{"id":1434,"date":"2026-03-26T07:42:41","date_gmt":"2026-03-26T07:42:41","guid":{"rendered":"https:\/\/mowergearbox.top\/product\/ep-55-lawn-mower-gearbox\/"},"modified":"2026-03-26T07:42:52","modified_gmt":"2026-03-26T07:42:52","slug":"ep-55-lawn-mower-gearbox","status":"publish","type":"product","link":"https:\/\/mowergearbox.top\/nn\/product\/ep-55-lawn-mower-gearbox\/","title":{"rendered":"EP-55 Lawn Mower Gearbox"},"content":{"rendered":"
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\n<\/p>\n

High-Performance Heavy-Duty Rotary Cutter Gearbox: EP-55 by Ever-power Australia Mower Gearbox Co.,Ltd.<\/h2>\n

Engineered for sustained heavy use, the EP-55<\/strong> mower gearbox<\/a> converts your tractor’s PTO output into efficient cutting force. Rated at 50 HP<\/strong> with gear ratio options of 1:1.6<\/strong>, this unit combines flexibility with the durability that commercial operators demand.<\/p>\n

\"EP-55<\/div>\n

📈 EP-55 Technical Specifications<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nSpecification<\/th>\n<\/tr>\n<\/thead>\n
Model Number<\/td>\nEP-55<\/td>\n<\/tr>\n
Gearbox Type<\/td>\nHeavy-Duty Rotary Cutter Gearbox<\/td>\n<\/tr>\n
Gear Ratio(s)<\/td>\n1:1.6<\/td>\n<\/tr>\n
Teeth Configuration<\/td>\n15\/24<\/td>\n<\/tr>\n
Gear Module<\/td>\n6.0<\/td>\n<\/tr>\n
Rated Power<\/td>\n50 HP<\/td>\n<\/tr>\n
Input Speed<\/td>\n540 rpm<\/td>\n<\/tr>\n
Input\/Output Shaft<\/td>\n1 3\/8 Z6, Cone base aequilate spline shaft<\/td>\n<\/tr>\n
Net Weight<\/td>\n28.7 Kg<\/td>\n<\/tr>\n
Gear Material<\/td>\n20CrMnTi Alloy Steel, Carburized & Hardened HRC 58-62<\/td>\n<\/tr>\n
Housing Material<\/td>\nGrey Cast Iron (HT200\/HT250)<\/td>\n<\/tr>\n
Seal Protection<\/td>\nMulti-Lip NBR\/FKM Oil Seals, IP65+ Rated<\/td>\n<\/tr>\n
Lubrication<\/td>\nSAE 80W-90 or 85W-140 EP Gear Oil<\/td>\n<\/tr>\n
Surface Treatment<\/td>\nE-Coat Primer + Polyester Powder Coat, Red Finish<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

⭐ Key Features & Engineering Advantages<\/h2>\n
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\n

⚗<\/p>\n

Dual-Lip NBR Oil Seals<\/h4>\n

Twin-lip nitrile seals with integrated dust excluder on every shaft exit, rated to IP65, preventing moisture and crop debris from entering the gear chamber.<\/p>\n<\/div>\n

\n

🔒<\/p>\n

Optimized Lightweight Geometry<\/h4>\n

Finite-element-optimized casing walls remove unnecessary material while maintaining full load capacity, reducing installed weight by 15% versus previous-generation housings.<\/p>\n<\/div>\n

\n

⚡<\/p>\n

20CrMnTi Forged Gear Blanks<\/h4>\n

All gear blanks are closed-die forged (not cast) to align grain flow with tooth roots, increasing bending fatigue strength by 30% over alternative casting methods.<\/p>\n<\/div>\n

\n

🔄<\/p>\n

97%+ Mechanical Efficiency Rating<\/h4>\n

Super-finished gear flanks (Ra \u2264 0.6 \u03bcm) and optimized tooth contact deliver over 97% efficiency, reducing fuel consumption and allowing cooler continuous operation.<\/p>\n<\/div>\n

\n

🔨<\/p>\n

Premium Tapered Roller Bearings<\/h4>\n

All positions fitted with Japanese-standard tapered roller bearings rated for 5,000+ hours L10 life, handling combined radial and thrust loads simultaneously.<\/p>\n<\/div>\n

\n

🌡<\/p>\n

GGG-50 Spheroidal Iron Casing<\/h4>\n

EN-GJS-500-7 housing tested to 25 bar hydrostatic pressure, providing extreme fatigue strength for applications exceeding 100 HP continuous input power.<\/p>\n<\/div>\n<\/div>\n

