Spider and universal joint arrangement

A spider, for a universal joint for prop shafts suitable for the transmission of torque, comprising pins arranged around a mid-point and extending from the base body in pairs about a common axis, whereby the axes cross at the center of the spider at a right angle. Each pin comprises a surface arranged concentrically about the corresponding pin axis forming a running surface, or has a running surface for the rollers of a roller bearing and a transition region between the surface forming, or supporting a running surface and the base body. The spider is characterized by the following features:-functional surfaces for the support of at least one sealing device with formation of a seal surface of a sealing pair on the front face of the base body facing the pin, on each pin, said functional surface runs perpendicular to a plane which runs from the pin axis of the corresponding pin to an adjacent pin in the circumferential direction, the functional surface runs from the transition region to at least a region in the radial direction about the pin axis which may be described by a radius which corresponds to at least 1.5 times the radius of the pin and each functional surface is provided with at least one centering surface perpendicular thereto for the bearing mounting of a seal holder supporting the sealing device.