. This makes it one of the more suitable round baler gearbox for sale options for professional contracting businesses in high-intensity grass farming regions.
Direct Belt-Sheave Driven Bale Chamber Systems
Some round baler architectures — particularly those derived from older Comer-code designs — drive the main bale chamber roller directly from the gearbox output stub shaft via a flat or V-belt sheave. The EP-TV290H's Φ99 h7 output stub is dimensioned for exactly this connection type. The 100 mm stub length accommodates single or dual-groove sheaves, and the h7 tolerance ensures the sheave hub seats without measurable runout — critical for maintaining belt tracking and even belt-load distribution across the bale chamber width. This round baler gearbox type is the appropriate choice specifically when the original machine design calls for a stub-shaft output rather than an output spline.
Grain Straw and Crop Residue Recovery — Australia and Canada
Post-harvest straw baling in Australian wheat regions and Canadian Prairie provinces involves high daily bale counts across large, open paddocks. Field accessibility for roadside service is limited, meaning the round baler gearbox must complete a full harvest season without unscheduled servicing — a requirement the EP-TV290H addresses through its factory run-in test protocol and sealed bearing specification. Buyers evaluating round baler gearbox comparison between catalogue-sourced units and directly procured replacements consistently note that the availability of production test documentation from an ISO 9001:2015 certified facility is the deciding factor in fleet procurement decisions for these geographically remote agricultural regions.
Round Baler and Harvester Integration — South America
In Brazil and Colombia, where sugarcane trash, sorghum, and high-moisture tropical grasses are increasingly baled for livestock feed and biogas feedstock, the mechanical demands on Round Baler Gearbox for Round Baler and Harvester systems are substantially higher than temperate-climate norms. The dense, fibrous structure of tropical crop residues generates sustained high torque at the bale chamber drive, and the ambient temperatures that characterise these operating environments accelerate gear oil oxidation. The EP-TV290H's oil fill specification and thermal headroom make it a practical and field-proven choice for these markets, particularly in operations running 65–100 HP tractors across extended daily shifts in the South American harvest season.
Related Products — Integrated Drivetrain Supply
The EP-TV290H does not operate in isolation — it is part of a complete baler drivetrain system. We produce the full range of mechanical components that connect the tractor PTO to the bale chamber, which means customers can source a matched, system-verified assembly rather than combining parts from multiple suppliers with differing tolerance standards and quality systems.
Round Baler PTO Shaft — Input-Side Driveline
เดอะ เพลา PTO ของเครื่องอัดฟางทรงกลม couples the tractor output to Shaft Z of the EP-TV290H. Our PTO shaft assemblies for this application carry the 1" 3/8 Z6 spline on both ends, with telescoping tube lengths to accommodate the range of tractor-to-baler hitch distances encountered across different machine generations. Overrunning clutch protection is integrated to prevent inertia backdriving of the gearbox during bale ejection, and the driveshaft guards meet ISO 4254-1 safety requirements for PTO-driven agricultural machinery across all target export markets.
Complete Round Baler Machine Systems
For buyers outfitting new baling operations rather than simply replacing worn round baler gearbox parts, we supply complete round baler systems with all drivetrain components — including the EP-TV290H round baler gearbox — specified and tested as an integrated assembly. This approach eliminates the compatibility uncertainty that arises when gearboxes, PTO shafts, and bale chamber drives are sourced from separate suppliers. How to use round baler gearbox components correctly from day one is a question best answered by sourcing the complete system from one technical point of contact, where the mechanical interfaces have been verified together rather than assumed to be interchangeable.
Our Manufacturing Background
The engineering team behind the EP-TV290H brings more than ten years of applied experience in mechanical power transmission for agricultural and industrial equipment. That experience is not theoretical — it comes from working directly on the specification, testing, and field problem-solving of agricultural gearboxes across multiple product lines and export markets. Our current catalogue covers agricultural gearboxes, worm gear reducers, planetary gear drives, power take-off shafts, hydraulic cylinders, gears, chains, and motors, all produced within a single integrated facility operating under ISO 9001:2015 certification.
The range of materials we process reflects the breadth of what we manufacture: ductile iron for most agricultural gearbox housings, grey cast iron for lower-duty enclosures, cast steel and precision cast steel for load-critical structural components, and cast aluminium for weight-sensitive applications. Beyond these standard materials, we handle full machining of gears, sprockets, worm sets, pulleys, shafts, and special-purpose mechanical assemblies — both catalogue items and engineered-to-order designs produced against customer drawings and application requirements. This breadth of in-house production capability is what allows us to describe ourselves as a round baler gearbox manufacturers source rather than a component trading operation.
Quality documentation — ISO certificates, material mill reports, dimensional inspection records from CMM measurement, and run-in test certificates — is maintained as a standard part of our production management system and is available to buyers on request. For fleet procurement, this documentation supports incoming inspection programmes and provides the audit trail that professional agricultural equipment procurement increasingly demands.
