Purpose of locknuts+adjustable nuts on sealed hub bearings

Asked by: Tara Smith

What is a hub lock nut?

Locknuts are used to locate bearings onto a shaft. Additionally, they can be used to mount bearings with a tapered bore onto tapered shaft seats and adapter sleeves and to dismount bearings from withdrawal sleeves.

How do bearing lock nuts work?

As the nut is threaded onto a shaft or rod, it will spin freely until the threads from the host part engage the nylon insert. The threads of the mating shaft will displace the nylon and create resistance. This resistance prevents unintentional moving of the lock nut.

How do you put a lock nut on a bearing?

How to Use Bearing Lock Nuts

1. Slide the bearing onto the shaft or adapter sleeve.
2. Slide the bearing lock washer onto the shaft with the tabs facing away from the bearing.
3. Screw the bearing lock nut into position with the chamfer facing the bearing lock washer.
4. Tighten the nut with a spanner wrench or lock nut socket.

Which way should nut face?

Quote from video: So if you look at the lock nut one side has a tapered crown to it and that's the side that goes up another way you can tell is if you look at one side of the lock nut it looks very round.

What is the torque for axle nut?

Quote from video: We have to set to 184 foot-pounds which is the torque specification.

What is the purpose of KEPS nut?

Keps Nuts. Keps nut, (also called a k-lock nut or washer nut), is a nut with an attached, free-spinning washer. It is used to make assembly more convenient. The locking action is achieved when the nut is tightened against a bearing surface as the teeth of the lock washer dig into it.

How does a Philidas nut work?

A Philidas nut is a locknut with one or more slots cut laterally in the reduced-diameter circular top for less than half the diameter, the metal above the slot(s) being deformed downwards so that over the last one or two turns, the thread for half the diameter is “axially depitched” or displaced from its normal

How do nylon lock nuts work?

Nylon Locking Nuts



Friction heats up and softens the nylon insert during installation, allowing it to be deformed by the thread of the screw. As this cools down, the nylon insert hardens, locking the fastener into position.

What is the use of Plummer block?

A pillow block bearing (or plummer block) is a pedestal used to provide support for a rotating shaft with the help of compatible bearings and various accessories. The assembly consists of a mounting block which houses a bearing.

Can you use lock washers with lock nuts?

Theoretically, it is possible to use prevailing nuts and adhesives together with Nord-lock washers, but they will increase the thread friction when tightening the joint. When tightening, less of the torque can be converted into useful clamp load because the torque must overcome the additional friction.

How do you use a lock nut on a washing machine?

Quote from video: So this is your standard lock washer been cut on the edge there and then twisted. So when you lock a nut down it locks the nut in place it's good to use these with a flat washer.

How tight should bearing nut be?

For context, the tolerable end-play for truck wheel bearings is the same: 0.001 to 0.005 inches, also expressed as 1 to 5 mil or 0.025 to 0.127 mm. In other words, it’s perfectly acceptable to adjust wheel bearings so that they are just a little bit loose, but not too loose.

How tight should spindle nuts be?

Expert Reply: The nut on the spindle should be tightened until snug, with no side-to-side play in the hub and then backed off slightly, about maybe a 1/8 of a turn.

Can you over torque axle nut?

No. Over tightening won’t put more of a strain on the bearings in this sort of design. You should’ve torqued those nuts down quite a bit.

What is the difference between a lock nut and a regular nut?

Traditional nuts simply consist of a basic threaded hole, so constant exposure to vibrations can knock them loose from the bolt on which they are placed. Lock nuts protect against loosening, however, by featuring a design that increases the nut’s resistance to vibrations.

How does a KEPS nut work?

Keps Nuts, or K Lock Nuts, are hex nuts pre-assembled with a free spinning external tooth lock washer. The locking action is achieved when the nut is tightened against a bearing surface as the teeth of the washer dig into it.

What is a lock nut called?

A locknut, also known as a lock nut, locking nut, self-locking nut, prevailing torque nut, stiff nut or elastic stop nut, is a nut that resists loosening under vibrations and torque. Prevailing torque nuts have some portion of the nut that deforms elastically to provide a locking action.

What happens if you drive with hubs locked?

Quote from video: It won't damage your car at all it will cost you a bit more fuel.

Why do you lock your hubs?

This is done to reduce the mechanical resistance of the front-portion of the drivetrain when four-wheel drive is not in use.

Does it hurt your truck to drive in 4 high?

Extended driving in 4-Hi, with a part-time 4WD truck, on a high traction surface like pavement, will result in drive-train components like u-joints, axle, transfer gears, bearings, and drive-shafts getting damaged and eventually failing.