Even a fine thread is quite course for fine adjustments of load. Also how will you actually know what the preload is? Forget a torque wrench, you would have to know the frictional resistance to rotation between the two thread halves.
Using a nut isn't wrong. it isn't the correct way, that's not the same thing. Setting the preload to high shortens the service life of the bearing. In a worst case this could be from 10 years to 10 minutes or more probably in a hobby environment from 50 years to 20 years. So careful use of a nut, although not the correct method, can still produce an acceptable result.
Phil
Originally Posted by lagfish  Why is using a nut wrong? Is this because the nut is not square to the face of the bearing? What if I used a square spacer between the nut and the bearing? |