Описание
Параметры продукта
| Спецификация | Подробности | Спецификация | Подробности |
|---|---|---|---|
| Модель | Post Hole Diggers Gearboxes – Replacement of Comer Code T-278A 1:1 | Приложение | Various (agricultural) applications |
| Consists of | Коробка передач | Oil | No |
| Max. Input Power | 40.5 kW | Max. Output Torque | 693 nm |
| Max. Oil Capacity | 1.7 l | Max. Oil Change Interval | 500 h |
| Oil SAE Viscosity Grade | 80W-90 | Housing Material | Cast iron GG25 |
| Масса | 23.5 kg | Gear Arrangement | 1 – 2 |
| Соотношение | 1 : 1 | Shaft X | 1 3/8″ (6) (A) |
| Shaft Z | 1 3/8″ (6) (B) |
Обзор продукта
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’re working in wet clay or dry, dusty soil, this unit holds up and keeps the job moving.
Ключевые особенности
- Spot-on Power Transfer: With a 1:1 gear ratio, every turn of the input shaft means the same at the output—no lag, no slippage, just clean, efficient digging.
- Built to Last: Crafted from high-strength alloy steel and heat-treated for toughness, it shrugs off heavy loads and long hours without wearing down fast.
- Drop-in Compatibility: A perfect swap for the Comer T-278A—no mods needed. Fits most popular post hole digger brands right out of the box.
- Rust-Proof Finish: Coated with a phosphate base and tough powder paint, it stands up to rain, humidity, and salty coastal air without corroding.
- Easy Upkeep: Comes with a grease fitting for quick lube-ups; no need to tear the whole thing apart to keep it running smooth.
Product parts
This gearbox is engineered from the ground up with precision components that meet exacting farm-duty standards. Here’s a detailed breakdown of every part that makes it tough, reliable, and long-lasting:
- Housing: 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 ±0.05 mm tolerance for perfect alignment.
- Input & Output Shafts: 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.
- Шестерни: 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° helix angle. Contact pattern optimized to >85% under full load for minimal noise (≤78 dB at 540 RPM) and maximum efficiency (>97%).
- Подшипники: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 preloaded and sealed for life with high-temperature lithium grease (-30°C to +140°C).
- gearbox Seals: 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.
- Смазка: 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.
- Fasteners: Eight Grade 10.9 cap screws (M12 x 40 mm) with nylon insert locknuts, pre-applied thread locker. Torque spec: 85 Nm dry.
Each component is inspected to ISO 9001:2015 standards, with full traceability. Replacement parts—like seals, bearings, and even individual gears—are available off the shelf, so you’re never stuck waiting when it’s time for a quick fix in the field.
Ideal for any post hole digger on the farm—fencing 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.
Руководство по установке
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’s 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—simple habits that add years to its life.
Часто задаваемые вопросы
What is the gear ratio of this replacement gearbox?
The gearbox has a 1:1 gear ratio, ensuring consistent power transfer between the input and output shafts without delay or slippage.
Which agricultural machines is this gearbox compatible with?
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.
How often should the oil be changed?
The recommended oil change interval is every 500 hours of operation to ensure optimal performance and longevity.
What materials are used in the construction of the gearbox?
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.
Custom Reviews
⭐⭐⭐⭐⭐ Carlos Mendoza, Farm Supervisor, AgroVida, Mexico Replaced the old Comer T-278A with this gearbox on our post hole digger last spring. It’s been drilling through rocky soil at 540 rpm without a hiccup. Smooth power, no overheating even after 6-hour shifts. Solid upgrade.
⭐⭐⭐⭐⭐ Lena Holm, Equipment Lead, FrostFarm Co-op, Norway Installed it in -15°C weather and it fired up like it was summer. The 1:1 ratio matches our tractor perfectly, and the seals haven’t leaked a drop. Less vibration, happier operator, fewer coffee spills.
⭐⭐⭐⭐⭐ 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.
⭐⭐⭐⭐⭐ 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.
