EP-966109 Rotary Cutter Gearbox – 60HP, Dual Input Z6 & Z20, Dual Output Optic & Taper Spline

EP-966109 Rotary Cutter Gearbox 1

★ The Universal 60HP Gearbox — EP-966109 Accepts Z6 or Z20 PTO Input, Connects to Optic Axis or Taper Spline Output, All from One 29kg Housing

Le EP-966109 is the only gearbox in the EP range that combines four interface options in a single unit: 1 3/8″ Z6 input (standard Korean and Japanese PTO) et 3/4″ Z20 input (European compact tractor PTO) on the input side; optic axis et taper spline on the output side. Two ratio options: 1:1.46 at M7.0 (the coarsest gear module in the 60HP EP range) and 1:1.93 at M5.5. At 207.5mm total housing width — the widest housing in the EP rotary cutter series — and 29kg, it carries all four interfaces within a single GGG50 casting that supports the 60HP gear mesh. Korea Ever-Power supplies the EP-966109 to rotary cutter OEM manufacturers, importers of European tractors, and commercial mowing operations across South Korea, Japan, and Southeast Asia.

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The Four-Interface Problem — Why the EP-966109 Exists

EP-966109 rotary cutter gearbox 60HP dual input Z6 Z20 dual output optic taper spline Korea Ever-Power

EP-966109 · 207.5mm wide · All four interfaces in one housing

Across Asia-Pacific agricultural markets, 60HP rotary cutter operations encounter four distinct drive interface combinations — and historically each combination required a different gearbox SKU:

Z6 input + Optic axis output: Standard Korean/Japanese tractor with optic axis cross-shaft disc mower. The most common combination in Korea.
Z6 input + Taper spline output: Standard Korean/Japanese tractor with taper spline blade carrier cutter deck.
Z20 input + Optic axis output: European compact tractor (SAME, Lamborghini, McCormick) with optic axis cutter deck — requiring a Z20 PTO interface that standard Korean gearboxes cannot accommodate.
Z20 input + Taper spline output: European compact tractor with taper spline blade carrier cutter — the rarest combination but present in mixed-fleet commercial operations in Korea and Japan.

Before the EP-966109, servicing all four combinations required stocking (or ordering) different gearboxes. The EP-966109 resolves this with a single housing that provides all four interface options simultaneously — active only one input and one output at any given installation, but capable of serving any combination without modification.

Replacement reference: The EP-966109 is engineered to match specifications of comparable Comer Industries, Bondioli & Pavesi, and Brevini 60HP rotary cutter gearboxes with dual-input (Z6/Z20) and dual-output (optic/taper) configurations. Korea Ever-Power is not affiliated with these brands. References are for specification matching only.

Technical Specifications — Both Ratio Configurations

EP-966109 Rotary Cutter Gearbox Dimension

Paramètre Config A · 1:1.46 Config B · 1:1.93
Rapport de vitesse 1 : 1.46 1 : 1.93
Teeth Count 13 / 19 14 / 27
Module d'engrenage 7.0 ← coarsest in EP 60HP range 5.5
Puissance nominale 60 HP — both configurations
Vitesse d'entrée nominale 540 tr/min
Blade Shaft RPM (at 540) ≈ 370 RPM ≈ 280 RPM
Input Shafts 1 3/8″ Z6 (ISO 500 — Korean, Japanese, standard global PTO)
3/4″ Z20 (European compact tractor PTO standard)
One active at a time — the other capped during operation
Output Shafts Optic axis ×1 — plain round shaft
Taper spline ×1 — self-tightening tapered engagement
One active at a time — the other capped during operation
Housing Width 207.5mm — widest in EP rotary cutter series
Housing Dimensions 108 × 207.5 mm footprint · H 152.5 mm
Matériau du boîtier Nodular cast iron GGG50
Poids net 29 kg

agricultural gearbox features 1

The 207.5mm housing width — compared to 108.5mm on the EP-RC61 at the same 60HP rating — is the direct consequence of accommodating the Z20 input alongside the Z6 input. Both input shaft bearings must be positioned within the housing walls with adequate bearing span for 60HP torque transmission, and neither bearing seat can compromise the structural wall sections of the other. The additional 99mm of housing width provides this spatial separation while maintaining the gear mesh geometry at the 90° intersection of the input shaft and output shaft axes.

