EP9.35-Rundbalpressväxellåda för rundbalpress och skördetröska
De EP9.35 Round Baler Gearbox is a heavy-duty power transmission unit engineered for high-capacity round balers and harvesters. Featuring a precise 1.92:1 deceleration ratio, it efficiently converts a standard 540 r/min input into an optimized 282 r/min output. Designed for extreme agricultural demands, this gearbox boasts a nominal power rating of 120 kW and an exceptional maximum capacity of 3000 kW, ensuring reliable performance under peak loads. It utilizes advanced Gleason Helical Teeth technology, providing superior load distribution, reduced noise, and enhanced durability compared to standard gearing. Built to withstand harsh field conditions, the EP9.35 delivers consistent torque and longevity. Custom configurations are available to meet specific machinery requirements, making it a robust choice for modern, high-output harvesting equipment.
Round Baler Gearbox Series — Heavy-Duty Integrated Drive
EP-Round Baler Gearbox for Round Baler and Harvester — EP9.35
An integrated wide-span round baler gearbox assembly rated at 120 hp nominal / 3000 hp peak, built on a 1.92:1 deceleration ratio across a 1353 mm total driveline span — engineered for the most demanding large-scale baling and harvesting operations globally.
Technical Data — EP9.35 Round Baler Gearbox
The performance parameters below are drawn directly from the EP9.35 certified data sheet. Nominal ratings reflect sustained continuous-duty operation; peak figures represent the maximum momentary capacity the assembly is designed to withstand without structural failure. Custom specifications are accepted on request.
| Modell | Typ | Ratio (i) | Input (r/min) | Utgång (r/min) | Nom. Power (hp) | Peak Power (hp) | Toothing | Suitable For |
|---|---|---|---|---|---|---|---|---|
| EP9.35 | Decelerate | 1.92 : 1 | 540 | 282 | 120 | 3000 | Gleason Helical | Round baler, harvester, etc. |
| Custom gear ratios, extended shaft configurations, and special surface treatments are available upon request. Contact the engineering team for application-specific assessments. | ||||||||
Overall Assembly Dimensions — Front View
All measurements in millimetres. The EP9.35 is an integrated assembly; key reference dimensions are provided below for installation planning and frame clearance verification. Full GD&T drawings are available in DXF and STEP formats on request.
| Parameter | Dimension | Parameter | Dimension |
|---|---|---|---|
| Total Assembly Length (front view) | 1353.0 mm | Total Assembly Length (side view) | 1564.9 mm |
| Cross-Shaft Centre Span | 866.0 mm (433.0 + 433.0 mm) | Left-Side Module Span | 821.0 mm |
| Right-Side Module Span | 856.0 mm | Central Housing Width | 180.0 mm |
| Stub-Shaft Housing OD | 210.0 mm (end flanges) | Inner Shaft Tube OD | 170.0 mm / 162.0 mm (outboard) |
| Central Body Height (to output) | 367.0 mm | Output Shaft Engagement (spline) | 78 mm total / 38 mm spline depth |
| Output Spline Profile | 8×48×42×8 rectangular spline | End Flange Bolt Pattern | 8 × Ø19.0 mm (4-65.0 PCD) |
| Central Housing Plan Width | 285.0 mm | Side PCD dimensions | 77.5 + 77.5 mm (285.0 total) |
| Housing Centre Height (upper) | 523.1 mm | Housing Centre Height (lower) | 363.3 mm |
| Bottom Output Shaft OD | Ø91.2 mm | Central Module Front Height | 294.0 mm / 260.0 mm |
EP9.35 — A Different Class of Round Baler Gearbox
Most round baler gearboxes occupy a compact envelope — a single housing bolted to the baler frame, driving one or two output shafts. The EP9.35 takes a structurally different approach. It is an integrated drive assembly: a central reduction gearbox flanked by two symmetrical stub-shaft modules that span the full width of the baler frame, creating a single factory-assembled unit 1353.0 mm long in the front view and 1564.9 mm in the side view. This integrated architecture eliminates the shaft alignment procedures, coupling selection decisions, and assembly-sequence complications that come with installing a standalone round baler gearbox and separate driveshafts as independent components.
At the performance level, the EP9.35 stands apart from both the EP2100-T3 and EP246 models that sit below it in the series. Its nominal continuous rating of 120 hp — with a peak capacity reaching 3000 hp — positions it as a round baler gearbox for tractor pairings above the 100 hp line, including the 120–160 hp tractors that are now standard in large-acreage grain belt operations across Canada, Australia, and South America. The 1.92:1 deceleration ratio produces 282 r/min at the output end from a standard 540 r/min PTO input, the same output speed as the EP246, which keeps bale chamber roll velocity consistent when the two models are used in different machines within the same fleet.
