When most people think of washers, they envision disc-shaped metal fasteners with a hole in the center. While most washers are, in fact, made of metal, some of them are made of elastomers, such as rubber. Rubber washers still feature the same disc-shaped design as their metal counterparts, but they are significantly softer and more elastic.
Load Distribution
Like most washers, rubber washers offer load distribution. They will distribute the loads of the fasteners with which they are used across a larger surface area. Washers are typically used in conjunction with a threaded fastener, such as a bolt or screw. You can place a bolt or screw through a washer, followed by driving the bolt or screw into the workpiece. The washer will spread the load of the bolt or screw across a larger area of the workpiece, thereby protecting the workpiece from damage.
Sealing
Rubber washers are often used in sealing applications. They can fill open spaces to prevent fluids or moisture from reaching sensitive components or areas. Unlike steel, aluminum and other metals, rubber is elastic. It can expand and stretch under pressure while conforming to irregular shapes. When you tighten a bolt or rod with a rubber washer, the washer will expand. This expansion will allow the rubber washer to seal the surrounding area.
The sealing abilities of rubber washers makes them useful for the following applications:
- Plumbing
- Automotive
- Aerospace
- Construction
Nonconductive
Rubber washers are nonconductive. They are made of a synthetic material with a high level of electrical resistance. Why does this matter? For electrical systems and devices, washers may be exposed to electrical currents. If a washer is made of a conductive material like metal, it may cause short circuits or other damage to the adjacent components. Rubber washers, however, offer a safe alternative to metal washers. They are nonconductive, so electricity can’t travel through them.
Types of Rubber Washers
It’s important to note that not all rubber washers are the same. They are available in different types of rubber. Some of them are made of silicone or neoprene, for example, whereas others are made of nitrile.
Silicone washers are an excellent choice for high-temperature environments. They can withstand hotter temperatures than other types of washers. Neoprene washers are better suited at resisting weather-related damage, making them ideal for outdoor applications. Nitrile washers, on the other hand, are an excellent choice for applications involving oils, solvents or other chemicals.
