🔩 Serrated Drivetrain Flanges – Tata LPT & LPK Series (e.g., CLA31.28)
📌 Vehicle Platforms Covered
These serrated drivetrain components are used on various Tata truck models, including:
TATA LPT 3127 & 2527 series
TATA LPK 3128
Leyland/Tata L/L FVDP 3123 & 2523
Commonly referenced as CLA31.28 serrated flange type for driveline coupling
These models are all medium-to-heavy duty commercial trucks primarily used for goods transport and tipper applications, with engines and gearboxes sized for robust load-carrying performance.
⚙️ Component Type: Serrated Coupling / Drive Flange
These parts are serrated flanges used in the driveshaft / propeller shaft / gearbox output or differential input areas of the driveline. The serrated (toothed) surface provides a positive mechanical engagement between the flange and mating joint (such as a yoke or companion flange). Typical applications include:
Output flange on transmission or transfer case
Coupling flange on propeller shaft halves
Input flange to a differential or intermediate shaft
The serrations help in:
✔ Improving torque transmission
✔ Reducing backlash or slip
✔ Lowering vibration and wear over time
Serrated designs are standard for heavy-duty drivetrains to ensure reliable power transfer under load and vibration.
📌 Part Reference / Example
Manufacturers and aftermarket catalogs often list these serrated flanges with specific measurements and application codes. For example:
A serrated flange for TATA LPK 3128 / L/L 3123 / Bharat Benz 2523C with cross size ~52 × 147 mm, 4 bolt holes, plate size ~150 mm and total length ~125 mm.
This type of specification also applies to similar Tata flange parts like CLA31.28 serrated coupling used in the models you listed.
🛠️ General Functional Features
✔ Serrated Contact Surface
Provides multi-tooth engagement with a companion flange or yoke, improving performance under torque load.
✔ Robust Construction
Typically made from forged or machined steel built to withstand shock loads, vibration, and rotational stress.
✔ Standard Fitment for Medium/Heavy Commercial Trucks
Designed to match OEM bolt patterns, diameters, and spline configurations used in Tata LPT/LPK drivetrains.
🚛 Applications
The serrated flanges you mentioned (like CLA31.28) are typically found in:
Transmission output couplings
Propeller shaft to differential connections
Centre couplings on multi-section driveshafts