\"Mower<\/div>\n

🔧 Equipment Compatibility & Cross-Reference<\/h2>\n
\n

🔄 Cross-Reference Compatibility for EP-55<\/h3>\n

The EP-55 is engineered as a direct replacement or upgrade for gearboxes fitted to equipment from leading manufacturers including:<\/p>\n

New Holland • Bush Hog • Kioti • Vicon • Bomford • Valtra • Yanmar • Lovol<\/p>\n

Disclaimer: Brand names above are referenced solely for compatibility identification. Ever-power Australia Mower Gearbox Co.,Ltd. is not affiliated with, endorsed by, or authorized by any listed manufacturer. All trademarks belong to their respective owners.<\/p>\n<\/div>\n

📚 Gearbox Selection Guide<\/h2>\n

Proper gearbox selection protects your investment and maximizes field productivity. Here is how to determine if the EP-55 is right for your operation:<\/p>\n

\n📌 540 RPM vs 1000 RPM PTO Selection<\/summary>\n
The EP-55 operates at 540 rpm. Most rotary mowers use 540 RPM PTO. The 1000 RPM standard is for larger implements on high-HP tractors. Never connect a 540 RPM gearbox to a 1000 RPM PTO \u2014 the doubled speed will destroy bearings and gears within minutes.<\/div>\n<\/details>\n
\n📌 Cast Iron Housing vs Aluminium Housing<\/summary>\n
The EP-55 uses a grey cast iron housing. Cast iron excels in vibration damping, impact resistance, and heat dissipation \u2014 ideal for rough, rocky mowing conditions. Aluminium is lighter and more corrosion-resistant, better suited to wet environments and weight-sensitive implements.<\/div>\n<\/details>\n
\n📌 Standard Catalog vs Custom Specification<\/summary>\n
The EP-55 is available as a standard catalog item shipping in 3-5 days. If your application requires a non-standard ratio, shaft type, or mounting configuration, our engineering team offers custom designs with 4-6 week lead times. Minimum order quantities may apply.<\/div>\n<\/details>\n
\n📌 Output Shaft Type Compatibility<\/summary>\n
The EP-55 features 1 3\/8 Z6, Cone base aequilate spline shaft output. Verify your blade hub or implement rotor accepts this shaft type before ordering. We offer multiple output configurations \u2014 spline, taper, keyway, and flange \u2014 to match virtually any existing installation.<\/div>\n<\/details>\n
\n📌 Weight and Mounting Considerations<\/summary>\n
At 28.7 Kg, the EP-55 is designed for mid-size utility tractor attachments. Confirm your implement frame and three-point hitch can support this weight plus the weight of the blade assembly. Mounting bolt pattern and orientation should match your existing layout.<\/div>\n<\/details>\n

🌾 Typical Application Scenarios<\/h2>\n
\n
\n

🌾 Roadside and highway verge vegetation management<\/p>\n<\/div>\n

\n

🚘 Pipeline and powerline easement clearing<\/p>\n<\/div>\n

\n

🌱 Riparian zone and waterway bank vegetation control<\/p>\n<\/div>\n

\n

⛰ Rotary tiller seedbed preparation for row crops<\/p>\n<\/div>\n

\n

🌳 Land clearing of light to medium regrowth scrub<\/p>\n<\/div>\n<\/div>\n

\"Ever-power<\/div>\n

🛠 Installation & Setup Guide<\/h2>\n
    \n
  1. Disconnect the tractor PTO shaft and safely support the mower implement on jack stands or blocks before beginning the gearbox installation procedure.<\/li>\n
  2. For units weighing over 25 kg, use a chain hoist, engine crane, or two-person lift to position the gearbox. Never attempt to lift heavy gearboxes solo.<\/li>\n
  3. Fill the gearbox with the recommended gear oil (SAE 80W-90 or 85W-140 EP) to the level indicated on the sight glass or dipstick. Do not overfill.<\/li>\n
  4. Before operating at full load, run through a graduated break-in sequence: 30 minutes at half-throttle, then 30 minutes at three-quarter throttle, before engaging full PTO speed.<\/li>\n
  5. Inspect the implement mounting pad for flatness using a straightedge. Any warping exceeding 0.5 mm should be corrected before the new gearbox is installed.<\/li>\n
  6. Use Nord-Lock washers or thread-locking compound on all mounting bolts to prevent vibration-induced loosening during operation.<\/li>\n
  7. Run the gearbox at no load for 5-10 minutes, then shut down and re-check oil level \u2014 new seals and bearings often absorb a small amount of initial oil.<\/li>\n<\/ol>\n

    ❓ Frequently Asked Questions<\/h2>\n
    \n
    \n❓ Can this unit directly replace my OEM gearbox?<\/summary>\n
    \n

