Precision combined roller bearing and steel profile

This is achieved by accurately milling the ‘mouth’ of the hot rolled steel section, which of course increases the dimension of the mouth, and then increasing the outside diameter of the bearing to reduce the running clearance from the normal clearance to a precision clearance. The tighter running tolerance between the bearing and the rail makes it suitable for applications requiring higher positional precision, whilst still offering the high load capacity of the combined roller system and the cost benefits over many other linear motion systems.