The torque specifications for a front-axle wheel bearing varies according to the type of vehicle it applies to, however it ranges on average between 15 and 20 ft-lbs. Most of the torque is directed to the axle nut, which mounts on top of the hub assembly and can range up to 200 ft-lbs.
In order to properly tighten the front-axle wheel bearing on a vehicle be sure to check the repair manual for exact directions. Vehicle makes have their own specific torqueing patterns they follow when installing front-axle hub bearings. However, every hub should be cleaned and inspected prior to their installation. The axle nut should also be replace.