These recently launched Gunson steering turntables (part number 77158) are supplied as a pair and enable the user to check the steering angle on full lock to ensure the steering is centralised; check toe in/toe out on turns; and check the caster and KPI (king pin inclination) when used in conjunction with the Gunson 77099 Caster, Camber and KPI gauge.
To accurately measure caster angle, which means you need to rotate the wheels 15˚ or 20˚ in either direction. The big advantage of these turntables is that they are manufactured from aluminium, they’re lightweight and easily portable (each turntable weighs 5kg). Suitable for use on both classic and modern vehicles, they can handle a maximum weight each of 2,000kg (4,000kg as a pair). The range across the turntable is +/- 50˚ in 1˚ increments, offering exceptional accuracy, which is particularly important for modern vehicles that use variable ratio steering racks or variable rate power steering systems.
For this reason, it is even more vital than ever that the steering system is correctly centralised before setting/checking any steering and suspension geometry.