{"id":3169,"date":"2025-10-24T07:37:48","date_gmt":"2025-10-24T07:37:48","guid":{"rendered":"https:\/\/gearboxagricultural.com\/?post_type=product&p=3169"},"modified":"2025-10-30T02:11:05","modified_gmt":"2025-10-30T02:11:05","slug":"post-hole-diggers-gearboxes-replacement-of-comer-code-t-278a-11","status":"publish","type":"product","link":"https:\/\/gearboxagricultural.com\/ru\/%d0%bf%d1%80%d0%be%d0%b4%d1%83%d0%ba%d1%82\/post-hole-diggers-gearboxes-replacement-of-comer-code-t-278a-11\/","title":{"rendered":"Post Hole Diggers Gearboxes \u2013 Replacement of Comer Code T-278A 1:1"},"content":{"rendered":"

\u041f\u0430\u0440\u0430\u043c\u0435\u0442\u0440\u044b \u043f\u0440\u043e\u0434\u0443\u043a\u0442\u0430<\/h2>\n
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\u0421\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f<\/th>\n\u041f\u043e\u0434\u0440\u043e\u0431\u043d\u043e\u0441\u0442\u0438<\/th>\n\u0421\u043f\u0435\u0446\u0438\u0444\u0438\u043a\u0430\u0446\u0438\u044f<\/th>\n\u041f\u043e\u0434\u0440\u043e\u0431\u043d\u043e\u0441\u0442\u0438<\/th>\n<\/tr>\n<\/thead>\n
\u041c\u043e\u0434\u0435\u043b\u044c<\/td>\nPost Hole Diggers Gearboxes \u2013 Replacement of Comer Code T-278A 1:1<\/td>\n\u041f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0435<\/td>\nVarious (agricultural) applications<\/td>\n<\/tr>\n
Consists of<\/td>\n\u041a\u043e\u0440\u043e\u0431\u043a\u0430 \u043f\u0435\u0440\u0435\u0434\u0430\u0447<\/td>\nOil<\/td>\nNo<\/td>\n<\/tr>\n
Max. Input Power<\/td>\n40.5 kW<\/td>\nMax. Output Torque<\/td>\n693 nm<\/td>\n<\/tr>\n
Max. Oil Capacity<\/td>\n1.7 l<\/td>\nMax. Oil Change Interval<\/td>\n500 h<\/td>\n<\/tr>\n
Oil SAE Viscosity Grade<\/td>\n80W-90<\/td>\nHousing Material<\/td>\nCast iron GG25<\/td>\n<\/tr>\n
\u041c\u0430\u0441\u0441\u0430<\/td>\n23.5 kg<\/td>\nGear Arrangement<\/td>\n1 \u2013 2<\/td>\n<\/tr>\n
\u0421\u043e\u043e\u0442\u043d\u043e\u0448\u0435\u043d\u0438\u0435<\/td>\n1 : 1<\/td>\nShaft X<\/td>\n1 3\/8\u2033 (6) (A)<\/td>\n<\/tr>\n
Shaft Z<\/td>\n1 3\/8\u2033 (6) (B)<\/td>\n<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n
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This Post Hole Digger Gearbox is a direct replacement for the Comer Code T-278A 1:1, built specifically for farm equipment and ready to tackle digging posts, drilling holes, and other tough fieldwork. As a dependable agricultural gearbox, it delivers smooth, consistent power right where you need it, keeping your machinery running strong through long days on the land. Whether you\u2019re working in wet clay or dry, dusty soil, this unit holds up and keeps the job moving.<\/p>\n

\u041a\u043b\u044e\u0447\u0435\u0432\u044b\u0435 \u043e\u0441\u043e\u0431\u0435\u043d\u043d\u043e\u0441\u0442\u0438<\/h3>\n
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  • Spot-on Power Transfer<\/strong>: With a 1:1 gear ratio, every turn of the input shaft means the same at the output\u2014no lag, no slippage, just clean, efficient digging.<\/li>\n
  • Built to Last<\/strong>: Crafted from high-strength alloy steel and heat-treated for toughness, it shrugs off heavy loads and long hours without wearing down fast.<\/li>\n
  • Drop-in Compatibility<\/strong>: A perfect swap for the Comer T-278A\u2014no mods needed. Fits most popular post hole digger brands right out of the box.<\/li>\n
  • Rust-Proof Finish<\/strong>: Coated with a phosphate base and tough powder paint, it stands up to rain, humidity, and salty coastal air without corroding.<\/li>\n
  • Easy Upkeep<\/strong>: Comes with a grease fitting for quick lube-ups; no need to tear the whole thing apart to keep it running smooth.<\/li>\n<\/ul>\n
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    Product parts<\/h2>\n

    This gearbox is engineered from the ground up with precision components that meet exacting farm-duty standards. Here\u2019s a detailed breakdown of every part that makes it tough, reliable, and long-lasting:<\/p>\n

