Half Yoke — Tata Mega/HT (for CROSS‑4050BP) — Description
A half yoke in the Tata Mega/HT driveline is a key propeller shaft / universal joint component that forms one half of the pair of yokes used in the universal joint (U‑joint) assembly. The designation CROSS‑4050BP refers to the specific U‑joint cross (spider) size that this yoke is designed to work with in the Maxi‑truck’s drive shaft.
🛠 What It Is
The half yoke is a forged steel yoke arm with two fork‑type prongs (or a flange form) that receive two bearing caps of the universal joint cross (“spider”).
It pairs with a companion yoke on the adjoining shaft (either on the transmission side or rear driveshaft side), and the universal joint cross sits between them.
⚙️ Function
Holds the U‑Joint Cross: It securely supports two arms of the universal joint cross by housing the cross’s bearing caps, allowing the cross to pivot inside the yoke.
Facilitates Torque Transfer: Works with the U‑joint cross and companion yoke to transmit torque from the gearbox output through the propeller shaft to the rear axle.
Allows Angular Movement: As the vehicle moves and suspension articulation changes the angle between shafts, the half yoke and U‑joint allow this movement without binding, ensuring smooth rotation.
Reduces Vibration & Wear: Proper support and alignment help minimise vibration and premature wear on bearings and shaft components.
📍 Where It Fits
Installed at the universal joint location of the propeller shaft assembly in the Tata Mega/HT.
One half yoke is usually mounted on the drive shaft end, and its matching yoke on the next shaft segment (e.g., transmission side or intermediate shaft).
The CROSS‑4050BP U‑joint cross sits between them, with all bearing caps seated in the corresponding yoke arms.