EP-T-290HD Round Baler Gearbox Replacement of Comer Code
O EP-T-290HD round baler gearbox is an engineered heavy-duty replacement for Comer-coded units, designed specifically for round baler and harvester drivetrains that operate under demanding crop loads and extended daily cycles. What sets this unit apart from lighter-duty equivalents is its dual gear ratio capability: the transmission operates at either 1.63 or 3.0, with corresponding input speeds of 540 RPM and 1000 RPM, giving operators flexibility across a wide range of tractor PTO configurations. At the 540 RPM setting, the gearbox delivers up to 78 kW of input power, while the 1000 RPM mode handles 58 kW — both figures well above what most mid-size to large round balers actually demand in typical hay, straw, or silage applications. The result is a unit with genuine thermal and mechanical headroom, reducing the risk of premature failure during sustained high-throughput baling operations in markets including Australia, Canada, the Netherlands, Brazil, and South Korea.
As a round baler gearbox replacement for the Comer code specification, the EP-T-290HD is produced to match original flange registers, shaft positions, and bolt patterns, which means it installs without modification to the host machine’s chassis or driveline brackets. This compatibility is confirmed for round balers using splined input and output shafts in the 40×2×18 and 1″ 3/8 Z6 configuration families — making it a practical choice for agricultural service workshops maintaining a diverse fleet of baling equipment across multiple brands and model years.
Heavy-Duty Agricultural Transmission
EP-T-290HD Round Baler Gearbox
Replacement of Comer Code | Dual Ratio 1.63/3.0 | 540/1000 RPM | Up to 78 kW
Technical Specifications — EP-T-290HD
The following parameter table reflects the full specification of the EP-T-290HD heavy-duty round baler gearbox. Dimensional values are taken directly from the engineering drawing; performance values correspond to the two operating modes defined by the dual-ratio gear set.
| Parametre | Mode A (540 RPM) | Mode B (1000 RPM) |
|---|---|---|
| Gear Ratio (i) | 1.63 | 3.0 |
| Input Speed N₁ | 540 RPM | 1000 RPM |
| Input Power P₁ | 78 kW | 58 kW |
| Output Torque M₂ | 2180 Nm | 1694 Nm |
| Shaft X (Output) | 40×2×18 involute spline | |
| Shaft Y (Output) | 40×2×18 involute spline | |
| Shaft Z (Input) | 1" 3/8 Z6 splined | |
| X / Y Shaft Offset | 120.5 mm each side of centreline | |
| Shaft Centre Distance | 120 mm (X to Y) | |
| Konut Genişliği | 225 mm | |
| Housing Total Height | 339.5 mm (112 mm + 227.5 mm) | |
| Input Flange | N°8×M8, Φ105 mm register | |
| Main Mounting Bolts | N°8×M16 | |
| Secondary Register | N°4×M8, Φ105 mm | |
| Compatibility | Replacement of Comer Code, HD round baler & harvester applications | |
Round Baler Gearbox Working Principle
Power enters the EP-T-290HD through Shaft Z — the PTO-side input — which carries a 1" 3/8 Z6 involute spline profile, compatible with standard agricultural PTO shafts and round baler driveline couplings. Once inside the housing, the input torque passes through a matched helical gear stage that splits and steps the rotational speed according to the selected ratio: at ratio 1.63, the output shafts turn faster relative to the input, which is the setting preferred for high-belt-speed bale chamber applications; at ratio 3.0, the output is slower but torque multiplication is substantially higher — 2180 Nm at 540 RPM input — which suits heavy-stem crop processing and large-format bale production.
The two primary output shafts, Shaft X and Shaft Y, are both equipped with an involute spline profile of 40×2×18 (pitch circle diameter 40 mm, module 2, 18 teeth). Positioning them at equal offset distances of 120.5 mm either side of the gearbox centreline ensures balanced load distribution to the left and right sides of the bale chamber drive circuit. This symmetric layout is critical in maintaining even belt tension and uniform bale density — a requirement that high-output balers in professional contracting environments consistently demand. The symmetric shaft arrangement is also what defines this round baler gearbox type as a centre-split power distributor, rather than a simple offset reducer.
The mounting architecture uses a Φ105 mm register bore with an 8-bolt M8 input flange pattern, a robust 8-bolt M16 main chassis mounting pattern, and an additional 4-bolt M8 secondary register at Φ105 mm for precise housing alignment. Understanding this round baler gearbox working principle allows technicians to assess load paths, identify wear patterns, and plan service intervals — particularly important when the unit is asked to process abrasive materials like dry cereal straw or dense biomass crops that generate elevated radial and axial shaft loads over long operating sessions.
