Special pin design
September 1st 2007 To solve a problem faced by a
manufacturer of diesel fuel
injection assemblies, Spirol has
developed a special helical
grooved pin.
The pin has wide grooves and
low profiled peaks that spiral
around the body of the pin and
create broad bearing surfaces.
This eliminates skiving of the holes
and deformation of the pin and
host during installation, preventing
slivers getting into the assembly.
The company says the insertion
force for the pin is about equal to
the 3-coil coiled pin previously
used for the application and 25%
lower than that of a traditional
grooved pin. A further benefit is
that there is minimal variation in
insertion force, with insertion and
removal forces about the same.
As the Spirol pin is solid, heat
treated 6150 alloy steel, its shear
strength is about 30% higher than
that of the 3-coil pin
previously used.
This is resulting in
reduced repair and
replacement costs of
the injector
components. More articles from Spirol Industries Limited: | 