The 152.5mm housing height is notably compact relative to the 207.5mm width — the design keeps the centre of gravity low relative to the cutter deck mounting face, which is important for compact 60HP tractors where a tall top-heavy gearbox would increase the implement's pitch sensitivity on sloped terrain. The 100mm and 70.3mm dimensions in the engineering drawing correspond to the two output shaft stub lengths — the longer optic axis stub and the shorter taper spline stub — both exiting from the same side of the housing output face.

The 3/4″ Z20 Input — European Compact Tractor PTO Compatibility Explained

The 3/4″ Z20 spline is a compact-diameter PTO standard used on a specific category of European compact tractors — particularly those from Italian manufacturers including SAME Deutz-Fahr, Lamborghini Trattori, and certain McCormick compact models, as well as some Fendt compact variants. This standard uses a smaller shaft diameter (3/4 inch versus 1 3/8 inch of the Z6) with 20 finer spline teeth rather than 6 coarser ones, resulting in a smaller engagement cross-section optimised for the tighter package dimensions of compact tractor rear PTO assemblies.

1 3/8″ Z6 — Standard Agricultural PTO

ISO 500 · 1.375 inch shaft · 6 coarse spline teeth

The global standard for agricultural PTO implements — used on virtually all Korean tractors (Daedong, LS, TYM, Kumsung), Japanese tractors (Kubota, Yanmar, Iseki), American tractors (John Deere, CNH), and the majority of European tractors above 40HP. The EP-966109's Z6 input socket accepts standard agricultural PTO drive shafts directly.

3/4″ Z20 — European Compact Tractor PTO

0.75 inch shaft · 20 fine spline teeth · European compact standard

Used on SAME Deutz-Fahr Frutteto and Solaris series, Lamborghini Vikon and Nitro compact models, certain McCormick X4 compact variants, and other European compact tractors in the 40–65HP class where the smaller PTO shaft diameter matches the tighter rear axle design. A Z6 PTO drive shaft will not physically engage a Z20 socket — an EP-966109 is required to connect a Z20 tractor to a standard rotary cutter implement.

Korean and Japanese market context for Z20: The Z20 input is relevant in Korea and Japan primarily through the growing number of European compact tractors imported for specialty farming applications — orchard and vineyard management in particular. Korean importers of SAME and Lamborghini compact tractors, Japanese Fendt and Deutz-Fahr dealers, and Southeast Asian distributors of European compact agricultural equipment all encounter the Z20 PTO interface when their customers want to attach standard rotary cutter implements. The EP-966109 is the solution — without requiring a separate adapter shaft or housing modification.

M7.0 at 1:1.46 — Why the EP-966109 Uses the Coarsest Module in the EP 60HP Range

The EP-RC61 uses M7.0 for its 1:1.46 ratio — and the EP-966109 matches this specification exactly for the same ratio. But the context that makes M7.0 specifically significant in the EP-966109 is the Z20 input side: at 3/4 inch shaft diameter, the Z20 input shaft is substantially smaller than the Z6 input shaft, which means the input bevel gear on the Z20 side must be designed for the smaller shaft geometry. At 60HP input through this smaller shaft, the bevel gear tooth forces are concentrated on a gear set that cannot benefit from the Z6 shaft's larger cross-section. The M7.0 coarse module compensates by ensuring each tooth contact event distributes the 60HP load across a large enough tooth face area — the load-per-unit-area criterion that determines whether sustained operation stays within the fatigue limit.

