A standard off-the-shelf Dowel
Bushing from Spirol Industries has
been specified to replace two solid
ground wall dowels used to align the
two side covers of the body of an oil
pump assembly. The solution has
reduced the cost per dowel by almost
50% and provided savings in overall
manufacturing costs.

In the original design, use of a
ground dowel required an accurate
hole that had to be reamed to the
correct dimension. Using a Spirol
Dowel Bushing, the customer no
longer needs a tight hole tolerance as
the dowel bushing acts as a spring
and will conform to the hole size.

The outside diameter of the bushing
will take the shape of the hole so long
as 60% of the length of the dowel is
inserted into the main component.