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It is the surface of the drum shell that actually touches the drum head.
The area of this surface is less than that of a cross-section of the whole shell, since it is created by making an angled cut into the shell around the rim.
The thickness or thinness of the bearing edge affects the tone of the drum; finer or sharper bearing edges yield a brighter tone, while thicker bearing edges yield a warmer tone.
If the bearing edge is not perfectly level and perpendicular to the cylinder of the shell, the drum head will not seat properly and the tone of the drum will suffer.
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What is a drum defect?
Defects usually occur then a head is improperly tensioned, forcing the shell out of round. Other defects include bent or chipped counterhoops, broken lugs, cracks/dents in the drum shell, dents, wearing at the drum head, and damage the the bearing edge, where the drum head makes contact with the shell.
Do drum shell packs come with drum heads?
Yes
What is a bass drum hoop?
A bass drum hoop is the outer rim of the bass drum that sandwiches the bass drum head to the actual shell of the bass drum.
What is a nut box on a drum?
Its the metal fixing fitted to the shell of the drum that the tension rod screws into to add tension to the drum head via the hoop.
Why would a drummer hit the drum near the edge to make the sound of the drum give a note of the lower pitch?
Normally hitting the drum closer to the edge would make the note lower, it can make it quieter. Sometimes a drum can have a "sweet spot" as it is called this is where when struck gives the best tone.
