NSK 1306 Self-Aligning Ball Bearing - 30 mm ID, 72 mm OD, 19 mm Width Carriage there are numerous easily interchangeable

there are numerous easily interchangeable and frequently combinable individual parts and accessories

and two 1/4″ sae Access Tee Connectors

This rough surface "bites" into the screw head which avoids unintentional slipping out of the screw

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NSK 1306 Self-Aligning Ball Bearing - 30 mm ID, 72 mm OD, 19 mm Width Carriage there are numerous easily interchangeableSelf Aligning Ball Bearing NSK self aligning ball bearings have two rows of balls and a common spherical outer raceway. They tolerate shaft and housing misalignment and accommodate moderate radial loads with low friction. They are ideal for applications where shaft deflection or mounting errors are expected.