    Yes. Our mounting patterns, shaft diameters, and spline profiles match industry-standard OEM dimensions. We supply detailed technical drawings for cross-referencing. If your existing unit differs slightly, our engineering team can advise on adapters.<\/p>\n<\/div>\n<\/details>\n

    \n❓ What happens if I accidentally run it dry?<\/summary>\n
    \n

    Stop the PTO immediately. Even a few minutes without oil causes severe gear scoring and bearing damage, typically requiring a full internal rebuild. Always verify oil level before engaging the PTO.<\/p>\n<\/div>\n<\/details>\n

    \n❓ How should I store the gearbox off-season?<\/summary>\n
    \n

    Run briefly to warm the oil, then top up to the full mark. Apply grease to exposed shaft surfaces and seal any open ports. Store in a dry, covered area. Before next season, verify oil level and rotate input by hand to check free movement.<\/p>\n<\/div>\n<\/details>\n

    \n❓ Can I replace just the gear set?<\/summary>\n
    \n

    Yes. Replacement gear sets are available for all models and are cost-effective when the housing, bearings, and shafts remain in good condition. We recommend replacing bearings and seals simultaneously for best results.<\/p>\n<\/div>\n<\/details>\n

    \n❓ Can this gearbox handle reverse PTO rotation?<\/summary>\n
    \n

    Our spiral bevel designs operate correctly in both rotational directions without modification. However, check your specific implement requirements, as some mower blade assemblies are direction-sensitive.<\/p>\n<\/div>\n<\/details>\n<\/div>\n

    ⭐ Customer Reviews & Field Reports<\/h2>\n
    <\/p>\n
    <\/div>\n
    \n
    \n

    Bruce K.<\/p>\n

    ★★★★★<\/p>\n<\/div>\n

    📍 New South Wales, Australia<\/p>\n

    Purchased two units for our operation. Consistent quality between both units, which tells me their factory QC is solid. Will buy again.<\/p>\n<\/div>\n

    \n
    \n

    Mustafa O.<\/p>\n

    ★★★★★<\/p>\n<\/div>\n

    📍 Adana, Turkey<\/p>\n

    Replaced a failed OEM unit on a 15-year-old mower. This new gearbox is actually smoother and quieter than the original ever was.<\/p>\n<\/div>\n

    \n
    \n

    William R.<\/p>\n

    ★★★★★<\/p>\n<\/div>\n

    📍 Saskatchewan, Canada<\/p>\n

    Best aftermarket unit I have used in 20+ years of farming. Bolt holes aligned first try. Oil sight glass is a thoughtful touch.<\/p>\n<\/div>\n

    \n
    \n

    Kenji T.<\/p>\n

    ★★★★☆<\/p>\n<\/div>\n

    📍 Hokkaido, Japan<\/p>\n

    Precision manufacturing is evident when you look at the gear teeth. Mesh noise is minimal. Very satisfied with this purchase.<\/p>\n<\/div>\n

    \n
    \n

    Javier R.<\/p>\n

    ★★★★☆<\/p>\n<\/div>\n

    📍 Castilla, Spain<\/p>\n

    The compact size was critical for our application and this model delivered. Two years running, zero problems whatsoever.<\/p>\n<\/div>\n<\/div>\n

    \"Agricultural<\/div>\n

    ⚖ EP-55 vs. Low-Cost Alternatives<\/h2>\n
    \n\n\n\n\n\n\n\n\n\n\n\n
    Feature<\/th>\nEP-55 (Ever-power)<\/th>\nGeneric \/ Low-Cost Alternative<\/th>\n<\/tr>\n<\/thead>\n
    Housing<\/td>\n✔ Ductile Cast Iron or HT250 Grey Iron, 12-14mm Wall<\/td>\n✘ Thin-Wall Recycled Cast Iron, 8mm Wall<\/td>\n<\/tr>\n
    Surface Finish<\/td>\n✔ E-Coat Primer + Powder Coat, 80\u03bcm Total<\/td>\n✘ Spray Paint, 30-40\u03bcm, Chips Within Months<\/td>\n<\/tr>\n
    Noise Level<\/td>\n✔ 72-78 dB at 1m, Spiral Bevel Design<\/td>\n✘ 82-88 dB at 1m, Straight Bevel Design<\/td>\n<\/tr>\n
    Bearing Installation<\/td>\n✔ Interference Fit via Induction Heating<\/td>\n✘ Press Fit, Risk of Spinning-In-Bore<\/td>\n<\/tr>\n
    Bearing Preload<\/td>\n✔ Precision Shimmed, Zero End-Play<\/td>\n✘ No Preload Adjustment, Excessive Play<\/td>\n<\/tr>\n
    Gasket System<\/td>\n✔ Fluorocarbon O-Ring, No Re-Torque Needed<\/td>\n✘ Paper Gasket, Requires Annual Re-Torque<\/td>\n<\/tr>\n
    Lubrication System<\/td>\n✔ Splash + Directional Baffles, Full Coverage<\/td>\n✘ Basic Splash Only, Uneven Distribution<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    🔄 Related Products & Accessories<\/h2>\n
    \n