M7.0 vs M5.5 within the same housing: Config A (1:1.46, 13/19 teeth, M7.0) uses the coarser module because at the lower reduction ratio, the output gear carries higher torque-per-tooth, demanding a larger tooth section. Config B (1:1.93, 14/27 teeth, M5.5) uses a finer module because the deeper reduction distributes the output torque across more simultaneous tooth contacts (14-tooth pinion drives a 27-tooth crown gear, engaging more tooth pairs simultaneously than 13/19). The housing accommodates both gear sizes within the 207.5mm width — the wider housing that was necessary for the dual Z6/Z20 input design simultaneously provides the space needed to fit both the large M7.0 gear set and the M5.5 set in their respective ratio positions.

Interface Compatibility Matrix — Which Combination Is Your Installation?

Identify your tractor's PTO shaft type and your cutter deck's blade carrier hub type, then connect the corresponding EP-966109 interfaces:

Tractor PTO Shaft Blade Carrier Hub Active Input Active Output Typical machine
Z6 (1 3/8″) Axe optique Z6 side Optic side Standard Korean/Japanese tractor + optic axis cutter deck
Z6 (1 3/8″) Cannelure conique Z6 side Taper spline side Standard Korean/Japanese tractor + taper spline cutter deck
Z20 (3/4″) Axe optique Z20 side Optic side European compact tractor (SAME, Lamborghini) + optic axis cutter
Z20 (3/4″) Cannelure conique Z20 side Taper spline side European compact tractor + taper spline cutter — mixed-fleet commercial operations

Installation rule: Cap the inactive input and the inactive output before operating. Both inactive shafts rotate continuously when the gearbox runs — the caps protect the seals from soil and moisture ingress at the inactive shaft exit points. Switching between combinations (e.g. from Z6/optic to Z20/taper spline) requires: (1) stopping the tractor and fully disengaging PTO, (2) swapping the active PTO shaft, (3) swapping the active blade carrier, (4) refitting the caps on the newly inactive shafts. No internal modification or disassembly of the gearbox is required for any of the four combinations.

EP-966109 in the 60HP EP Range — Choosing Between Universal and Dedicated Models

Modèle HP Input(s) Output(s) Poids Choose when
EP-RC61 60 Z6 only Cannelure conique 36.5 kg Korean/Japanese Z6 tractor, taper spline deck, single interface combination
EP-RC61T 60 Z6 dual-side Cannelure conique 33.5 kg Z6 from either side, taper spline output, 4 ratio options including 1:1 direct drive
EP-966109 ← this page 60 Z6 + Z20 Optic + Taper 29 kg Z20 European tractor; mixed-fleet; workshop covering all 60HP interface combinations

Decision: if your tractor uses Z6 and your cutter uses taper spline — EP-RC61 or EP-RC61T is the lean, purpose-built choice. If you have a Z20 European compact tractor, need optic axis output, manage mixed-fleet machines, or want one 60HP gearbox to cover any interface combination — EP-966109 is the specification.

Construction Quality

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207.5mm Wide Housing — Structural Necessity

The 207.5mm width is not excess material — it is the minimum dimension required to provide adequate bearing span for both the Z6 and Z20 input shaft bearings, maintain the gear mesh geometry at the 90° output shaft intersection, and retain housing wall thickness between all four interface positions without creating structural thin spots that would compromise the casting's impact resistance. Each interface position requires its own bearing seat, shaft exit bore, and seal housing, all of which must fit within the casting geometry without mutual interference.

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Inactive Interface Sealing

All inactive shafts — whether Z20 input, Z6 input, optic axis output, or taper spline output — rotate continuously during operation. Each inactive shaft exit is sealed with a machined plug and an oil seal behind it, creating both an oil retention barrier and an ingress protection layer. The plug design for the Z20 input is specifically dimensioned for the smaller 3/4-inch bore — not a generic cap but a precision-turned insert that maintains concentricity with the Z20 shaft and provides a seal contact diameter matching the Z20 shaft geometry.

