The dust cap (also known as dust dome, or dome) is a gently curved dome mounted either in concave or convex orientation over the central hole of most loudspeaker diaphragms. It protects the inner mechanics (such as the pole pieces and the voice coil) from small particles (which can cause rubs) and other contamination. Dust caps can also contribute structural integrity to the voice coil assembly or the cone.
In some loudspeaker designs dust caps can also be part of the acoustic design of the driver by radiating high frequency energy or suppressing it. Typically the dust cap is made of the same material as the cone. In some tweeter designs, the dome is in fact the only sound radiating surface and so it performs both roles.
Dust caps are the small, round metal covers attached to the center of your wheel hub, and are often pressed or driven in place to ensure a tight seal and secure fit. Without these protective caps, your wheel bearings could quickly become damaged by …
XIKE 2 Set 1.78" OD Trailer Bearings Dust Cap Grease Cap, Fits 3/4" Trailer Wheel Hub Axles.
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2pcs Trailer Axle Dust Cap Cup Grease Cover 2.44" Hub with Extra 2 Rubber Plugs,Trailer Axle Wheel Hub and Bearing Dust Cap for Most 5200 to 6000 Pound Axles Dexter
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Direct replacement - this wheel bearing dust cap is designed to match the fit and function of the original part on specified vehicles; Ideal solution - this dust cap is a reliable replacement for an original part that is missing or has failed due to fatigue; Durable construction - this part is made from quality materials to ensure reliable ...
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