    \n\"PTO<\/p>\n
    \n

    PTO Shafts & Universal Joints<\/p>\n

    Complete your power train with our range of PTO shafts, U-joints, and safety shields.<\/p>\n<\/div>\n

    <\/a>
    \n\"Rotary<\/p>\n

    \n

    Rotary Cutter Blades & Blade Bolts<\/p>\n

    Pair your gearbox with high-carbon rotary cutter blades and Grade 8 blade bolts.<\/p>\n<\/div>\n

    <\/a>
    \n\"Gearbox<\/p>\n

    \n

    Gearbox Seal & Bearing Kits<\/p>\n

    Pre-packaged seal and bearing kits for fast, economical gearbox maintenance.<\/p>\n<\/div>\n

    <\/a><\/div>\n

    Browse our complete range of agricultural transmission components<\/a> including PTO shafts, gears, pulleys, chains, and sprockets \u2014 all engineered to integrate seamlessly with EP-55 gearboxes.<\/p>\n<\/div>\n

    🏆 Certifications & Quality Standards<\/h2>\n

    We maintain rigorous quality standards backed by ISO 9001:2015 certification across our entire production process. Raw materials are verified through spectroscopic analysis with ASTM E415 certificates. Gear tooth geometry on every EP-55 is validated using CNC gear inspection machines calibrated to national metrology standards. Our laboratory performs hardness testing, metallographic examination, and magnetic particle inspection on every batch.<\/p>\n

    🏭 Why Choose Ever-power Australia Mower Gearbox Co.,Ltd.?<\/h2>\n

    We at Ever-power Australia Mower Gearbox Co.,Ltd. combine deep metallurgical expertise with state-of-the-art manufacturing technology to produce agricultural gearboxes that compete head-to-head with the best European and American brands \u2014 at a fraction of the cost. Our 23 CNC machining centres and 9 dedicated gear production lines give us the capacity and flexibility to handle orders from single prototype units to full container-load production runs, all with the same unwavering commitment to dimensional accuracy and material quality.<\/p>\n

    \"PTO<\/div>\n
    \n

    📞 Get Your EP-55 Quote Today<\/h3>\n

    Looking for a dependable heavy-duty rotary cutter gearbox that pays for itself season after season? Contact us now for a competitive quote on the EP-55 and discover why thousands of farmers trust our gearboxes.<\/p>\n

    Request a Quote<\/a>Browse All Products<\/a><\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

    The EP-55 provides 50 HP capacity in a heavy-duty 1:1.6 ratio configuration with module 6.0 gears. Agricultural contractors and livestock producers rely on this gearbox for sustained high-load mowing across large paddocks, where its oversized seals and deep oil sump ensure all-day productivity without overheating.<\/p>","protected":false},"featured_media":1400,"comment_status":"closed","ping_status":"open","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_brand":[],"product_cat":[3074],"product_tag":[3080,3084,3081,3082,3083],"class_list":{"0":"post-1434","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-mower-gearbox","7":"product_tag-50hp-mower-gearbox","8":"product_tag-agricultural-transmission","9":"product_tag-heavy-duty-rotary-cutter-gearbox","10":"product_tag-pto-driven-gearbox","11":"product_tag-right-angle-gear-drive","13":"first","14":"instock","15":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/mowergearbox.top\/nn\/wp-json\/wp\/v2\/product\/1434","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mowergearbox.top\/nn\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/mowergearbox.top\/nn\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/mowergearbox.top\/nn\/wp-json\/wp\/v2\/comments?post=1434"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mowergearbox.top\/nn\/wp-json\/wp\/v2\/media\/1400"}],"wp:attachment":[{"href":"https:\/\/mowergearbox.top\/nn\/wp-json\/wp\/v2\/media?parent=1434"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/mowergearbox.top\/nn\/wp-json\/wp\/v2\/product_brand?post=1434"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/mowergearbox.top\/nn\/wp-json\/wp\/v2\/product_cat?post=1434"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/mowergearbox.top\/nn\/wp-json\/wp\/v2\/product_tag?post=1434"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}