16mm Linear Rail Guide 2Pcs SBR16-400mm Linear Rail Guide with 4Pcs SBR16UU Bearing Block for Fully Supported Linear Rail Length 15.7 inch400mm

This product is a set of linear guide rails that seem to be of high to mid-grade quality. The rails work smoothly and provide a rigid platform that is great for hobbyist woodworkers and craftsmen. The rails can support at least 40 pounds of downward pressure but it depends on the support underneath. They can also be used to guide the movement of a linear actuator lift. However, customers have reported some issues with the product, some of the blocks were delivered with busted out bearings, and some of the screws are too long, which caused them to shear off from the force required. Also, the mounting holes in one of the rails were drilled 1/16" offset from the rest, showing a lack of precision machining. Nevertheless, the supplier seems responsive to customer issues and is quick to send out replacement parts when necessary.