| 摘要 |
Apparatus and method precisely preload bearings onto shafts. A swivel plate swivels up to 360° and locks a rotary shaft axially with a motor shaft. A shim and bearing adjacent the shim preload onto shaft shoulder by lock nut secured to the threaded shaft. The lock nut forces the bearing inner race to expand outwardly, preloading the bearing. A force sensor measures torque on the bearing outer race. Measured torque is monitored within a predetermined range to establish the precisely loaded bearing. The method slides a shim onto support shaft shoulder. A bearing is slid onto tapered surface, and lock nut tightened onto the threaded shaft. The lock nut expands the bearing inner race, reducing the distance between the inner and outer races and preloading the bearing. The outer race at a predetermined, constant speed has torque monitored to a predetermined range to provide a precisely preloaded bearing.
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