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hand methods to completely automated mass-production.
Traditionally cymbals were made from individually cast cymbal blanks, which were then hot-forged, often with many annealing processes, to form the rough shape of the cymbal.
The finishing stages consisted of cold-hammering to unevenly harden the metal, then turning on a lathe (known to cymbalsmiths as "lathing") to reduce the thickness, and then often a final cold hammering after lathing.
The hot hammering and cold hammering were all performed entirely by hand, a highly skilled and labour-intensive process. The only machine to touch the cymbal was the lathe, and even then the lathe tool was held in the hand.
This lathing step could reduce the weight of the cymbal by two-thirds or more, and resulted in further uneven hardening which produces much of the tone of a traditionally-made cymbal. This effect was deliberately enhanced by use of a course lathe tool, and by very limited if any final polishing, leaving the lathe tool marks as "tone grooves". Traditional cymbals were lathed over the entire surface top and bottom.
Some cymbals are still made in exactly this way today, especially in the top price ranges.
Each stage of this process has been modified by the use of recent technology.
One of the main effects has been that far closer manufacturing tolerances could be achieved. These have sometimes been reflected in more consistent sounding cymbals, and sometimes not. The ear, it seems, is sometimes far more sensitive than the micrometer in measuring differences between cymbals.
This has also provided the opportunity to omit some of the traditional steps completely, and so unlathed, partly lathed, and even unhammered cymbals have entered the catalogs of major makers, and achieved rapid acceptance.
Two modern techniques now provide an alternative to the traditional casting technique.
The more unusual of these is rotocasting, in which the mold is spun to force metal into the details of the mold by centrifugal force. This allows the hot forging step to be reduced or even omitted, as the resulting casting can be made far closer to the final shape of the cymbal, including its bell and taper. It is an expensive process used for a few top quality bell bronze cymbals only.
Many modern cymbals are stamped from sheet metal. Since only malleable alloys can be cold rolled into sheets, there is no commercially available bell bronze in sheet form, but cymbals of all other common cymbal
alloyshave been produced in this way.
Some claim that these "sheet" cymbals have a different sound to traditionally made cymbals, owing to their manufacture from sheet metal rather than from individual castings. Others claim that the only difference is the
alloy.Top quality "cast" cymbals are normally made from bell bronze, while "sheet" cymbals are normally made from malleable alloys.
The major manufacturer Paiste even claims that the division into cast and sheet cymbals is misleading, as all alloys are at some stage cast, and refuses to say whether or not particular cymbals are made from sheet metal. Their Sound Alloy patent implies that they have a method for making sheet metal cymbals of this alloy, which would make these a unique third category.
The 2002 Paiste Cymbal Guide even claims that all cymbals are "cast", not just their own, but here they are not using the word in the established sense. All other manufacturers openly state that all of their malleable alloy cymbals are made from sheet metal, and that all of their bell bronze cymbals are individually cast. One possible reason for Paiste's claims is that there is still a great deal of prestige associated with traditionally cast cymbals. The first sheet cymbals were brass, and were very cheaply made. It is only in the last few decades that top-quality sheet cymbals have been produced at all.
But whether this prestige is still deserved is doubtful. The major manufacturer Meinl manufactures both cast and sheet cymbals, and currently chooses to make their top premium line from sheet bronze. Some top drummers who play Zildjian or Sabian cymbals now choose to play their sheet bronze cymbals, rather than their more expensive cast cymbals, for the sake of their sound.
Louder drummers tend to choose sheet cymbals, while jazz players and major orchestras still tend towards cast cymbals. So it is more a matter of choosing the correct cymbal for the sound required.
Some manufacturers of bell bronze cymbals now use hot-rolling and hot-pressing of individual cymbal blanks rather than traditional forging. These processes are faster and cheaper and appear to have little if any effect on the final sound.
This is another controversial subject. Many manufacturers claim that their cymbals are "hand hammered", but again these words may not always mean the same thing. Some hand hammered cymbals are hammered using a hammer held in the cymbalsmith's hand. Others are hammered using a proprietary machine, but are still described as "hand hammered" because the hammering is under the control of an individual craftsman.
In general, truly hand hammered cymbals tend to have darker, lower, richer tones, and there tends to be far more variation in character between cymbals of supposedly identical models.
Conversely, cymbals hammered by automated machines tend to be brighter, higher in pitch, and more cutting. Most significantly, the variation between supposedly identical cymbals is noticeably reduced, assuming adequate quality control.
And not surprisingly, cymbals hammered by proprietary "hand" hammering machines are somewhere in the middle.
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