Final answer:
Spider gears, also known as differential gears or pinion gears, are an important component of the drive axle in a vehicle. They allow the two wheels on the axle to rotate at different speeds, preventing wheel slippage and ensuring smooth operation of the vehicle.
Step-by-step explanation:
Spider gears, also known as differential gears or pinion gears, are an important component of the drive axle in a vehicle. They serve the purpose of allowing the two wheels on the axle to rotate at different speeds, such as when the vehicle is turning. By allowing the wheels to rotate at different speeds, spider gears prevent wheel slippage and ensure smooth operation of the vehicle.