Linear Shaft on a Rail - Ceramic Coated Aluminum CCR10-012.000-SL Diameter: 5/8" Length: 12" Simplicity Linear Plain Bearing but the TWN blocks are

but the TWN blocks are double sized as if they were two SPBs fused together

8mm diameter

located in the pillow block

for V-Guide Size 3 wheels

Linear Shaft on a Rail - Ceramic Coated Aluminum CCR10-012.000-SL Diameter: 5/8" Length: 12" Simplicity Linear Plain Bearing but the TWN blocks areLinear rail and 5 8" diameter shaft, 12" in length, made from a single piece of feather weight ceramic coated aluminum. This one piece gliding surface assembly is designed for self lubricating Simplicity linear bearings with FrelonGOLD liners, which perform exceptionally in extreme conditions like dirt, heat, and vibration. The linear rail segment is pre drilled for mounting, while the shaft is not drilled nor tapped. Light weight, non magnetic and