SMI Precision Cross Roller Slides are built with the same advanced technology and cost saving technique as our ball slides. The bearing design utilizes a bearing system containing cylindrical steel rollers offering engineers an option for higher load carrying capacity with extremely smooth and predictable life. Pre-assembled and pre-loaded for immediate installation, mounting can be done with our standard hole patterns with standard fasteners or can be created to your requirements including metrics. Center holes are standard and are a unique feature found only on SMI precision cross roller slides (for travel 1" and over). Mounting with a center hole will eliminate any bow on the slide and add greater mounting security. Interchangeable with many popular sizes. Custom made cross roller slides available.