Torque Specifications on Wheel Bearings

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All vehicles come equipped with wheel bearings. The wheel bearings are responsible for allowing the wheels to be able to turn properly on the spindle. The wheel bearing is held in place by an inner and outer nut. Both of these nuts have to tightened and torqued for the wheel bearing to be able to work properly. If the torquing procedure for the wheel bearing nuts is not done properly, it can cause the bearing to wear out prematurely from the friction of being over-tightened or from the looseness of being under-tightened.

Wheel bearing
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A wheel bearing is designed with a bunch of rollers that are enclosed inside of a round metal cage. The rollers enable the bearing to turn the wheel hub. The wheel bearing also has a race in the center of the bearing that is seated around the spindle. As the vehicle is in motion the wheel bearing turns at the same time as the wheel is turning. The wheel bearing makes it possible for the wheels to be able to turn with no restrictions and with no slack.

Mechanic lubricates wheel bearing
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There are different types of wheel bearings to consider when torquing a wheel-bearing nut. Not all of the wheel-bearing nuts will require the same torquing procedure. This is why it is important to know the different types of wheel bearings and the different torquing procedures for the wheel-bearing nuts.

Macro view of bearing
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Torque the inner nut to 200 foot-pounds with a torque wrench and a socket for the initial adjustment. Back off of the inner nut one complete turn. Turn the hub in a clockwise direction with your hands to free up restrictions from the wheel bearing. Re-torque the inner nut to 50 foot-pounds with the torque wrench and socket. Back off of the nut one-quarter of a turn. Torque the outer jam nut to 250 foot-pounds with the torque wrench and a socket. Do not back off of the nut.

Torque the inner nut to 200 foot-pounds with a torque wrench and a socket for the initial adjustment. Back off of the inner nut one complete turn. Turn the hub in a clockwise direction with your hands to free up restrictions from the wheel bearing. Re-torque the inner nut to 50 foot-pounds with the torque wrench and socket. Back off of the nut one-quarter of a turn. Torque the outer jam nut to 150 foot-pounds with the torque wrench and a socket. Do not back off of the nut.

Man holding torque wrench
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Torque the inner nut to 100 foot-pounds with a torque wrench and a socket for the initial adjustment. Back off of the inner nut one complete turn. Turn the hub in a clockwise direction with your hands to free up restrictions from the wheel bearing. Re-torque the inner nut to 20 foot-pounds with the torque wrench and socket. Back off of the nut one-third of a turn. Torque the outer jam nut to 150 foot-pounds with the torque wrench and a socket. Do not back off of the nut.

Impact torque wrench
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