ittle Beaver OEM Bronze Transmission Gear β 1-1/4" Bore, 10:1 Ratio, Double Keyed (10070)
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Little Beaver OEM Bronze Transmission Gear β 1-1/4" Bore, 10:1 Ratio, Double Keyed (Part # 10070)
The genuine Little Beaver 10070 Bronze Transmission Gear is the factory OEM replacement drive gear for Little Beaver mechanical post hole earth drills and power heads. Featuring a 1-1/4" (1.25") bore, a standard 10:1 reduction ratio, and a heavy-duty double-keyed profile, this precision component delivers direct, low-friction power transfer from your engine's flex drive shaft to the auger output assembly.
Engineered from premium cast bearing bronze, the 10070 gear mates smoothly with the steel drive pinion while serving as a deliberate sacrificial wear defense. If an auger bit encounters buried boulders, thick tree roots, or hardened clay, the bronze gear absorbs severe rotational shock to prevent destructive damage to the outer transmission casing or driveshaft. Dual broached keyways spread heavy torque loads evenly across the shaft to prevent key shearing during full-throttle operation.
Recommended Applications & Repairs
- Transmission Rebuilds: Replacing worn, rounded, or stripped bronze drive gears in standard 10:1 ratio Little Beaver oil-bath gearboxes.
- Rental Yard Servicing: Essential maintenance rebuild part for commercial rental fleets operating mechanical post hole diggers.
- Shaft Backlash Elimination: Restoring tight factory gear tooth mesh, eliminating rotational play, and maximizing auger drill penetration.
Key Performance & Construction Features
- Standard 10:1 Gear Reduction: Factory standard gear ratio engineered for optimal rotational auger speed across general post-hole digging applications.
- Precision 1-1/4" Internal Bore: Machined to exact factory tolerances for a direct, slip-fit slide onto standard 1.25" main transmission output shafts.
- Heavy-Duty Double-Keyed Hub: Dual keyways effectively double torque distribution, preventing single-key shear and shaft fretting under shock loads.
- Sacrificial Bearing Bronze Metallurgy: High-lubricity bronze minimizes friction against the mating steel pinion and protects internal gearbox housings during auger bind-ups.
- OEM Factory Fit (MPN: 10070): Genuine Little Beaver replacement part ensures factory tooth alignment, correct backlash, and smooth engagement.
What's Included
- 1 Γ Genuine Little Beaver Bronze Transmission Gear β 1-1/4" Bore, 10:1, Double Keyed (Part # 10070)
Technical Specifications
| Specification Parameter | Product Detail |
|---|---|
| Manufacturer / Brand | Little Beaver, Inc. |
| OEM Part Number / MPN | 10070 |
| Internal Bore Diameter | 1-1/4 in. (1.25" / 31.75 mm) |
| Gear Ratio | 10:1 Gear Reduction Ratio |
| Hub & Keyway Design | Double Keyed (Dual Drive Keyways) |
| Material Composition | Cast Bearing Bronze Alloy |
| Gearbox Compatibility | Little Beaver Mechanical Earth Drill 10:1 Oil Bath Transmissions |
| Mating Component | 1-1/4" Main Transmission Output Shaft (#10080) & Drive Pinion |
| Lubricant Requirement | Little Beaver Factory Spec Gear Lube (Yellow-metal / bronze safe) |
| Country of Origin | United States |
π‘ GEARBOX REBUILD PRO-TIP: When installing the 10070 gear, always inspect both drive keys and the 1-1/4" main shaft (#10080) for burrs or rounding. Never reuse scored keys. Flush the gearbox case completely with solvent to clear brass filings, inspect the upper and lower shaft bearings, install fresh seals (#10115), and refill with clean bronze-safe oil before testing.
Frequently Asked Questions: Little Beaver 10070 Bronze Gear
A: The Little Beaver 10070 bronze gear features a precision 1-1/4 inch (1.25") internal bore, a standard 10:1 gear reduction ratio, and dual keyway broaching (double keyed) to handle high rotary torque.
A: The double-keyed configuration utilizes dual shaft drive keys to evenly distribute extreme rotational torque across the 1-1/4" main output shaft, preventing key shear and shaft galling during heavy drilling and sudden bind-ups.
A: It is CNC-machined from high-strength bearing bronze to mate with the steel drive pinion. In severe shock-load situations (such as striking large rocks or dense tree roots), the bronze gear acts as an engineered sacrificial component to protect the main gearbox housing and flex drive shaft from catastrophic failure.
A: Always use genuine Little Beaver factory-specified transmission gear lubricant. Standard automotive EP lubricants often contain active sulfur additives that can corrode and degrade yellow bronze components.