Five Key Advantages of the EP-T-290HD
① Dual-Ratio Flexibility for Mixed PTO Equipment
The ability to operate at either 1.63 or 3.0 gear ratio — at input speeds of 540 and 1000 RPM respectively — means this round baler gearbox for tractor use integrates with both legacy 540 RPM tractor PTOs and modern economy-PTO drives running at 1000 RPM. Farmers and contractors running a diverse tractor fleet no longer need separate gearbox part numbers for different machines. One gearbox specification covers the majority of PTO configurations encountered in real-world arable, livestock, and mixed farming operations across global markets.
② High Output Torque with Thermal Headroom
With 2180 Nm available at the output shafts in 540 RPM mode and 1694 Nm in 1000 RPM mode, this unit provides considerably more torque than the bale chamber mechanisms of most large round balers actually require under normal crop conditions. That headroom matters in practice: wet grass, dense legume haylage, or high-biomass energy crops all generate torque spikes well above average — and a round baler gearbox that regularly operates at or near its rated limit will run hotter and wear faster than one with genuine reserves. The EP-T-290HD is specified for sustained heavy-duty use, not intermittent light-load cycling.
③ Symmetric Dual-Output Architecture
Shaft X and Shaft Y exit the housing at exactly equal offsets of 120.5 mm from the gearbox centreline, with a fixed centre distance of 120 mm between them. This geometric precision ensures that both drive circuits — typically the left and right bale-chamber belt drives — receive identical rotational inputs, preventing the asymmetric belt wear that results from even minor power imbalances. For contractors running continuous-cycle baling shifts through long harvesting days, uniform belt wear translates directly into lower belt replacement costs and more consistent bale shape and density across an entire field's output.
④ Verified Comer Code Drop-In Fitment
As a Round Baler Gearbox Replacement of Comer Code, the EP-T-290HD reproduces the original flange geometry: Φ105 mm register bore with an 8-bolt M8 pattern at the input, 8-bolt M16 chassis mounts, and a 4-bolt M8 secondary locating register. These dimensions are not approximations — they are produced to the same tolerances as the original Comer specification to ensure that the replacement unit seats without shimming, packing, or bracket fabrication. This is the benchmark of what is an aftermarket round baler gearbox designed for professional use, as distinct from generic alternatives that require adaptation.
⑤ ISO 9001:2015 Certified Production Process
Every EP-T-290HD unit is manufactured under an ISO 9001:2015 quality management system covering incoming material inspection, in-process gear geometry verification, bearing preload setting, and final assembly run-in testing at rated speed. Buyers sourcing round baler gearbox parts for fleet maintenance programmes can request batch quality documentation — material mill certificates, CMM inspection records, and run-in test reports — providing the audit trail that professional procurement departments and agricultural equipment dealers increasingly require when specifying aftermarket drivetrain components.
Materials, Tolerances, and Build Quality
The housing of the EP-T-290HD is cast from ductile iron (GGG50 / QT500-7 grade), which offers a tensile strength roughly 70% higher than standard grey cast iron at the bearing-seat transition zones most susceptible to fatigue cracking in high-duty-cycle applications. The casting is stress-relieved before machining to prevent dimensional distortion at the bore seats, and all critical register surfaces — including the Φ105 mm input and secondary bores — are finish-machined in a single setup to guarantee concentricity within 0.02 mm. This level of dimensional control is what separates a genuinely engineered round baler gearbox from a commodity casting that merely resembles one in external appearance.
Internal gears and shafts are produced from alloy steel to 42CrMo4 specification (or equivalent), carburized and case-hardened to a flank surface hardness of 58–62 HRC while maintaining a tough ferritic core with Charpy impact values adequate for the shock loading conditions characteristic of field baling. The 40×2×18 involute spline profiles on Shaft X and Shaft Y are hobbed and verified by coordinate measuring machine (CMM) to DIN 5480 standard — the appropriate reference for fine-pitch involute splines in agricultural power transmission applications. Shaft Z, with its 1" 3/8 Z6 SAE spline, is produced and gauged to SAE J498 to ensure compatibility with standard PTO couplings across North American, European, and Australasian tractor markets.
Sealing is achieved through double-lip oil seals with PTFE primary lips and spring-loaded secondary exclusion lips on all external shaft exits. The gearbox is factory-filled with SAE 90 EP mineral gear oil (or equivalent synthetic) and is shipped ready for installation. The oil fill level is set to immerse the lower gear mesh at operating tilt angles of up to 15° — the range of ground gradients encountered during field operations on sloped terrain in areas such as the hill country of New Zealand, the Yorkshire Wolds in the UK, and the Pampas regions of Brazil.
Uygulama Senaryoları
The EP-T-290HD round baler gearbox equipment is designed for heavy-duty agricultural use across a range of crop types, machine platforms, and operating environments. The dual-ratio capability and high output torque make it one of the most versatile round baler gearbox types currently available as a Comer code replacement.
