Everything about Bellmaker totally explained
Bellfounding is the craft of creating
bells in a
foundry. A practitioner of the craft is called a bellmaker or bellfounder.
Bellfounding
The term
bellfounding describes the casting of large bells for use in churches, clocks, and public buildings.
Bells which are rung are usually made by
casting bell metal (a high-copper
bronze alloy) of a size appropriate for the pitch the bell is intended to produce. Other materials occasionally used are
brass or
iron.
Fine tuning of metal bells is achieved on a
lathe to remove a precise amount of material from the inside of the bell to produce a true tone with correct
harmonics. Small cheap bells, of course, don't undergo these steps. Bells are used often in sets in
handbell choirs, chimes or
carillons and so must be well tuned in order to produce a correct scale of musical notes.
Bellfounders may create one large bell (such as the
Liberty Bell). The largest bells weigh several tons and may be to be sounded by swinging only the clapper instead of the entire bell as swinging such large bells would cause structural problems for the towers they're housed in.
Making brass instruments
The process of making the large open end of a
Brass instruments by a process of metal beating may be call
bellmaking.
In making the bells (open ends) of brass instruments, for example, trumpets, a person lays out a pattern and shapes
sheet metal into a bell-shape using templates, machine tools, handtools, and blueprints. The maker cuts out the bell blank, using hand or power shears. He hammers the blank over a bell-shaped mandrel, and butts the seam, using a notching tool. The seam is brazed, using a
torch and smoothed using a hammer or file. A draw bench or arbor press equipped with expandable lead plug is used to shape and smooth the bell and bell neck over a mandrel. A
lathe is used to spin the bell head and to form a bead at tip of bell head. Previously shaped bell necks are annealed, using a hand torch to soften the metal for further bending. Scratches are removed from the bell using abrasive-coated cloth.
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