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M7.0 Gear — Largest in EP 60HP Class

The M7.0 gear set in Config A (1:1.46) is the coarsest module used in any 60HP EP gearbox, including the EP-RC61 which also uses M7.0 at the same ratio. This is not coincidence — M7.0 at 60HP and 1:1.46 is the calculated optimum for this specific combination regardless of housing size. The EP-966109's wider housing gives the M7.0 gear set additional space for the larger pitch diameter without the tight clearances that would arise in a narrower housing at this module, allowing the full tooth face width to be used for load-bearing.

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100% Load Test at 60HP — Active Interface Verified

Every EP-966109 is tested at full 60HP rated load at the ordered ratio before dispatch. The test is conducted with the customer's ordered active input side connected (Z6 or Z20 as specified at order) and the ordered active output side loaded. This confirms that the specific shaft combination the customer will use has been validated at rated conditions — not assumed to be equivalent to testing a different interface combination on the same housing.

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Where the EP-966109 Is Used

lawn mower gearboxes application 1

🚜 European Compact Tractor Operators — Z20 PTO in Korean & Japanese Markets

Korean fruit farmers in Chungbuk and Jeonnam who have imported SAME Frutteto or Lamborghini Vikon compact tractors for orchard operations face a specific problem: their tractors have 3/4″ Z20 PTO shafts, but every Korean-market rotary cutter gearbox uses the 1 3/8″ Z6 standard. Without the EP-966109, they either need a purpose-built PTO adapter shaft (expensive, adds joint angles) or must import a European-spec gearbox (4–8 week lead time, high cost). The EP-966109 resolves this with a Korea Ever-Power product available in 3–5 days that accepts the Z20 shaft directly. For the growing community of European tractor operators in the Korean specialty crop market, this is the critical component that bridges European tractor and Korean implement standards.

🔧 Mixed-Fleet Commercial Contractors — One Gearbox for Every Tractor

Korean and Japanese commercial mowing contractors operating multiple machines — a mix of domestic Z6 tractors and imported European Z20 compact tractors — specify the EP-966109 as their standard gearbox across the 60HP class to simplify spare parts inventory. Rather than maintaining separate Z6-only and Z20-only gearbox stocks, a contractor with EP-966109 units covers every tractor in the fleet regardless of PTO standard. The dual output (optic and taper spline) further reduces the gearbox variant count by covering both blade carrier types with a single part number.

🏭 European Tractor Importers & Dealers — After-Sale Implement Support

Korean and Japanese dealers importing European compact tractors face a customer service challenge when buyers want to attach locally available rotary cutter implements that assume a Z6 input. Stocking EP-966109 units allows these dealers to offer a plug-and-play gearbox solution to their Z20 tractor customers — no adapter, no special PTO shaft, no European implement import required. The EP-966109 functions as the critical interface component in the European tractor × Korean implement ecosystem that these dealers operate in.

🌿 OEM Universal Rotary Cutter Manufacturing

Korean OEM rotary cutter manufacturers building machines for export to European markets — or for the Korean domestic market to be compatible with both domestic and imported European tractors — specify the EP-966109 as their 60HP input gearbox to achieve universal tractor compatibility from a single machine design. A cutter deck with an EP-966109 can be sold to buyers with Z6 Korean tractors and Z20 European tractors without modification, and with optic axis or taper spline blade carrier options, covering the full range of customer configurations from one production specification. Korea Ever-Power provides OEM pricing, dimensional drawings, and dedicated stock for the EP-966109.  application de boîte de vitesses agricole 1  

Why EP-966109 Operators Choose Korea Ever-Power

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207.5mm wide housing — four interface positions precision-machined in one casting

Korea Ever-Power Agricultural Machinery Co., Ltd. produces the EP-966109's M7.0 and M5.5 gear sets on the same CNC gear hobbing equipment used for the EP-RC61 series — the M7.0 gear specification is identical between these two 60HP models. The 207.5mm housing casting is machined on the same CNC machining centres as the narrower housings in the range, with all four interface bore positions (Z6, Z20, optic axis, taper spline) machined in the same setup to maintain concentricity and perpendicularity between axes. Precision-machining all four bores in one setup eliminates the alignment errors that would accumulate if each bore were machined separately.

