{"id":2011,"date":"2026-03-23T08:50:26","date_gmt":"2026-03-23T08:50:26","guid":{"rendered":"https:\/\/ptogearbox.xyz\/product\/ep-650phd-post-hole-digger-pto-gearbox\/"},"modified":"2026-03-23T08:50:38","modified_gmt":"2026-03-23T08:50:38","slug":"ep-650phd-post-hole-digger-pto-gearbox","status":"publish","type":"product","link":"https:\/\/ptogearbox.xyz\/ja\/product\/ep-650phd-post-hole-digger-pto-gearbox\/","title":{"rendered":"EP-650PHD Post Hole Digger PTO Gearbox"},"content":{"rendered":"
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\n<\/p>\n

EP-650PHD Post Hole Digger PTO Gearbox \u2014 Precision PTO Gearbox for Agricultural Implements<\/h2>\n

When your agricultural implements require dependable torque delivery, the EP-650PHD Post Hole Digger PTO Gearbox stands ready. Featuring a hardened ductile cast iron body and precision-ground spiral bevel gears, this unit offers 2.92:1 gear ratio at 30HP capacity.<\/p>\n

\"EP-650PHD<\/p>\n

📋 EP-650PHD Technical Specifications<\/h3>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\u30d1\u30e9\u30e1\u30fc\u30bf<\/th>\nSpecification<\/th>\n<\/tr>\n<\/thead>\n
\u30e2\u30c7\u30eb<\/strong><\/td>\nEP-650PHD<\/td>\n<\/tr>\n
\u30ae\u30a2\u6bd4<\/strong><\/td>\n2.92:1<\/td>\n<\/tr>\n
Gear Teeth<\/strong><\/td>\n13\/38<\/td>\n<\/tr>\n
Gear Module<\/strong><\/td>\n4.25<\/td>\n<\/tr>\n
Rated Power (HP)<\/strong><\/td>\n30<\/td>\n<\/tr>\n
Rated Input Speed<\/strong><\/td>\n540 RPM<\/td>\n<\/tr>\n
Input\/Output<\/strong><\/td>\nOptic axis<\/td>\n<\/tr>\n
Gear Material<\/strong><\/td>\n20CrMnTi Alloy Steel, Carburized & Quenched (58-62 HRC)<\/td>\n<\/tr>\n
\u30cf\u30a6\u30b8\u30f3\u30b0\u6750<\/strong><\/td>\nDuctile Cast Iron<\/td>\n<\/tr>\n
Bearings<\/strong><\/td>\nTapered Roller Bearings<\/td>\n<\/tr>\n
Seals<\/strong><\/td>\nDouble-Lip NBR Oil Seals with Dust Excluder<\/td>\n<\/tr>\n
Net Weight<\/strong><\/td>\n24.1 kg<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

⭐ Key Features & Engineering Advantages<\/h3>\n
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🔧 Standard Auger Compatibility<\/h4>\n

Output shaft dimensions accommodate standard 2-inch hex and round auger bit connections used across major post hole digger and earth auger brands.<\/p>\n<\/div>\n

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💥 Thrust Bearing Protection<\/h4>\n

Oversized angular contact thrust bearings absorb the significant axial loads generated during deep boring (up to 1.5m depth), protecting gear mesh alignment and extending service life.<\/p>\n<\/div>\n

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🌡️ Field-Serviceable Design<\/h4>\n

Split housing construction with external drain and fill plugs allows lubricant changes and seal replacement in the field without removing the gearbox from the implement.<\/p>\n<\/div>\n

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📈 Multiple Mounting Options<\/h4>\n

Compatible with both Category I and Category II three-point hitch post hole digger frames with standard bolt patterns.<\/p>\n<\/div>\n

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⚙ High-Ratio Spiral Bevel Gears<\/h4>\n

20CrMnTi alloy steel gears with deep carburizing to 60+ HRC surface hardness provide the extreme torque multiplication (3:1 to 4:1) needed to bore through compacted soil, clay, and rocky substrates.<\/p>\n<\/div>\n

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🛡 Thick-Wall Cast Iron Housing<\/h4>\n

