Why is there play in the steering wheel?

[Pete]

Steering wheel play is caused by improper assembly, adjustment, or wear of mechanical components between the steering system and the steering wheels. Below are the relevant explanations regarding play: 1. Specific causes include excessive meshing clearance of the steering gear transmission pair; looseness at the connections of the steering linkage; excessive clearance between the steering knuckle kingpin and bushing; looseness of the steering wheel hub bearings, among which the first two have the greatest impact. The main reasons for this are usually the habit of turning the steering wheel to its "full lock" position. It is best to avoid doing this when the vehicle is stationary; instead, wait until the car starts moving slightly before turning. Additionally, regular four-wheel alignment checks should be performed. 2. Steering wheel play refers to the free movement (also called free angle or travel) of the car's steering wheel. It is the angle the steering wheel can turn without causing the steering wheels to deviate. This play is the cumulative result of the combined clearances in the entire steering system and steering wheels. A certain amount of free play in the steering wheel is beneficial for cushioning road impacts, making steering smoother, and reducing driver fatigue. However, excessive play can affect steering responsiveness and cause wheel wobble, which may compromise driving safety. The ideal free angle for steering wheels is generally between 20 to 30 degrees.