What is the purpose of a Belleville washer?
Their conical configuration enables them to support high loads with relatively small deflections and solid heights compared to helical springs. Belleville Washers are often used to solve vibration, thermal expansion, relaxation and bolt creep problems.
Where are Belleville washers used?
Belleville washers are typically used in conditions of high current loading or cycling. They are used to absorb vibration and can maintain preload in bolted joints, indicating correct preload based on the gap between adjacent washers. They can also help with “bolt creep” or stress relaxation between a bolt and washer.
How does a conical washer work?
How Conical Washers Work. The conical spring washer has a cone shape that presses against the underside of the bolt head and into the installation material. This increased tension has a number of benefits including: Vibration Control (Lock Washer)
Which way does a spring washer go?
Unlike flat washers, which are placed on both the bolt and nut side, spring washers only go on the nut side of the fastener to establish a bond. A spring washer offers axial flexibility that’s intended to prevent loosening of the fastener with which it’s paired.
How do Belleville washers work?
How Belleville Washers Work. The purpose of a Belleville washer is to absorb loads by acting as a spring. When a load is applied a Belleville washer, the washer compresses. At the same time, the Belleville washer exerts an equal amount of force against the object.
Which goes first washer or spring washer?
Method 1 of 3: When used correctly, a lock washer will hold the nut or other threaded fastener in place. To help it accomplish this, put the lock washer on first, below the fastener. If your project calls for other washers or hardware elements, they should go on before the lock washer so that it can hold them in place.
Does the washer go next to the nut or bolt?
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.
Which side of the washer goes down?
The sharper edge goes towards the surface. The side that goes towards the nut or bolt is rounded. The flat washer goes between the nut/bolt and the split lock washer.
How do you install a spring washer in Belleville?
Installing Belleville washers is very easy. There are only a few steps to consider: Determine the project load capacity and deflection. Decide which Spring Washer Stack will give you the optimal results. Slide the washers onto a bolt in the optimal stack.
What do you need to know about Belleville washer?
The Belleville washer is a conical-shaped metal disk designed to support high loads with small deflections compared to conventional helical springs. This washer is often used to reduce vibration, thermal expansion, relaxation and bolt problems.
Can a belleville washer be installed upside down?
Because the “dish” is so slight, Belleville washers are often found to have been installed upside down. The clamping force is improperly applied, resulting in poor joint contact. Another installation caveat: Neither the Belleville nor an associated flat washer should be larger in diameter than the width of the joined members.
When to tighten the crown on a belleville washer?
The industry recommends tightening until the Belleville is flat, and leaving it that way. The relaxation of the metals under stress will be sufficient, within 48 hours, to restore the crown to the washer, and it will retain its full compressive force on the connection. . . .