Mjenjač kardana rotacijske kosilice | Zamjena za Comer LF-140J

Pregled mjenjača kardana rotacijske kosilice

The LF140J is a mid-duty Mjenjač kardana rotacijske kosilice rated at 60 HP (44 kW) with a 1:1.93 speed-increasing ratio. At 540 RPM PTO input, the output shaft delivers approximately 1,042 RPM — the range most commercial rotary mower decks need for clean grass cutting at productive travel speeds. The GGG40 ductile cast iron housing weighs 28.5 kg and contains 1.4 litres of gear oil, making this a mid-weight unit positioned between the smaller aluminium-bodied mower gearboxes and the heavy-duty baler and tiller drives.

Ovo Mjenjač kardana is manufactured as a direct replacement for the Comer Industries LF-140J. The input shaft accepts the standard 1 3/8-inch, 6-spline (Z6) PTO coupling, and the output side features an ASA Z15 D.P. 8/16 sprocket-type shaft — a configuration common on multi-deck rotary mower systems where chain or sprocket drives transfer power from the main gearbox to individual cutting spindles. All mounting dimensions and bolt patterns match the original Comer design for direct installation.

Tehničke specifikacije

Verified performance data for this poljoprivredni mjenjač kardana. All values at standard 540 RPM input.

First oil change after 50 operating hours. Standard interval 500 hours thereafter.

Struktura i materijal

GGG40 Ductile Iron Housing

The LF140J housing is a two-piece split-case design in GGG40 ductile cast iron. This alloy grade provides a tensile strength of 400+ MPa with nodular graphite inclusions that give the material its characteristic ability to deform slightly under impact before cracking — a meaningful advantage over grey cast iron, which fractures under sudden shock loads. The housing halves are machined to tight flatness tolerances on the mating surface and sealed with an anaerobic gasket compound. The 1.4-litre oil reservoir is significantly larger than the 0.35-0.8 L capacity of smaller-frame gearboxes, reflecting the higher heat generation at 60 HP continuous duty.

Konfiguracija izlaznog vratila

The ASA Z15 sprocket output shaft is a distinctive feature of the LF-series mower gearboxes. Rather than a standard cylindrical or spline shaft, the output terminates in a sprocket tooth profile that directly engages with the mower deck's chain drive system. This eliminates the need for a separate sprocket coupling and reduces the number of potential wear points in the power path from Mjenjač kardana to cutting spindle. The sprocket teeth are induction-hardened to resist the abrasive wear that chain drives impose, particularly in dusty and debris-laden mowing environments.

Scenariji primjene

Commercial Rotary Mowing

The LF140J powers commercial-grade multi-spindle rotary mower decks used on large pastures, sports fields, and institutional grounds. The 1:1.93 ratio provides blade speeds of approximately 1,042 RPM — fast enough for a clean, mulching-quality cut on turf grass and meadow grass at travel speeds of 6-12 km/h. The 60 HP input capacity suits the mid-size utility tractors (45-60 HP) that Korean agricultural cooperatives and municipal grounds departments commonly operate.

Roadside and Park Maintenance

Provincial and municipal maintenance teams use wide-deck rotary mowers with this mjenjač kardana traktora for clearing road shoulders, park margins, and flood control levees. The chain-driven multi-spindle design cuts a wider swath per pass than single-blade rotary cutters, reducing the number of passes needed and saving fuel and operator time on large mowing contracts.

Operating Environment

Rotary mowing generates a continuous stream of grass clippings, dust, and small debris around the gearbox. The LF140J is designed for this environment — double-lip shaft seals on both input and output prevent contamination from entering the bearing cavity, and the breather vent is positioned on the top of the housing away from the worst of the debris spray. The 1.4-litre oil volume provides a thermal buffer during extended mowing sessions in summer heat (30-35 degrees Celsius ambient), where the gearbox may run at full 60 HP load for 4-8 hours per day during peak season. Operators should check the oil level before each shift and verify the breather vent is not plugged with grass clippings, which is a common cause of pressure buildup and subsequent seal failure on mower gearboxes.

Povezani i prateći proizvodi

Multi-deck rotary mowers place sustained loads on PTO driveshafts for hours at a time during commercial mowing operations. The driveshaft connecting your tractor to this Mjenjač kardana must be rated for 60 HP continuous duty with properly functioning universal joints and a full-length safety guard that meets local agricultural safety requirements. Korea Ever-Power manufactures matched Sklopovi kardanskog vratila specifically sized for mower service, including wide-angle configurations needed when the mower deck offsets significantly from the tractor centerline during turns.

For operators who run multiple types of tractor-mounted equipment, we carry a full line of replacement gearboxes covering rotary cutters, flail mowers, rotary tillers, hay tedders, round balers, feed mixers, fertilizer spreaders, and sprayer pump drives. Our poljoprivredni mjenjač catalogue includes over 400 models for Comer, Bondioli Pavesi, Omni Gear, and other major OEM brands. Sourcing all replacement gearboxes from one supplier means one account, one technical support contact, consistent quality, and lower combined shipping costs — practical advantages for cooperatives and equipment dealers managing large fleets.

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