What is a external tooth lock washer?

What is a external tooth lock washer?

External use lock washers (also called star washers) have teeth made to bite into the bearing surface. An external tooth lock washer is designed to provide stronger holds than internal-tooth washers as the teeth bite into a larger radius, and are best suited to large screws.

Do toothed lock washers work?

Tooth lock washers (electrical contact washers) are designed to prevent bolted joints from loosening using friction. These washers work best with soft surfaces as hard surfaces will flatten the teeth – preventing them from successfully biting into the surface and securing the joint.

When should lock washers be used?

Flat washers are used to increase the surface area in order to more evenly distribute the force applied with tightening the fastener. Lock washers are used as a means of creating tension during tightening in order to help keep the nut from working loose later.

What are toothed washers used for?

The internal tooth lock washer is designed to prevent a nut or bolt head from loosening with the strut action set up by the teeth. The teeth, also, absorb shock and vibration. The teeth abrade the grounding surface in electrical grounding applications to improve the electrical connection.

Where should a lock washer go?

The washer helps prevent damage to the surface of the object being fastened. In most cases where the bolt is easier to turn, the bolt has a round head that will cause less damage anyway. For the same reason, lock washers always go on the nut side to stop the nut moving.

Do you need lock washers?

When are lock washers needed? Lock washers are needed when the fastener assembly is subject to vibration or wherever back off is considered an issue. When should I use washers with bolts? Always use a washer between the installation material and the nut.

Can you use a lock washer without a nut?

It’s useless if you do. A lock washer is designed to press into the surface of the nut and whatever is being fastened. Flat washers spread out the load of the tension to prevent pull through or bending whats being fastened, but makes lock washers useless.

What is an internal tooth lock washer?

Internal Tooth Lock Washer, Internal Locked Tooth Washer. The internal tooth lock washer is designed to prevent a nut or bolt head from loosening with the strut action set up by the teeth. The teeth, also, absorb shock and vibration.

What is the purpose of an internal tooth washer?

An internal tooth lock washer has teeth around the center hole, while the external tooth lock washer boasts of teeth around the O.D. Both of these fasteners provide a locking mechanism that activates when the teeth bite into the joint material, holding tight under pressure and vibration.

What is the purpose of a lock washer?

Lock washers are placed between the bolt head, screw head or nut and the surface of anything that is being fastened. The main function of lock washers is to help bolts and screws retain their torque and prevent them from loosening.

What does a lock washer do?

Lock washers are commonly used in applications involving vibration and possible slippage of fasteners. Industries that commonly use lock washers are transportation related (automotive, aircraft and marine), but they are also used in household appliances such as air handlers, air conditioners and washing machines.