Swiss screw machines and high speed CNC machining
A Swiss-type screw machine is an automatic lathe that has a
sliding headstock and a guide bushing. The sliding headstock is the
part of the machine that holds the bar stock (usually 12-foot metal
or plastic bars) and rotates it (usually 1000-10,000 RPM depending upon
the diameter and type of material). The cutting tools (brazed carbide
turning or cut-off tools or insert tools) move in and out of the material
to create required diameters while the headstock moves the material
forward to create required lengths.
machining and machine shop equipment
Unlike many other types of screw machines, Swiss machines generate the
features of the part by moving the material and the tool at the same
time. Other types of screw machines often create part shapes by making
a form tool with the shape of the part in the tool.
machine products and machined parts
The headstock contains the collet, which clamps the material. The material
is then fed through a guide bushing, which is usually made of carbide.
The bushing is adjusted so that the material can slide through it, but
tight enough to keep the material from flexing away from the cutting
tool. The guide bushing allows Swiss-type screw machines to hold very
tight tolerances (+/- .0001") over long lengths in relation to
part diameter. For example, if you needed to turn a .100" diameter
over a 3" length, a Swiss-type screw machine is the only way to
do this. On a conventional lathe the material would bend away from the
Newer Swiss-type screw machines are CNC (Computer Numerical Controlled).
Older machines were cam operated, so each different part required a
new set of cams. With CNC machining you can sometimes switch parts with
the push of a few buttons. At our Swiss screw machine shop we still
run a few cam machines, but 99% of our work comes off of our new Star
CNC Swiss screw machines.
high speed machining
An advantage of our new CNCs is that they have automatic bar loaders.
When they finish a bar of material, they remove the remnant (the last
6" of a bar) and load a new bar, even if the machine operator is
on coffee break, eating lunch, or sleeping at home.
of precision Swiss screw machining
Swiss-type screw machines were developed in Switzerland to manufacture
watch parts. This allowed them to compete with American watch manufacturers
by making high precision parts in high volume. Most CNC Swiss screw
machines are made in Japan by Star, Citizen, and Tsugami.
– high speed CNC machining from a Swiss screw machine shop you
can depend on.
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