Flail Mower Gearbox EP31

Rotary Cutter Gearbox for Rotary Cutter / Brush Cutter — model EP31.

Detailed Technical Specifications — EP31

The Flail Mower Gearbox EP31 is engineered as a rotary cutter gearbox for rotary cutter / brush cutter applications. Designed to transfer 90° PTO power to the horizontal cutter blade shaft, the unit covers 25–100 HP input ratings and is built for high-impact intermittent loads from brush and saplings.

Tekniska funktioner hos roterande skärväxellåda

Each of the cards below describes a specific, measurable attribute of the EP31 unit. Generic claims have been kept out — every number here is tied to a manufacturing process or a verified test result.

Kompatibilitet och korsreferens

The EP31 is designed as a drop-in or close-substitute fit for a number of OEM gearbox positions used on tractors and rotary cutter / brush cutter implements globally. The table below summarizes commonly cross-referenced brands. Final fitment must be verified by physical dimension matching.

Tillgängliga reservdelar (säljs separat)

• Ingående pinjong-underenhet
• Utgående konisk kugghjul
• Koniska rullagersats
• Utgående axel (varianter med kil och splines)
• Ingående axel (1 3/8″ 6-spline)
• Skeleton oil seal kit

Hur man väljer rätt roterande skärväxellåda

Use the three-step approach below to match a EP31-class unit to your tractor and implement.

1. Mäta — registrera traktorns kraftuttagsstandard (540/1000 varv/min, splineantal), redskapets ingående axeldiameter och längd samt det tillgängliga bultmönstret vid redskapets nos.
2. Match — cross-check those measurements against the spec table for the EP31. The flange, shaft, and ratio need to all line up before moving on.
3. Verifiera under belastning — bekräfta att den nominella ineffekten och utgångsmomentet är tillräckliga för dina maximala driftsförhållanden (t.ex. våt jord, tät gröda, kallstart).

Checklista för urvalskriterier

Typiska tillämpningar och kraftöverföringsuppgifter

The EP31 is engineered for rotary cutter / brush cutter. The scenarios below describe the specific power-transmission tasks the gearbox is designed to handle, with details of mounting position, drive path, and the technical demand on the gear and bearing set.

Installations- och driftsättningsguide

Korrekt installation av roterande skärväxellåda är den enskilt viktigaste faktorn för att uppnå den avsedda livslängden. Följ stegen nedan i ordning. Att hoppa över eller komprimera ett steg visar sig vanligtvis som oljeläckage, för tidigt lagerhaveri eller buller under den första säsongen.

1. Säkerhetsförberedelser. Stäng av traktorns motor, ta ur nyckeln, koppla ur kraftuttaget, dra åt parkeringsbromsen och lägg hjulblock. Använd skyddshandskar och ögonskydd. Kontrollera att redskapet står på stabila stöd innan något arbete på drivlinan påbörjas.
2. Kontrollera växellådan före montering. Check that the EP31 model number, input flange dimensions, and input/output shaft specifications match both your tractor PTO and the implement input shaft. Mismatched flange or spline patterns will not be corrected by force-fitting.
3. Fill with lubricant. Before first use, fill with the specified lubricant — typically SAE 80W-90 GL-5 — to the centre of the oil-level window. Refer to the spec table for the exact oil capacity for your unit; underfilling causes early bearing wear, overfilling raises oil temperature and stresses seals.
4. Mount and torque the bolts. Bolt the gearbox flange to the implement using the OEM bolt set. Tighten in a diagonal pattern in three passes to the final torque (~ 140 N·m for M16 grade 8.8). Even loading prevents flange distortion and seal leak paths.
5. Connect the input PTO shaft. Attach the PTO drive shaft yoke to the gearbox input shaft. Confirm the locking pin or push-pull collar fully engages. Re-attach the safety shield with both retaining chains hooked to the tractor and implement, never spinning with the shaft.
6. Connect the output shaft. Slide the output shaft into the implement working shaft, align keys or splines, and lock with the supplied retaining nut and washer. Verify shaft end-float is within manufacturer tolerance — usually 0.05 mm to 0.20 mm.
7. Check shaft alignment. With the gearbox bolted and shafts connected, slowly rotate by hand. Total run-out (TIR) at the input and output should not exceed 0.10 mm. Any tight spot or audible scrape indicates an alignment issue that must be corrected before powered operation.
8. No-load test run. Engage the PTO at low engine RPM (idle to 540 RPM) for five to ten minutes. Listen for unusual noise, watch for oil seepage, and check housing temperature by hand — it should be warm to the touch but not hot enough to be uncomfortable.
9. Run-in under partial load. For the first 50 hours of duty, avoid full-rated load. Vary speed and load lightly to seat the gear teeth and bearings. After the run-in period, drain the lubricant — it will contain microscopic break-in particles — and refill with fresh oil of the same grade.
10. Establish a maintenance schedule. Inspect oil level every 200 operating hours or weekly during heavy use. Drain and replace the gear oil every 500 hours or once per season, whichever comes first. Wipe the housing exterior after each shift to prevent soil buildup that traps moisture against seals.

