The adapter type bearing unit can be reliably secured to the shaft even when it is subjected to impact loads and vibrations. Remember, however, this bearing unit must not be used on a shaft that is subjected to great axial load.
Fit the adapter type unit to the shaft
- Fit the sleeve onto the shaft and position it so that its tapered section
is roughly centered to the bearing. For easy fitting of the sleeve to the shaft,
expand its slot with a flatblade screwdriver. Be sure to install the sleeve so
that the nut is positioned opposite to pulley, etc., for easy handling of the
bearing unit (Fig. 7).
- Fit the bearing unit over the sleeve and fit a cylindrical support, which covers the whole circumference of the bearing's inner ring, to the side face of the bearing's inner ring on the nut side. Then, gently tap the larger diameter side of the sleeve in the arrow mark direction along the whole circumference of the sleeve so that the bearing inner ring is closely seated on the tapered side of the sleeve (Fig. 8 (a)).
- Place the lockwasher, and fully handtighten the nut (Fig. 8 (b)).
- Fit a jig or a screwdriver in one of the slots in the nut, and tap it with a hammer until the nut turns 60° to 90° (NEVER tap the flinger). Overtightening the nut will decrease bearing clearance and deform the inner ring, possibly resulting in overheating or seizing of the bearing. After tightening the nut, check that the shaft can be smoothly turned by hands.
- To lock the nut, bend a tab of the lockwasher that corresponds with a slot on the nut. If necessary, tighten the nut further to align a slot with the lockwasher; NEVER slacken the nut to fit a tab of the lockwasher to the bevel on the nut.
- Securely install the bearing housing to the specified position of the machine.
Recommended torques for tightening hex. head bolt.