For Korean and Japanese operators of European compact tractors — a growing market segment as SAME, Lamborghini, and Deutz-Fahr compact tractors gain traction in specialty crop farming — Korea Ever-Power's 3–5 day delivery eliminates the previously unavoidable long lead time of sourcing a Z20-compatible gearbox from European suppliers. This supply advantage makes the EP-966109 the practical solution for European tractor operators in Asia who want to connect locally available implements without waiting weeks for a European-spec component.

✔ Z20 3/4″ bore precision-machined to European compact PTO standard
✔ M7.0 and M5.5 gear sets — same spec as EP-RC61
✔ All 4 bores machined in one CNC setup — axis precision
✔ 100% load test at ordered active interface combination
✔ 3–5 day delivery — eliminates 4–8 week European lead time
✔ 19 years manufacturing — >95% export, RCEP compliant

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EP-RC61 / EP-RC61T — 60HP Z6 Dedicated

If your tractor is standard Z6 and you need taper spline output only, the EP-RC61 (2 ratios) or EP-RC61T (4 ratios) are the leaner, lighter options without the Z20 input. The EP-RC61T also includes the unique 1:1 direct drive ratio not available in the EP-966109.

🔩 Z20 PTO Drive Shafts

For European compact tractors using Z20 PTO, dedicated arbres de transmission de prise de force with 3/4″ Z20 tractor-end spline and standard Z6 implement-end (or full Z20 at both ends) are available — specify the correct tractor-end and implement-end configuration when ordering.

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Browse the complete boîte de vitesses de tondeuse à gazon range — EP-55, EP-RC31 through EP-RC81, EP-966109, and all LF, GS4RC, X30 series — for every rotary cutter input gearbox requirement from 20HP to 80HP.

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What Customers Say

Baek Chang-min Apple Orchard Operator · Yeongju, North Gyeongsang, South Korea · 2024

I run a SAME Frutteto 70 in my Yeongju apple orchard — it handles the steep slope and narrow row spacing better than Korean compact tractors I tried. The problem was always the Z20 PTO — none of the Korean rotary cutter gearboxes fit it directly. I was using a Z20-to-Z6 adapter shaft that added unwanted joint angles and vibration. When I found the EP-966109, I removed the adapter completely. The Z20 socket engages the SAME's PTO shaft directly with zero backlash — cleaner connection than I had with the adapter. The gearbox has been running two full orchard management seasons. No issues. Delivery from Korea Ever-Power to Yeongju was 4 days.

Song Min-young Agricultural Machinery Workshop · Andong, North Gyeongsang, South Korea · 2024

I service a mix of Korean and European tractors in the Andong area. In the past two years I've had three customers with SAME or Lamborghini compact tractors trying to connect Korean cutter decks — each one required a custom adapter or European gearbox order. I now stock two EP-966109 units. The next Z20 tractor customer walked in six weeks after I started stocking them. Z20 input, optic axis output — connected directly to the customer's existing Korean cutter deck. No adapter. Same-day repair instead of a two-week wait for a European order. The economics of stocking the EP-966109 were justified on that first use alone.

Rotary Cutter OEM · Export Division Gyeongnam Province, South Korea · 2024

We export compact rotary cutters to Italy and Germany. Our Italian distributor's customers use SAME and Lamborghini compact tractors; our German distributor's customers use Fendt and Deutz-Fahr — all with Z20 PTO outputs. Previously we exported a separate European-spec gearbox. Switching to EP-966109 for the export variant eliminated one gearbox SKU in our production — same cutter deck, same frame, just EP-966109 instead of EP-RC61. The Z20 side is connected for European customers; the Z6 side caps. Dual output (optic and taper) covers both Italian and German blade carrier preferences. Korea Ever-Power OEM lead time for export production is 5 days. We have been using EP-966109 in export production for 7 months.

