McGill GEK-PC Lined Series Bearings have 3 components; the ball, the liner and the outer race. The ball is inserted into the body and the body is then swaged around the ball to lock it in and it is then loosened to allow it to move. The body is made from Carbon Steel, the ball is hard chrome plated. These bearings are ideal for use in areas which require a tight fitted ball. These bearings are ideal for use in areas where the joint is constantly in motion as the liner insures the ball mooves freely without any knocking or play being induced. These are commonly used in motorsport and on industrial equipment. These joints do not require lubrication. DIMENSIONS: Bore Hole: 18mm ~ Outer Diameter: 35mm ~ Width of the Ball: mm ~ Width of the Casing: mm ~ Mis Angle: 15 degrees To complement these.