中文简体
EnglishHub Lock Inner Nuts Hub lock inner nuts are fasteners used to secure wheel hubs to axle spindles. Tightened with an outer nut, they clamp the hub securely into place and prevent loosening over time. An inner nut threads onto one end of an axle spindle while an outer nut threads onto its face of the hub shell.
These fasteners may be difficult to access and tighten correctly, which makes knowing their proper use all the more crucial. A misinstalled inner nut could cause bearing rubbing against hub shell, leading to increased wear on inner race and premature failure of inner race bearings.
Use of appropriate tools is also key when working with these nuts. A pair of vice grips or molegrips will come in handy to secure and tightening nut, while torque wrench is advised to ensure the proper specifications of tightening are met.
Once your nut has been tightened to specifications, it's time to secure it using either a cotter pin or, more commonly these days, a lock nut. Lock nuts feature an integral locking mechanism which prevents rotation; typically easier than traditional hex nuts with keyed washers when installing and removing, but more difficult tightening and loosening operations may be needed for these lock nuts.
Hub Lock Inner Nuts are especially helpful when installing new bearings or adjusting existing preload. A conventional axle nut is tightened down against two cone-shaped bearings to achieve desired preload and then secured using a cotter pin or jam nut; hub Lock inner nuts perform this same function by locking an inner hex nut against the cone-shaped nut already mounted to an axle.
There are multiple methods for installing a lock nut, with the most common approach being placing a hex nut over an hexagon-shaped cone and tightening it until it reaches your specified tightening specification. While this will create a fully functioning locking device, this approach does not offer you the best chance at setting the appropriate amount of preload.
An efficient method for setting preload is tightening both nuts against each other - first the hex nut against its cone-shaped counterpart, then tightening both nuts together to set desired play. This gives more accurate results while eliminating accidental overtightening or having to untighten later when setting preload incorrectly. Also important: never interchange hex nuts and lock nuts - as their thread pitches and sizes differ considerably and could damage components or wheels if mistakenly mixed together.
The hub lock inner nuts