The central gearbox body sits on a 866.0 mm cross-shaft span (433.0 mm to each side from centre) and interfaces with the baler frame through a square flange pattern. The output shaft carries an 8×48×42×8 rectangular spline, sized for the high torque density the 3000 hp peak specification requires. End shaft assemblies at both extremities — each 162.0 mm in diameter at the flange face and 210.0 mm at the outer journal — terminate in gear-splined coupling zones that engage directly with the baler's side-drive shafts without intermediate yokes or couplings in most baler configurations. This is a round baler gearbox type designed to be the structural backbone of the baling driveline, not merely one component within it.
Round Baler Gearbox Working Principle — EP9.35 Integrated Drive
The round baler gearbox working principle in the EP9.35 follows the same basic power-conversion logic as smaller single-housing units — tractor PTO input reduced to a lower-speed, higher-torque output — but the mechanical implementation reflects the assembly's much larger power envelope. Power enters through the PTO-side input on the central reduction module at 540 r/min. Inside the central housing, a Gleason Helical Teeth gear pair — manufactured to the same tooth geometry principles as the rest of the EP series — delivers the 1.92:1 reduction, producing 282 r/min at the primary output shaft. The helical contact pattern distributes the input torque load progressively across the full face width of each tooth, which at the EP9.35's peak capacity is the only realistic way to maintain acceptable Hertzian contact stress levels without resorting to multi-stage reduction or twin gear sets.
From the primary output, power splits bilaterally through the integrated cross-shaft modules extending to each side of the central housing. These modules — each 433.0 mm from housing centre to the end mounting face — carry the full output torque through their respective stub shafts and deliver it simultaneously to both sides of the baler frame. The symmetrical arrangement is not cosmetic: it balances the radial load on the central housing's output bearing, preventing the shaft deflection under one-sided loading that would otherwise accelerate seal and bearing wear in a single-output configuration at this torque level. The 8×48×42×8 rectangular spline at the output stub (78 mm engagement length, 38 mm spline depth) provides a robust, non-slip drive connection to the baler's cam ring or roll drive shaft.
The central gearbox body uses a fabricated or heavy-section cast housing — substantially more rigid than the housings used in mid-range round baler gearbox equipment — sized to contain the gear mesh at 3000 hp peak without housing deflection that would alter gear centre distance and contact ratio. Internal lubrication is by oil-splash with directed channel feeding to the gear contact zone, supported by large-diameter taper-roller bearings at all shaft journals, each pre-loaded during assembly to specified preload values. The total assembly weight and span mean installation into a new baler frame or as a round baler gearbox replacement is a structured mechanical event requiring a hoist and alignment tooling — not a workshop bench operation — which is reflected in the 8-bolt Ø19.0 flange holes and machined location registers on the central housing mounting faces.
Five Reasons the EP9.35 Stands Above Standard Round Baler Gearbox Equipment
The EP9.35 is rated at 120 hp continuous nominal power with a 3000 hp peak capacity. That peak figure reflects the mechanical reserve engineered into the gear set, housing, shafts, and bearings to handle momentary overload events — sudden slug ingestion, wedged crop, or unexpected mechanical resistance — without gear tooth fracture, housing rupture, or bearing seizure. For large-baler operators working in Canadian and Australian grain belts where baler drivelines are stressed hard during peak harvest windows, this overload reserve is what separates a reliable agricultural round baler gearbox from an underspecified one.
Because the EP9.35 ships as a complete 1353 mm integrated assembly — central gearbox and both lateral stub-shaft modules pre-assembled and factory-aligned — the installation crew does not need to set up shaft alignment between a standalone round baler gearbox and separate output shafts. The assembly drops into position and bolts directly to the baler frame mounting faces. This eliminates a common source of post-installation vibration, bearing overload, and premature seal failure in configurations where shaft-to-shaft alignment depends on site measurement and shimming.
The EP9.35 delivers power simultaneously through both lateral stub shafts, symmetrically about the central gearbox. This bilateral output distributes the reaction torque evenly across the baler frame mounting points — preventing the frame twist that single-side-output configurations impose under high torque conditions. For operators running large fixed-chamber balers in the Netherlands, South Korea, and Brazil, where frame fatigue cracking around the gearbox mounts is a known long-term maintenance issue with single-output round baler gearbox replacement units, the EP9.35's symmetric architecture offers a structural improvement over the alternatives.
The central output shaft carries an 8×48×42×8 rectangular spline, a profile with a much larger tooth contact area than the smaller splines used on mid-range round baler gearbox for tractor models. The rectangular spline geometry distributes torque across eight engagement faces simultaneously, keeping the contact stress per tooth well within the material's allowable range even during the 3000 hp peak transients. The 78 mm total engagement length (38 mm spline depth) provides adequate axial load capacity without requiring additional retention hardware in most baler mounting configurations.