เวิร์กช็อป
Order and Delivery Terms
Minimum Order Quantity
As a high-value drive product, MOQ for the EP-TV290H is assessed on configuration and total order value rather than a fixed unit count. Orders of 1–2 units are accepted for replacement and trial purposes. Mixed orders combining this unit with other round baler gearbox models or PTO shaft assemblies are supported when the combined order reaches approximately USD 1,500.
ระยะเวลานำส่ง
Standard production units: 20–45 วันทำการ from confirmed order. Sample quantities of 1–5 units can typically be ready within 7–25 working days. Units with non-standard shaft modifications, special surface treatments, or alternate gear ratios are individually evaluated — contact us with your specific requirements for a confirmed delivery commitment.
Trade Terms
Standard incoterms: EXW, FOB, CIF, and DAP. FCA, CFR, CPT, CIP, and DDP can be arranged for specific shipment requirements. Urgent single-unit replacements during the harvest window can be dispatched on DDP courier terms upon request, ensuring the fastest possible delivery to operational farms in Europe, Australasia, and the Americas.
Samples and Trial Orders
New buyers may order 1–5 sample units before committing to a production quantity. All sample units are fully assembled, run-in tested, and production-equivalent — there are no simplified or prototype-grade units in our sample programme. Please provide the original Comer code part number or existing gearbox dimensional record when placing a sample enquiry to allow accurate cross-referencing before dispatch.
คำถามที่พบบ่อย
What is an EP-TV290H round baler gearbox and how does it differ from a standard gearbox used on smaller hay balers in the UK and Ireland?
The EP-TV290H is a medium-to-large round baler gearbox specifically designed for Comer-code machines running on 540 RPM PTO drives, producing 1828 Nm of output torque at a 2.07 gear ratio. Compared to gearboxes designed for smaller hay balers — typically rated below 1000 Nm and built around much lighter-duty housings — the EP-TV290H uses a ductile iron housing, carburized alloy steel gears, and factory run-in testing as standard. Smaller baler gearboxes in the UK and Ireland market are often grey iron castings without the housing stress-relief process, which means they are more susceptible to bore distortion and bearing-seat cracking under the sustained loads of a professional baling operation.
How do I know which round baler gearbox replacement is right for my Comer-coded baler when the machine manual only shows the original part number and not the full shaft specification?
If the machine manual only carries the Comer code part number, the practical route is to measure the existing unit directly: record the input shaft spline profile, output shaft diameter, overall housing dimensions, and mounting bolt pattern. For the EP-TV290H, the key identifiers are: input 1" 3/8 Z6 spline (Shaft Z, lower position), output Φ99 mm stub (Shaft X, front face), 4×M12 upper bracket mount at 120 mm pitch, and 4×M12 lower flange at Φ120 mm bolt circle. Matching all four characteristics — not just the ratio — is what makes a round baler gearbox replacement a true drop-in rather than an adaptation job.
How many HP does it take to run a round baler fitted with a 2.07 ratio gearbox when baling dense ryegrass silage in New Zealand hill country farms?
A 2.07 ratio round baler gearbox rated at 51.5 kW corresponds to approximately 70 HP at the tractor PTO under continuous duty. For dense ryegrass silage in New Zealand hill country — where moisture content can exceed 65% and windrow weights are high — adding a 25–30% working margin above the rated figure is a practical recommendation, suggesting 90–100 HP as a realistic operating minimum. Tractors running on steep gradients also lose effective drawbar HP to slope resistance, so hill country operations with slopes above 10° should size upward further to maintain consistent bale chamber filling rate without PTO slippage events.
Which round baler gearbox type should I choose when my baler uses a stub-shaft output hub rather than an output spline for the main belt drive in a Scandinavian dairy farming operation?
For baler designs that drive the main belt sheave directly from a stub-shaft output rather than through a splined coupling, the EP-TV290H is the appropriate round baler gearbox type. Its Φ99 h7 output stub and 100 mm engagement length are specifically dimensioned for this architecture. Scandinavian dairy operations typically run high-throughput grass silage baling with moisture-heavy crops that demand sustained torque at the chamber drive — conditions where the EP-TV290H's 1828 Nm rated output and sealed bearing specification provide meaningful advantages over lighter-duty alternatives available in the Scandinavian agricultural supply market.
Where can large-scale arable farms in Colombia and Brazil source certified round baler gearbox parts with documented quality records and reliable international shipping for tropical crop baling operations?
Direct procurement from an ISO 9001:2015 certified manufacturing facility — bypassing regional distributors who carry limited stock — is typically the most reliable route for tropical-region sourcing. We supply to South American buyers on FOB, CIF, and DAP incoterms, with production lead times of 20–45 working days for standard EP-TV290H units.
บรรณาธิการ: PXY
