What measurement capability must a ball joint checker have?

The measurement capability that a ball joint checker must have is 0.001 of an inch. This level of precision is crucial because ball joints are vital components of a vehicle's suspension system, and even slight variations in measurement can indicate wear or issues that may affect the vehicle's handling, safety, and overall performance.

A precision measurement of 0.001 of an inch allows technicians to accurately assess the condition of the ball joints and make informed decisions about their maintenance or replacement. This level of detail is necessary to ensure that any potential issues are caught early enough to prevent more significant problems down the line, thus maintaining the safety and functionality of the vehicle.