The Gleason Helical Teeth specification carries through to the EP9.35 regardless of the assembly's size step-up from smaller EP models. Helical contact ensures smooth, progressive tooth engagement across the full face width — essential at the EP9.35's power level because any impulsive tooth loading at 3000 hp peak would exceed the fracture toughness of even well-heat-treated case-hardened alloy steel. The Gleason process maintains the geometric consistency in lead and profile that allows the gear set to share load evenly across the face width rather than concentrating load at one end due to shaft deflection or helix deviation.
Materials, Construction & Quality Verification
The EP9.35's central housing operates under far greater loading than a compact agricultural round baler gearbox, and the material specification reflects that difference. The housing is produced in either high-strength ductile iron (minimum tensile strength ≥500 MPa, GGG60 class) or cast steel depending on the specific configuration, with machined mating faces achieving Ra 1.6 µm or better at all critical sealing and register surfaces. The additional material mass — compared to lighter cast iron housings — is not incidental: it provides the structural stiffness necessary to maintain gear centre distance within tolerance under the large bending moments the 866 mm cross-shaft span generates during asymmetric field loading events.
The gear pair uses 20CrNiMo or 18CrNiMo7-6 alloy case-hardening steel, carburised to a case depth of 1.2–1.6 mm at the tooth flanks and quench-hardened to 58–62 HRC surface hardness. The core remains at 28–38 HRC, preserving the ductility needed to resist through-fracture under the high-impact loading conditions the EP9.35 will see during peak operation. Shafts — particularly the cross-shaft modules — are machined from 42CrMo4 or 34CrNiMo6 alloy steel, normalised and quench-tempered before rough machining, then finish-ground at bearing journals and spline sections. Bearing selection uses large-bore taper-roller designs, preloaded at assembly to eliminate axial play and maintain gear contact geometry across the operating temperature range the assembly will experience in the field.
Manufacturing and inspection run under the ISO 9001:2015 certified quality management system. Each EP9.35 assembly undergoes dimensional inspection of all critical mating surfaces before assembly, a gear contact pattern check under loaded conditions, and a minimum 30-minute loaded run-in at rated input speed with oil temperature and vibration signature recording. The documented test report ships with the unit, providing the traceability data required at customs clearance and machinery registration in regulated markets including the EU, UK, Canada, Australia, and South Korea.
Application Scenarios — Where the EP9.35 Is Specified
The EP9.35 occupies the top end of the round baler gearbox type spectrum. Its specification is driven by applications that either demand sustained high-power operation, require an integrated drive assembly for mechanical simplicity, or face frame-loading constraints that make bilateral output architecturally necessary. The following are the primary use environments where engineers and procurement teams select the EP9.35.
Fixed-chamber balers operating above 100 hp in the Canadian prairies, Australian grain belt, and South American pampas push the limits of standard round baler gearbox equipment in daily back-to-back field operation. The EP9.35's 120 hp continuous rating and 3000 hp peak capacity give these machines a genuine mechanical reserve, allowing the baler to maintain rated throughput during slug events without the torque-limiter interventions that disrupt productivity.
Modern combine harvesters in the 130–180 hp segment increasingly integrate rear-mounted baling modules driven from an on-board PTO. These configurations draw from a PTO power budget that is shared with the header, threshing drum, and cleaning system — meaning the round baler gearbox must operate without requesting more than its rated share. The EP9.35's efficiency and overload resilience make it a technically sound choice for harvester-integrated baling at this power level, particularly in the UK, Netherlands, and German market where integrated harvester-baler combinations are an established product category.
Biomass baling — processing switchgrass, miscanthus, sugarcane tops, or crop residue for energy pellet feedstock — frequently occurs at higher material densities and over longer continuous operating periods than conventional hay baling. These duty cycles stress the round baler gearbox harder and for longer than seasonal hay work. The EP9.35's substantive thermal mass, robust housing construction, and oil-splash lubrication sized for the 120 hp continuous load make it a natural match for biomass baling programmes in Brazil, Colombia, and South Korea's growing agricultural energy sector.
Agricultural machinery manufacturers building their 120+ hp baler platform in Europe, North America, or Asia source the EP9.35 as the complete integrated driveline sub-assembly. The factory-aligned delivery, ISO 9001:2015 quality documentation, and available CAD data package allow OEM integration engineers to validate fit-up from the drawing rather than from physical trial, compressing the design-to-production timeline for new platform launches. The integrated architecture also simplifies the bill of materials, replacing multiple discrete driveline components with a single sourced assembly.
Commercial baling contractors running large fleets across the UK, Australia, and the Netherlands specify the EP9.35 as the round baler gearbox replacement unit for their top-end balers. The integrated assembly approach eliminates the post-replacement alignment verification step that consumes workshop time when fitting standalone gearbox-plus-shaft configurations, and the overload reserve means interval between replacements is longer than with lighter-duty units that were operating near their rated limits.