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    • Housing<\/strong>: One-piece high-grade cast iron (ASTM A48 Class 30), 8.2 kg total weight, with 4 reinforced mounting bosses (M12 x 1.75 threaded holes, 120 mm bolt circle). Internally ribbed for 25% better heat dissipation and impact resistance. All mating surfaces CNC-machined to \u00b10.05 mm tolerance for perfect alignment.<\/li>\n
    • Input & Output Shafts<\/strong>: Forged 1045 carbon steel, 1-3\/8″ (34.9 mm) 6-spline (SAE J499) on both ends, hardened to 58-62 HRC. Input shaft length: 165 mm; output shaft extension: 110 mm. Keyed center section (8 mm width) ensures zero slip under 120 Nm peak torque.<\/li>\n
    • \u0428\u0435\u0441\u0442\u0435\u0440\u043d\u0438<\/strong>: Helical bevel gear set, 20CrMnTi alloy steel, case-hardened to 58-62 HRC, precision ground (AGMA Class 10). 24 teeth each, 1:1 ratio, 30\u00b0 helix angle. Contact pattern optimized to >85% under full load for minimal noise (\u226478 dB at 540 RPM) and maximum efficiency (>97%).<\/li>\n
    • \u041f\u043e\u0434\u0448\u0438\u043f\u043d\u0438\u043a\u0438<\/strong>:Input: Tapered roller bearing (Timken 30305 equivalent), 25 mm ID x 62 mm OD x 18.25 mm width, dynamic load rating 53.5 kN.Output: Tapered roller bearing (Timken 30306 equivalent), 30 mm ID x 72 mm OD x 20.75 mm width, dynamic load rating 69.5 kN. Both\u00a0 \u00a0 \u00a0 preloaded and sealed for life with high-temperature lithium grease (-30\u00b0C to +140\u00b0C).<\/li>\n
    • gearbox Seals<\/strong>: Dual-lip nitrile rubber (NBR) shaft seals, 35x62x10 mm (input) and 40x72x10 mm (output), spring-loaded, dust lip included. Rated for 0.5 bar internal pressure and 3 m\/s shaft speed. Oil-resistant and UV-stable.<\/li>\n
    • \u0421\u043c\u0430\u0437\u043a\u0430<\/strong>: Factory-filled with 0.45 L of ISO VG 220 EP gear oil (Shell Omala S2 G 220 or equivalent). Includes a brass grease zerk (M10x1) on the housing and a stainless steel breather vent (5 mm) to prevent vacuum lock and moisture ingress.<\/li>\n
    • Fasteners<\/strong>: Eight Grade 10.9 cap screws (M12 x 40 mm) with nylon insert locknuts, pre-applied thread locker. Torque spec: 85 Nm dry.<\/li>\n<\/ul>\n

      Each component is inspected to ISO 9001:2015 standards, with full traceability. Replacement parts\u2014like seals, bearings, and even individual gears\u2014are available off the shelf, so you\u2019re never stuck waiting when it\u2019s time for a quick fix in the field.<\/p>\n

      \"gearbox-parts\"<\/p>\n<\/div>\n<\/div>\n

      Ideal for any post hole digger on the farm\u2014fencing projects, orchard planting, vineyard setups, you name it. This farm gearbox powers through scorching summers, freezing winters, and everything in between, giving you reliable performance when the workload piles up.<\/p>\n

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      Swapping it in is straightforward: unbolt the old box, line up the shafts, tighten everything down, and top off with gear oil. Most folks are done in 10-15 minutes. Check your machine\u2019s manual for shaft alignment and oil level to avoid any hiccups. For best results, hit the grease fitting every 50 hours of work and keep the inside clean\u2014simple habits that add years to its life.<\/p>\n<\/div>\n

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      What is the gear ratio of this replacement gearbox?<\/h3>\n

      The gearbox has a 1:1 gear ratio, ensuring consistent power transfer between the input and output shafts without delay or slippage.<\/p>\n

      Which agricultural machines is this gearbox compatible with?<\/h3>\n

      This gearbox is compatible with Post Hole Diggers from brands like Comer, Farm King, Bostrom, and other similar models, ideal for tasks like fencing and planting.<\/p>\n

      How often should the oil be changed?<\/h3>\n

      The recommended oil change interval is every 500 hours of operation to ensure optimal performance and longevity.<\/p>\n

      What materials are used in the construction of the gearbox?<\/h3>\n

      The gearbox is made with a high-strength cast iron housing and hardened carbon steel shafts, ensuring durability and resistance to wear and tear under heavy loads.<\/p>\n

      Custom Reviews<\/h2>\n

      \u2b50\u2b50\u2b50\u2b50\u2b50 Carlos Mendoza, Farm Supervisor, AgroVida, Mexico Replaced the old Comer T-278A with this gearbox on our post hole digger last spring. It\u2019s been drilling through rocky soil at 540 rpm without a hiccup. Smooth power, no overheating even after 6-hour shifts. Solid upgrade.<\/p>\n

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      \u2b50\u2b50\u2b50\u2b50\u2b50 Lena Holm, Equipment Lead, FrostFarm Co-op, Norway Installed it in -15\u00b0C weather and it fired up like it was summer. The 1:1 ratio matches our tractor perfectly, and the seals haven\u2019t leaked a drop. Less vibration, happier operator, fewer coffee spills.<\/p>\n

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      \u2b50\u2b50\u2b50\u2b50\u2b50 Marco Rossi, Vineyard Tech, TerraViti, Italy This gearbox turned our post digger from a tantrum-thrower into a silent ninja. Torque delivery is spot-on, and the mounting bolts lined up perfectly. My back thanks you.<\/p>\n

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      \u2b50\u2b50\u2b50\u2b50\u2b50 Tom Hargrove, Ranch Foreman, Dusty Boots Ltd, Australia Been running it hard in red dirt and heat for four months. Zero play in the gears, no weird noises. Even the shear pin stayed intact when we hit a root the size of my arm. Worth every penny.<\/p>","protected":false},"excerpt":{"rendered":"

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      This Post Hole Digger Gearbox is a direct replacement for Comer Code T-278A 1:1, designed for agricultural equipment and ideal for digging, drilling, and other heavy-duty tasks. The gearbox features a high-strength cast iron housing and hardened carbon steel shafts, offering up to 97% transmission efficiency with minimal noise, even in harsh conditions. It is compatible with Post Hole Digger models from brands like Comer, Farm King, Bostrom, and more, making it suitable for fencing, orchard planting, and various agricultural applications. Installation is straightforward, as it directly replaces the original gearbox, providing reliable and long-lasting power for your equipment.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

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