🔩 Gear Flange (Serrated) – Leyland L/L 3118, L/L 3123 & Eicher 40.40
📌 What It Is
A gear box coupling flange (serrated type) — this is a drivetrain component that connects the gearbox output shaft to the propeller shaft (or companion flange/yoke). The serrated face enables positive mechanical engagement with the mating flange, improving torque transfer and reducing slippage under load.
⚙️ Key Specifications & Features
✔ Serrated / Serrated Coupling Surface
• The flange face has serrations (toothed or textured profile) that mesh with the companion flange or yoke, providing a secure torque‑transmitting interface suitable for medium‑to‑heavy duty truck applications. Serrated designs help reduce vibration and play between mating driveline components.
✔ Gearbox Output Flange Function
• Bolts to the gearbox output or main shaft flange and mates to the driveshaft yoke / propeller shaft flange. It transfers rotational power from the gearbox directly into the driveshaft assembly.
✔ Typical Dimensions (Example from Catalog Data)
• For Eicher 40.40, typical coupling flange specs from parts catalogs show:
– 8″ / ~203 mm round flange face
– 12 bolt holes (common pattern)
– Bolt hole pitch ~12.1 mm
– Approx 81–86 mm envelope thickness
– Oil seal size ~72 mm (depending on specific fitment)