When installing the eccentric collar type bearing unit, tighten the eccentric collar by turning it in the shaft rotating direction to secure the shaft to the inner ring. As a result, the shaft is reliably coupled with the inner ring and virtually no deformation occurs to the inner ring of the bearing. However, this bearing unit is not recommended for the machines which can run forward and backward, since the eccentric collar can loosen.
Installation of eccentric collar type
- Check that the frame is sufficiently rigid and has good flatness for the intended operating conditions where the housing will be mounted.
- Check the shaft end for burrs and confirm that the tip of eccentric collar set screw does not protrude into the bearing bore (Fig. 9).
- Securely install the bearing housing to the frame.
Recommended torques for tightening hex. head bolt.
- Correctly position the bearing unit relative to the shaft so the bearing unit is not subjected to axial loads. Then, fit the eccentric collar to the bearing unit.
- Fit the concave side of the eccentric cover over the protrusion provided in the inner ring. Then, turn the eccentric collar in the shaft rotating direction by hands to tighten it temporarily (Fig. 10).
- Fit a rod in the hole on the circumference of the eccentric collar and tap it with a hammer so the collar turns in the shaft rotating direction, as shownin Fig. 11.
- Tighten the eccentric collar set screws to the shaft. The recommended tightening
torque can be found in Table 3 .