Heavy-gauge QT500-7 ductile cast iron body with reinforced flanges designed to absorb the cyclic thrust and radial loads generated during earth auger boring operations.<\/p>\n<\/div>\n<\/div>\n

🔄 Compatibility & Fitment Information<\/h3>\n

The EP-650PHD is designed with standard industry mounting dimensions and shaft specifications, making it a direct replacement for gearboxes found on many popular agricultural implements. Compatible implement brands include (referenced for cross-referencing purposes only \u2014 these are not trademark claims):<\/p>\n

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Danuser<\/span>
\nShaver<\/span>
\nLowe<\/span>
\nAuger Torque<\/span>
\nDigga<\/span>
\nMcMillen<\/span>
\nGeneral Equipment<\/span>
\nAgKNX<\/span>\n<\/div>\n

Disclaimer: Brand names are listed solely for cross-reference and compatibility identification. Ever-power Australia PTO Gearbox Co.,Ltd. is not affiliated with or endorsed by the above brands.<\/p>\n

🔎 Selection & Sizing Guide<\/h3>\n

Post hole digger gearbox selection depends on boring depth, soil type, and tractor PTO output. Here is a structured approach to selecting the EP-650PHD:<\/p>\n

\n⚙ Matching Gear Ratio to Application<\/summary>\n
\n

1:1 to 1:1.5 ratio<\/strong> \u2014 Minimal speed reduction; used when the implement blade\/tine speed should closely match PTO speed. Common for finishing mowers and light-duty applications.<\/p>\n

1:1.5 to 1:2 ratio<\/strong> \u2014 Moderate torque increase with proportional speed decrease. Suitable for standard rotary cutters, medium-duty mowers, and general-purpose implements.<\/p>\n

1:2.5 to 1:3+ ratio<\/strong> \u2014 High torque multiplication for heavy loads. Essential for rotary cultivators, post hole diggers, and brush cutters working in dense material.<\/p>\n<\/div>\n<\/details>\n

\n⚡ Matching Tractor HP to Gearbox Power Rating<\/summary>\n
\n

Always select a gearbox with a rated power (HP) equal to or greater than the maximum PTO output of your tractor. Running a gearbox beyond its rated power causes overheating, accelerated gear wear, and premature failure. As a best practice, maintain a 10-20% safety margin above your actual operating load.<\/p>\n<\/div>\n<\/details>\n

\n🔄 540 RPM vs 1000 RPM \u2014 Which PTO Speed?<\/summary>\n
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540 RPM PTO<\/strong> is the standard for most agricultural implements under 100HP. The EP-650PHD is designed for 540 RPM input. 1000 RPM PTO<\/strong> is used on higher-horsepower tractors (typically 75HP+) and requires a gearbox specifically rated for that speed. Do not connect a 540 RPM gearbox to a 1000 RPM PTO without a speed adapter.<\/p>\n<\/div>\n<\/details>\n

\n🛡 Aluminum vs Cast Iron Housing<\/summary>\n
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Aluminum<\/strong>: Best for compact tractors under 25HP, coastal\/humid environments, and applications where weight matters (finishing mowers, small rotary cutters). Excellent heat dissipation and corrosion resistance.<\/p>\n

Cast Iron<\/strong>: Required for medium-to-heavy duty applications above 25HP. Superior shock resistance and structural rigidity for brush cutting, heavy mowing, cultivating, and post hole digging.<\/p>\n<\/div>\n<\/details>\n

\n🔧 Standard vs Custom Gearbox<\/summary>\n
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Our standard models cover 90% of common agricultural gearbox applications with industry-standard mounting and shaft dimensions. For OEM manufacturers or unique implement designs requiring non-standard ratios, shaft configurations, or mounting patterns, we offer full custom manufacturing with MOQ as low as 50 units. Contact our engineering team<\/a> to discuss your custom requirements.<\/p>\n<\/div>\n<\/details>\n

🌱 Typical Application Scenarios<\/h3>\n

\"EP-650PHD<\/p>\n

\n
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Foundation Piling<\/h4>\n