Large Round Baler Operations — Hay and Haylage
In grass and legume baling across the UK, Ireland, and the Netherlands, large round balers with bale diameters from 1.25 m to 1.65 m routinely process 200–400 bales per day during peak silage harvest. The EP-T-290HD's 78 kW input rating and 2180 Nm output torque give contracting businesses the assurance that the round baler gearbox will sustain continuous duty without temperature-related oil breakdown or premature bearing failure, even during sustained 10-hour operating days.
1000 RPM Economy-PTO Tractor Pairing
Modern tractors rated above 130 HP typically offer a 1000 RPM economy PTO mode that runs the engine at lower RPM while maintaining full shaft speed. Paired with the EP-T-290HD at ratio 3.0 and 1000 RPM input, operators achieve 58 kW transmission power with significantly reduced tractor fuel consumption per bale — a measurable operational economy relevant to large arable enterprises in Australia, Canada, and continental Europe where fuel cost per tonne of harvested material is a key production metric.
Straw and Residue Baling Post-Combine
Cereal straw baling follows immediately after the combine pass, when field windows are short and baling pace is highest. The abrasive silica content of wheat and barley straw accelerates wear on pick-up tines and baling belts, but the shaft sealing system on the EP-T-290HD — with its double-lip PTFE seals — prevents chaff and dust from reaching the gear mesh or bearing races. This matters especially in South Korea, Japan, and the Australian grain belt where paddy and wheat straw volumes per day are substantial.
Biomass Crop Baling for Energy Production
Miscanthus, switchgrass, and dedicated energy sorghum baling imposes some of the highest torque demands of any round baler application due to the stem diameter and moisture content of these crops at harvest. The 3.0 gear ratio mode of the EP-T-290HD is specifically suited to these applications, providing higher torque multiplication for slower, denser crop feeding without risking the slippage or shock-load failures that lighter-duty round baler gearbox equipment would encounter in biomass energy crop operations across Germany, France, and Colombia.
System-Compatible Products — One-Stop Baler Drivetrain Supply
We produce the complete drivetrain assembly for round baling systems, not just individual gearbox units. Sourcing your round baler gearbox parts, driveshafts, and baler equipment from a single technical supplier eliminates the compatibility uncertainty that comes from mixing components across different manufacturers — particularly important when shaft spline standards and flange geometries must align across multiple assemblies.
Round Baler PTO Shaft — Matched to EP-T-290HD
O yuvarlak balya makinesi PTO şaftı we supply is sized and splined to pair directly with Shaft Z of the EP-T-290HD. The 1" 3/8 Z6 coupling interface matches without adapter sleeves, and the shaft is available in multiple working lengths to fit the tractor-to-baler hitch distance on standard drawbar configurations. All PTO shaft assemblies are supplied with overrunning clutch protection compliant with ISO 5674 for safe operation during bale ejection and belt reversal events.
Full Round Baler Equipment — Complete Machine Supply
Beyond replacement gearboxes, we support buyers who need complete baling systems. Our round baler catalogue covers variable-chamber and fixed-chamber designs, with all drivetrain components — including the EP-T-290HD round baler gearbox for tractor integration — specified and verified as a complete system. This approach eliminates the risk of mismatched components and ensures that the gearbox, belts, rollers, and PTO shaft are designed to work together from the outset, reducing commissioning time and increasing field reliability from day one.
Üretim Tesisimiz Hakkında
Our team brings more than ten years of focused engineering experience in mechanical power transmission, built through direct involvement in the design, manufacture, and field support of agricultural and industrial drivetrain products. This depth of hands-on knowledge is reflected in how we approach each product specification — not as a replication exercise, but as an engineering review against the actual application demands our customers describe. The portfolio we have developed spans agricultural gearboxes, worm gear reducers, planetary gear drives, power take-off shafts, hydraulic cylinders, gears, sprocket assemblies, chains, and electric motors — a breadth that supports genuine one-stop sourcing for complex machine builds and maintenance programmes.
Our manufacturing site operates under ISO 9001:2015 certification, covering all production processes from raw material intake and casting quality to finish machining, assembly, and pre-shipment testing. We work with a range of base materials — ductile iron, grey cast iron, cast steel, precision cast steel, and cast aluminium — selected to match the mechanical property requirements of each specific component type. Custom and non-standard mechanical parts, including bespoke gears, sprockets, worm sets, pulleys, shaft assemblies, and special-purpose housings, are produced within the same facility and quality system as our standard catalogue items.
For buyers who need documented evidence of manufacturing capability — ISO certificates, material test reports, dimensional inspection records, or third-party audit readiness — we maintain current documentation and can provide it as part of the quotation or order confirmation process. This transparency is a basic expectation in professional B2B sourcing of round baler gearbox equipment, and one we meet as standard practice, not as an exception.
