manufacturer
William Hughes has
invested in the latest CNC
technology machines to fully
automate its production
process.

For many applications,
double torsion springs
perform better than single
and as a result, they are
widely used in the
automotive industry. So
when a manufacturer of seat
and car interior parts needed
a double torsion spring for
the door handles of a popular
small car, it approached
William Hughes. Application
engineers designed the spring
to meet the exacting
specification of the car
manufacturer, while ensuring
that the spring would be easy
to manufacture using its
CNC machinery.

The spring is used inside
allthe
car to return the handle
to its normal position and is
designed to make assembly
into the car mechanism easy.

Despite the complex shape of
the central section of the
double torsion spring, very
little tooling was required.

By making the spring in
two fully automated stages,
the difficult central section
was easily formed to provide
a spring that is compact, cost
effective and durable. Springs
are protected by anticorrosion
paint containing
zinc flake.