Boring holes for light structural foundations, sign posts, and solar panel ground mounts.<\/p>\n<\/div>\n

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Soil Sampling<\/h4>\n

Deep soil core extraction for agronomic testing and environmental site assessment.<\/p>\n<\/div>\n

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Utility Pole Installation<\/h4>\n

Boring holes for power poles, telecommunications towers, and rural utility infrastructure.<\/p>\n<\/div>\n

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Fence Post Installation<\/h4>\n

Boring post holes for agricultural fencing across livestock properties and boundary perimeters.<\/p>\n<\/div>\n<\/div>\n

🛠 Installation & Setup Guide<\/h3>\n

Follow these steps to install the EP-650PHD on your implement. Always refer to the included instruction manual for model-specific torque values and safety precautions.<\/p>\n

    \n
  1. Attach the post hole digger frame to the tractor three-point hitch (Category I or II). Raise the frame and secure it in the vertical position.<\/li>\n
  2. Remove the old gearbox by unbolting the top flange from the digger frame. Support the gearbox weight during removal \u2014 pit digger gearboxes can weigh 19-59 kg.<\/li>\n
  3. Clean the frame mounting surface and inspect for cracks, worn bolt holes, or frame distortion.<\/li>\n
  4. Lift the new EP-650PHD gearbox into position and align the mounting bolt holes with the digger frame. Install bolts and torque to the specified value (typically 60-90 Nm).<\/li>\n
  5. Connect the PTO shaft to the gearbox input. Ensure the shear bolt is installed and spline engagement is complete.<\/li>\n
  6. Attach the auger bit to the output shaft. Verify the retaining pin or bolt is secure and the auger rotates freely without wobble.<\/li>\n
  7. Fill the gearbox with SAE 90 gear oil to the level plug. Lower the digger to the ground and run a test bore at low throttle to verify operation.<\/li>\n<\/ol>\n

    ❓ Frequently Asked Questions<\/h3>\n
    \n
    \nHow deep can I dig with this gearbox?<\/summary>\n
    \n

    Boring depth is limited by auger bit length, not the gearbox. Our gearboxes handle standard auger extensions for holes up to 1.5 meters deep in most soil types.<\/p>\n<\/div>\n<\/details>\n

    \nWhat causes the gearbox to stall during boring?<\/summary>\n
    \n

    Common causes: hitting solid rock or large roots, insufficient tractor PTO horsepower, dull auger bit teeth, or operating in waterlogged ground. Reduce feed pressure, sharpen or replace auger teeth, and ensure tractor HP matches the gearbox rated power.<\/p>\n<\/div>\n<\/details>\n

    \nWhat oil and maintenance does a pit digger gearbox need?<\/summary>\n
    \n

    Use SAE 90 or EP90 gear oil. Change after first 30 hours, then every 100 hours of boring operation. Inspect output shaft seal for soil ingress after every 20 boring hours and replace if worn.<\/p>\n<\/div>\n<\/details>\n

    \nWhat auger bit connection does the output shaft accept?<\/summary>\n
    \n

    Standard output accepts 2-inch (50.8mm) round shaft auger bits. Some models also offer hex output shaft options. Confirm your auger bit connection type before ordering.<\/p>\n<\/div>\n<\/details>\n

    \nCan I bore into rocky soil with this gearbox?<\/summary>\n
    \n

    Yes, within limits. Our pit digger gearboxes are designed for dense clay and moderate rock. For continuous boring in solid rock or heavily fractured stone, use our heavy-duty models (EP-01-084 or EP-2300058) rated at 50HP or above.<\/p>\n<\/div>\n<\/details>\n<\/div>\n

    💬 Customer Reviews & Field Reports<\/h3>\n
    \n
    \n
    \n\n<\/div>\n
    \n
    ★★★★☆<\/div>\n

    “Strong gearbox \u2014 bored through heavy Midwest clay without stalling. The 3:1 ratio provides excellent auger torque. Solid purchase.”<\/p>\n