Çalıştay
Supply and Trade Terms
Minimum Order Quantity
This round baler gearbox is evaluated as a high-value drive product: MOQ is determined by configuration and total order value, not a fixed unit count. Single-unit orders of 1–2 pieces can be accommodated for replacement or trial purposes. Mixed model orders combining different gearbox specifications are supported when the combined invoice value reaches approximately USD 1,500.
Production Lead Time
Standard configured units: 20–45 working days from order confirmation. For sample quantities of 1–5 units, delivery is typically achievable within 7–25 working days. Units requiring non-standard shaft modifications, surface treatments, or custom gear ratios are assessed individually — contact us with your specification for a specific lead time commitment.
Trade Terms Available
EXW, FOB, CIF, and DAP are standard incoterms for gearbox equipment orders. FCA, CFR, CPT, CIP, and DDP are available for buyers who need delivered-duty-paid pricing to specific destinations. For urgent single-unit spares, DDP courier service is available on request, particularly for emergency replacements during harvest season.
Sample and Trial Policy
New buyers may request a sample unit of 1–5 pieces before committing to a production volume order. Sample units are supplied as fully assembled, tested, and production-representative items — not simplified prototypes. Please contact us with your original Comer code reference or current gearbox part number to confirm exact fit before ordering.
Sıkça Sorulan Sorular
What is the best round baler gearbox replacement for a Comer-coded unit when the original part number is discontinued and my baler runs a 1000 RPM tractor PTO?
When the original Comer code reference is no longer in circulation, the most reliable cross-reference method is to match three parameters: shaft spline specification, gear ratio, and input RPM. The EP-T-290HD covers both 540 and 1000 RPM inputs at ratios of 1.63 and 3.0 respectively. If your discontinued unit ran at 1000 RPM, the 3.0 ratio mode of the EP-T-290HD is the appropriate match — simply confirm the Shaft Z spline (1" 3/8 Z6) and the X/Y output spline (40×2×18) match your existing driveline couplings, and the replacement will install without modification.
How many HP does a tractor need to run a large round baler with a heavy-duty round baler gearbox fitted in a dense straw crop in the Australian grain belt?
In dense cereal straw conditions, a minimum of 80–100 HP at the PTO is considered the practical starting point for balers using a heavy-duty round baler gearbox rated above 60 kW input. For the EP-T-290HD at 540 RPM, the 78 kW rating corresponds to approximately 105 HP. Running significantly below this in dense straw will cause the gearbox to work at the edge of its thermal capacity, shortening oil life and bearing service intervals. For the Australian grain belt, where straw volumes are high and ambient temperatures can elevate oil operating temperatures further, using a tractor with 110–130 HP PTO output provides a sensible margin above the rated figure.
What is the difference between round baler gearbox models with a single fixed ratio and a dual-ratio unit like the EP-T-290HD when used on mixed grassland and arable farms in the UK?
A single-ratio round baler gearbox is simpler and slightly lighter, but it commits the operator to one PTO speed and one belt-drive ratio across all crop types. On a mixed UK farm baling both ryegrass haylage at 540 RPM and wheat straw at 1000 RPM economy PTO, a fixed-ratio unit means either two different gearboxes or operating one of the crop types at a sub-optimal speed. The dual-ratio EP-T-290HD eliminates that compromise — the gearbox is field-switchable between modes, and the torque figures at both speeds (2180 Nm and 1694 Nm respectively) exceed the demands of typical mixed-farm baling scenarios without requiring machine modification.
Where can agricultural machinery dealers in South Korea and Brazil source certified round baler gearbox parts with ISO documentation and short delivery windows for seasonal harvest support?
Direct procurement from an ISO 9001:2015 certified manufacturing facility — rather than through regional distributors holding limited stock — typically delivers both shorter lead times and better traceability for seasonal harvest procurement. For South Korea and Brazil, we support FOB and CIF incoterms with standard lead times of 20–45 working days for production units, and can arrange DDP courier shipment for urgent single-unit replacements during active harvest windows. All units are supplied with quality documentation upon request, including material certificates and dimensional inspection records meeting the requirements of most agricultural machinery dealer quality programmes.
How do I identify which round baler gearbox type is right for my harvester when the machine originally ran a Comer-coded unit and I need to compare current aftermarket options?
Start by recording four key measurements from the existing unit or machine drawing: input shaft spline (profile and tooth count), output shaft spline or dimension, gear ratio (usually stamped on the housing or listed in the operator manual), and flange bolt pattern and register diameter. For the EP-T-290HD, these are: Shaft Z input 1" 3/8 Z6, Shaft X/Y output 40×2×18 involute spline, ratio 1.63 or 3.0, input flange 8×M8 on Φ105 mm register, and chassis mount 8×M16. Matching all four identifiers to your existing unit — rather than just the ratio or the shaft size alone — is what confirms a round baler gearbox comparison is genuinely like-for-like rather than an approximation.
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