Tanaka Shiro European Tractor Dealer · Nagano Prefecture, Japan · 2024

I import and sell Fendt and Deutz-Fahr compact tractors to grape and apple farmers in Nagano. The Z20 PTO compatibility issue comes up every time a customer wants to attach a locally available Japanese rotary cutter. I now include an EP-966109 in every machine sale as a standard accessory — it's the component that bridges my European tractors to Japanese implements. Korea Ever-Power delivers to Nagano in 5–6 days. Customers have been using the EP-966109 for one full season without any reported problems. The product solves a genuine market gap between European tractor standards and Japanese implement standards.

Frequently Asked Questions — EP-966109

How do I confirm whether my European compact tractor uses Z20 PTO?

Three ways: (1) Check the tractor operator's manual under PTO specifications — it will state the shaft diameter and spline count. (2) Measure the male PTO stub shaft diameter: if approximately 19mm (3/4 inch), it is Z20. If approximately 35mm (1 3/8 inch), it is Z6. (3) Count the spline teeth on the stub shaft — Z20 has 20 fine teeth; Z6 has 6 coarse teeth. SAME Frutteto, Lamborghini Vikon/Nitro, and most McCormick X4 compact models in the 40–65HP class use Z20. If uncertain, contact Korea Ever-Power with the tractor make, model, and year — we will confirm the PTO standard before you order.

Can the EP-966109 be used as a direct drop-in for an EP-RC61 on an existing cutter deck?

The gear ratio options (1:1.46 and 1:1.93) and the taper spline output are identical between the EP-966109 and the EP-RC61 where applicable. However, the housing footprint differs: EP-966109 is 207.5mm wide versus EP-RC61's narrower housing. The mounting bracket, frame clearances, and bolt pattern for the EP-966109 must be verified against the existing cutter deck frame before assuming direct substitution. Contact Korea Ever-Power with the existing EP-RC61 mounting dimensions for a compatibility confirmation. If frame modification is required, Korea Ever-Power can provide the EP-966109's mounting drawing.

Why is the EP-966109 lighter than the EP-RC61 (29kg vs 36.5kg) despite its wider housing?

The EP-966109 housing is wider (207.5mm vs approximately 108mm for the EP-RC61) but significantly shorter in height (152.5mm vs 182.5mm for the EP-RC61). The height reduction offsets more than the width increase in total casting volume. The EP-966109's housing wall geometry distributes the structural mass across the wider footprint with thinner wall cross-sections at non-critical faces, while the EP-RC61's taller housing concentrates structural mass in the bearing span area where the greatest structural rigidity is required for its single-input design. Different housing geometries serving different structural requirements at the same 60HP power class.

What gear oil and maintenance interval apply?

SAE 90 GL-4 gear oil — approximately 400–450ml. The EP-966109 ships without oil; fill before first operation. First change at 50 hours; subsequent changes every 200 hours or at the start of each mowing season. Check all four shaft seals (Z6, Z20, optic, taper) for weeping at each oil change — the inactive shaft seals are particularly worth monitoring, as they are less frequently inspected than the active seals but serve continuously during operation. Clear vegetation from around all shaft exits after each mowing session.

What warranty and shipping apply?

12-month warranty from dispatch against manufacturing defects. Not covered: use above 60HP, oil neglect, dry running before initial fill, damage from connecting an incompatible PTO shaft to either input socket. Specify the active input side at the time of order so the load test is conducted with the correct active configuration. Shipping: DHL or FedEx, 3–5 days to Korea and Japan, 5–7 days to SEA for 1–10 units; sea freight for larger orders (10–18 days). Full export documentation including Certificate of Origin for RCEP and ASEAN tariff applications on every shipment.

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