    \u2014 Robert J.<\/span>, Kansas, USA<\/p>\n<\/div>\n

    \n
    ★★★★★<\/div>\n

    “We use this for tree planting in forest restoration projects. The high gear ratio and smooth output make it ideal for precise boring in mountain soils.”<\/p>\n

    \u2014 Yuki T.<\/span>, Nagano, Japan<\/p>\n<\/div>\n

    \n
    ★★★★★<\/div>\n

    “Replaced our worn-out digger gearbox and the difference is night and day. The EP unit boring through our laterite soil with much less vibration. Great product.”<\/p>\n

    \u2014 Willem D.<\/span>, Mpumalanga, South Africa<\/p>\n<\/div>\n

    \n
    ★★★★★<\/div>\n

    “We bore 500+ fence post holes per year on our cattle station. This gearbox chews through our red clay soil without breaking a sweat. Much better build than the brand it replaced.”<\/p>\n

    \u2014 Shane O.<\/span>, Western Australia, Australia<\/p>\n<\/div>\n

    \n
    ★★★★★<\/div>\n

    “Used for planting 2,000 olive trees. The gearbox handled the rocky Tuscan hillside soil perfectly. Very smooth operation and the output shaft seal kept all dirt out.”<\/p>\n

    \u2014 Marco B.<\/span>, Tuscany, Italy<\/p>\n<\/div>\n

    📈 EP-650PHD vs Economy Gearboxes \u2014 Head-to-Head Comparison<\/h3>\n

    Understanding the true value of the EP-650PHD requires examining how it outperforms budget gearboxes across critical engineering dimensions:<\/p>\n

    \n\n\n\n\n\n\n\n\n\n\n\n\n
    Feature<\/th>\nEP-650PHD (Ever-power)<\/th>\nEconomy Alternative<\/th>\n<\/tr>\n<\/thead>\n
    Gear Material<\/td>\n20CrMnTi Alloy Steel (58-62 HRC)<\/td>\n40Cr or plain carbon steel (45-50 HRC)<\/td>\n<\/tr>\n
    Heat Treatment<\/td>\nCarburizing + Quenching + Tempering<\/td>\nSurface hardening only<\/td>\n<\/tr>\n
    Housing<\/td>\nDuctile Cast Iron (tensile > 450 MPa)<\/td>\nGrey cast iron or recycled aluminum<\/td>\n<\/tr>\n
    Bearings<\/td>\nTapered roller bearings (major brand)<\/td>\nDeep groove ball bearings (unbranded)<\/td>\n<\/tr>\n
    Seals<\/td>\nDouble-lip NBR\/Viton with dust excluder<\/td>\nSingle-lip generic rubber seal<\/td>\n<\/tr>\n
    Transmission Efficiency<\/td>\n96%+<\/td>\n88-92%<\/td>\n<\/tr>\n
    Service Life (estimated)<\/td>\n3,000+ hours<\/td>\n800-1,200 hours<\/td>\n<\/tr>\n
    Warranty<\/td>\n12 months<\/td>\n3-6 months or none<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

    🔗 Related Products & Accessories<\/h3>\n

    \"PTO<\/p>\n

    \n
    \n

    PTO Drive Shafts<\/p>\n

    Wide angle, telescoping, and standard PTO shafts with shear bolt and slip clutch protection.<\/p>\n<\/div>\n

    \n

    Replacement Gears & Bearings<\/p>\n

    OEM-quality spiral bevel gear sets, tapered roller bearings, and oil seal kits for field repairs.<\/p>\n<\/div>\n

    \n

    Sprockets, Pulleys & Chains<\/p>\n

    Agricultural roller chain, sprockets, V-belt pulleys, and timing belt pulleys for implement drives.<\/p>\n<\/div>\n

    \n

    Custom OEM Gearboxes<\/p>\n

    Custom gear ratios, shaft configurations, and housing designs for implement manufacturers (MOQ 50+).<\/p>\n<\/div>\n<\/div>\n

    ➔ Browse our full product catalog<\/a><\/p>\n

    🏆 Certifications & Quality Standards<\/h3>\n
    \n
    \n

    ISO 9001:2015 Certified<\/h4>\n

    Our manufacturing facility operates under a certified ISO 9001:2015 quality management system, ensuring consistent product quality from raw material inspection through final testing.<\/p>\n<\/div>\n

