Welding
Hammering
Lead constricting
Drawing toneholes

Welding

In this step, a single brass plate is welded along the edge, after which the welded seam is smoothed with a machine called a seam roller.

Hammering

In this step, a hammer is used to shape the cone into a rough bell shape. (For custom models)

Lead constricting

In this step, the bell is pressed between a lead ring and a bell-shaped core rod to form the bell shape.

Drawing toneholes

A die which is embedded in the core rod is spun and raised by a machine to create the toneholes (the rims around the holes where the pads touch).


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