Matched System Components — Complete Round Baler Drivetrain
The EP9.35 round baler gearbox is the centrepiece of the driveline, but what sits upstream and downstream of it determines whether the system meets its rated performance over time. A PTO shaft under-rated for the EP9.35's 120 hp continuous input will fail prematurely; a baler machine with a cam ring rated below the EP9.35's output torque capacity will become the weak point instead. Sourcing the complete system from the same supply chain eliminates these interface mismatches and provides a single warranty and documentation chain.
De rundbalpressens kraftuttagsaxel upstream of the EP9.35 must be selected for the 120 hp continuous duty class. Our matched PTO shafts for this specification include CE-approved safety guarding, wide-angle constant-velocity joints for articulated tractor-baler combinations, and torque limiters calibrated to the EP9.35's overload profile rather than a conservative general agricultural standard. Getting the torque limiter calibration right is particularly important given the EP9.35's 3000 hp peak capacity — if the limiter trips too early, it disrupts operation; too late, and it fails to protect the tractor driveline during a genuine jam event.
For operations sourcing the full baling system rather than individual drivetrain assemblies, the full series round baler range includes machines built around EP-series round baler gearboxes at the appropriate power class. Factory integration means the bale chamber, pick-up, wrapping system, and gearbox have all been matched at the design stage — operators in Brazil, Canada, the Netherlands, and South Korea receive a system that has been torque-balanced, not one assembled from separately sourced components whose interface compatibility depends on the buyer's engineering judgement.
Trade & Delivery Conditions — EP9.35
The EP9.35 is assessed on total order configuration and project value. High-value drive assemblies of this class are evaluated based on configuration and total order value. New customers evaluating the EP9.35 for an integration project may request a 1–2 unit sample order. Mixed-model orders combining the EP9.35 with other EP series round baler gearbox parts can be consolidated to meet the standard USD 1,500 order minimum.
Standard EP9.35 (catalogue configuration): 20–45 working days. Custom or non-standard configuration (modified shaft dimensions, special spline profiles, bilateral output adjustment): 45–75 working days. Sample / evaluation units (1–2 pcs): 7–25 working days depending on configuration complexity. All lead times are confirmed at order acceptance.
Standard terms: FOB / CIF / DAP / EXW. For large integrated assemblies of the EP9.35's physical scale, FOB and CIF are the most practical options for sea freight to markets in Australia, Canada, Brazil, South Korea, and the Netherlands. DDP and FCA terms are negotiable for specific projects. Trade term preference is confirmed at enquiry stage.
1–2 EP9.35 sample units are available for new customers assessing the assembly for OEM integration or commercial round baler gearbox replacement projects. Each unit ships with the ISO 9001:2015 quality certificate, pre-dispatch run-in test records, and dimensional inspection report. CAD data (DXF, STEP) is available on request alongside sample orders.
About Us — Over a Decade of Agricultural & Industrial Transmission Engineering
With more than ten years focused on mechanical power transmission for agricultural and industrial applications, the facility operates across the full spectrum of transmission components: agricultural gearboxes including the complete EP round baler gearbox series, worm gear reducers, planetary gear drives, power take-off shaft assemblies, hydraulic cylinders, roller chains, sprockets, and electric motors. Both standard catalogue products and fully custom assemblies are within scope, with in-house CNC machining, gear grinding, and heat treatment capability covering the most critical manufacturing steps rather than outsourcing them to sub-suppliers.
Quality management runs under ISO 9001:2015 certification, applied consistently across the entire product range from small standard sprockets to large integrated assemblies like the EP9.35. Material coverage spans ductile iron, grey cast iron, cast steel, precision cast steel, and cast aluminium — with each allocation based on the stress analysis and service conditions of the specific application, not a blanket material policy. In-house gear and sprocket production covers spur, helical, bevel, and worm gear types, as well as transmission shafts, pulleys, and worm sets to standard and non-standard specifications.
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Vanliga frågor
What is the difference between the EP9.35 round baler gearbox and a standard single-housing round baler gearbox for tractor-mounted balers in Australia and Canada?
How many HP does it take to pull a round baler fitted with the EP9.35 gearbox at full throughput in silage conditions in the Netherlands or UK?
Which round baler gearbox parts in the EP9.35 assembly should agricultural workshops in South Korea and Brazil stock as preventive maintenance spares?
Where can agricultural OEM engineers and procurement managers in Europe source a round baler gearbox with full engineering drawing exchange and ISO certification for a new baler platform programme?
How does the EP9.35's 8×48×42×8 rectangular spline output compare to the ASAE S203.14 spline profiles used on smaller round baler gearbox types for standard agricultural PTO shafts?
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