    \n

    Material Test Certificates<\/h4>\n

    Every batch of 20CrMnTi gear steel is accompanied by a mill certificate verifying chemical composition and mechanical properties. Hardness testing reports are available on request.<\/p>\n<\/div>\n

    \n

    100% Factory Tested<\/h4>\n

    Each gearbox undergoes run-in testing, noise measurement, and oil leak inspection before packaging. No unit ships without passing our final QC gate.<\/p>\n<\/div>\n<\/div>\n

    🏭 About Ever-power Australia PTO Gearbox Co.,Ltd.<\/h3>\n

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

    We are a specialist manufacturer of agricultural PTO gearboxes, drive shafts, and power transmission components with over 19 years of production experience. Our 3,800 m² facility houses CNC gear hobbing, grinding, and heat treatment lines capable of producing over 50,000 gearbox units annually. More than 95% of our production is exported to Europe, Australia, North America, and Asia, serving both aftermarket distributors and OEM implement manufacturers.<\/p>\n

    We offer full OEM and ODM services \u2014 from custom gear ratio engineering to private-label packaging. Our minimum order quantities start at just 50 units for custom specifications, and we maintain ready stock of popular models for immediate dispatch. Whether you need a single replacement gearbox or a container load for your distribution network, we deliver competitive pricing, consistent quality, and responsive technical support.<\/p>\n

    📞 Ready to Order the EP-650PHD? Let’s Talk.<\/h3>\n
    \n

    Whether you need a single replacement unit or bulk OEM supply, our team is ready to assist with product selection, pricing, and fast international shipping. Contact us today for a free quote.<\/p>\n

    ✉ Request a Quote Now<\/a><\/p>\n

    ➔ Visit our homepage for more products<\/a><\/p>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"

    \u306e EP-650PHD Post Hole Digger PTO Gearbox<\/strong> is a right-angle bevel gear drive unit engineered for tractor PTO-powered agricultural implements. Designed for farmers, ranchers, contractors, and municipal operators who depend on reliable power transfer from the tractor PTO to rotary implements, this gearbox features spiral bevel gears machined from 20CrMnTi alloy steel (58-62 HRC), a robust housing, and industrial-grade sealed bearings. Rated at 30 HP<\/strong> with a 2.92:1<\/strong> gear ratio and 540 RPM<\/strong> input speed, it delivers consistent torque for demanding field operations. Whether you are replacing a worn gearbox or outfitting a new implement, the EP-650PHD offers drop-in compatibility with standard PTO shaft connections and common mounting bolt patterns.<\/p>","protected":false},"featured_media":1931,"comment_status":"closed","ping_status":"open","template":"","meta":{"_et_pb_use_builder":"","_et_pb_old_content":"","_et_gb_content_width":""},"product_cat":[1951],"product_tag":[1971,1969,1970,1967,1968],"class_list":{"0":"post-2011","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-post-hole-digger-gearboxes","7":"product_tag-compact-pit-digger-drive","8":"product_tag-earth-digger-gearbox","9":"product_tag-fence-post-auger-gearbox","10":"product_tag-post-hole-digger-gearbox-30hp","11":"product_tag-pto-auger-drive","13":"first","14":"instock","15":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/ptogearbox.xyz\/ja\/wp-json\/wp\/v2\/product\/2011","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ptogearbox.xyz\/ja\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/ptogearbox.xyz\/ja\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/ptogearbox.xyz\/ja\/wp-json\/wp\/v2\/comments?post=2011"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ptogearbox.xyz\/ja\/wp-json\/wp\/v2\/media\/1931"}],"wp:attachment":[{"href":"https:\/\/ptogearbox.xyz\/ja\/wp-json\/wp\/v2\/media?parent=2011"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/ptogearbox.xyz\/ja\/wp-json\/wp\/v2\/product_cat?post=2011"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/ptogearbox.xyz\/ja\/wp-json\/wp\/v2\/product_tag?post=2011"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}