Our Rotary Cutter Gearbox vs. Low-Quality Alternatives

Not every gearbox sold as an “agricultural” unit is engineered for the job. The dimensions below compare the EP31 class build to the typical low-cost imported alternative.

Vanliga frågor

Common questions from buyers evaluating the EP31 for their fleet or implement build. If your situation is not covered, send us the details and we will respond within one working day.

Customer Feedback from the Field

Selected feedback from operators using the EP31 or related units in commercial rotary cutter / brush cutter duty across multiple countries. Names are anonymized using city + initials for privacy.

Companion Products & Drivetrain Accessories

A rotary cutter gearbox usually sits in the middle of a longer drivetrain. The items below complete the typical agricultural power-transmission package.

Certifications & Quality Standards

• ISO 9001:2015 — Quality management system covering design, manufacturing, and inspection processes.
• ISO 6336 — Reference standard for the load-capacity calculation of cylindrical and bevel gears.
• DIN 3960 / DIN 3961 — Tooth profile and accuracy class definitions used for gear quality grading.
• EN ISO 11684 — Pictorial safety signs and warning marks for agricultural machinery.
• CE-märkning — Conformity with the EU Machinery Directive 2006/42/EC where applicable.
• AS 4024 — Australian machinery safety framework — referenced for OEM units bound for AU farms.
• Material certification — Mill certificates for gear and shaft alloys; hardness, composition, and metallographic data on file per batch.

Outgoing Inspection Workflow

Each batch passes through: incoming raw-material inspection → forging and machining first-article check → heat-treatment hardness sample test → gear-accuracy measurement on Klingelnberg-class testers → assembly torque verification → no-load run-in and acoustic record → final visual and packaging check. Inspection records travel with the carton.

Notes for Australian Buyers

Units shipped into Australia for use on commercial farms should be reviewed against the relevant state WHS (Work Health and Safety) requirements and the rotary cutter gearbox fitted with all guards specified by the implement OEM. Common search terms used by Australian buyers include agricultural gearbox Australia, farm gearbox supplier Australia, Queensland tractor parts, NSW farm equipment, and Victoria agricultural machinery — let us know your state and intended implement and we will recommend the matching configuration.

Why Buy from Us — Factory & Brand Strength

Factory background

We have been manufacturing agricultural gearboxes including the rotary cutter gearbox family at our facility for over a decade. The plant covers a substantial machining and assembly area with dedicated heat-treatment, gear-cutting, gear-grinding, and final-assembly bays, and a year-round skilled workforce in production and quality.

Production capability

Annual capacity covers tens of thousands of units across the catalogue. Critical equipment includes CNC gear-hobbing centres, CNC gear-grinders, sealed-quench heat-treatment furnaces, three-coordinate measuring machines (CMM), gear-tooth contact testers, and dedicated run-in test stands. Tooling and dies for the most popular models are kept on standby to cut response time on repeat orders.

Export footprint

We currently export to dozens of countries, with primary markets in Australia, North America, Europe, and Southeast Asia. Common search terms used by international buyers include agricultural gearbox manufacturer China, custom farm gearbox supplier, and OEM gearbox factory — and our sales team is set up to handle drawing reviews and technical conversations in English.

OEM / ODM capability

Our standard custom flow is: drawing or sample submission → engineering review and quote → 3D model and prototype tooling sign-off → first-article sample → small pilot batch → serial production. Lead times for new tooling typically run 30–60 days; repeat builds run inside 20–30 days.

MOQ & lead time

Standard catalogue models: MOQ from one carton (5–50 units depending on size). Custom builds: typical MOQ 50 units. Standard lead time 7–15 days for stock items, 30–45 days for custom first runs.

Quality control

Each batch passes through ISO 9001:2015 governed inspection, raw-material composition and hardness testing, in-process gear accuracy verification, final assembly torque sign-off, and a 30-minute no-load run-in test recorded per unit.

After-sales

12-month standard warranty on workmanship; extended warranty for OEM contracts. Technical email response inside 24 hours, and replacement parts dispatched within working days for valid warranty cases.

Ready to spec your fleet?

Tell us your tractor model, implement type, and quantity needed — we will respond inside 24 hours with a quote and lead time.

We do more than supply standard agricultural gearboxes. Bring us your drawings, samples, or even a rough sketch — our engineering team will design and manufacture a precision gearbox solution tailored to your exact application.