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Forged
Irons
As the
name suggests, these irons are forged as blacksmiths would
do. First of all dies are cut into the ironing by milling
the impression required and forging is then carried out using
a drop hammer. The raw forged iron is then finshed by grinding
and drilling to produce the clubhead desired.
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Muscleback
Irons (aka Baldes)
Generally
thought of as a forged iron, the distinction of the muscleback
iron is the clubhead design. The clubheads are designed so
that weight is distributed evenly throughout the head and
have a small "pure or sweet" spot in the centre.
Shots hit on-centre will have a long, stright flight, whereas
those off-centre will be shorter and more unpredicatable.
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Investment
Cast Irons
An aluminium
master of the clubhead is first produced with all the scoring
lines and markings required. Wax is then injected in to produce
a "positive" clubhead. This is then dippped in ceramic
to produce a "negative" mould. The ceramic is then
heated to melt the wax, which is removed and replaced by stainless
steel. Once the steel has cooled, the ceramic mould is removed
and the clubhead can be painted.
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Cavity
Back Irons (aka Perimeter Weighted)
Again,
generally associated with investment cast irons, the clubheads
of these irons are the distinctive element. Weight is distributed
around the perimeter of the clubhead and gives a larger "sweet
spot" than the muscleback irons. The result of this is
that off-centre shots will fly longer and straighter than
those of the muscleback iron.
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