THK SSR20XV1SSC1 Linear Bearing is for use on the Z axis, this bearing has 2 holes.
THK bearings are the most commonly used bearings on CNC routers. Star and THK bearings look quite similar so carefully to ensure you have selected the correct bearings. Ensure that selected bearings match the ones on the machine.
The bearings are easily damaged during installation. The bearings are easily damaged during installation - please ensure proper installation protocols are followed to minimize risk.