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THE COMPANY
The Manufacturing Process…
In order to ensure optimum quality control, ARP has
grown to be exceptionally self-reliant and now controls
all aspects of the manufacturing process. All operations
are performed in-house and closely monitored. This is
how ARP has been able to establish a reputation for “zero
defects” quality throughout the industry.
The process begins right at the mill, where ARP orders
only premium grade materials including several propri-
etary alloys. The ever-popular 8740 chrome moly steel, for
example, comes from the mill in four distinct grades. The
lowest is “commercial,” which is followed by “aircraft quality.”
ARP uses only the top two grades (SDF and CHQ), which
cost twice as much, but provide the foundation for defect-free
fasteners. These materials come in bar stock (for studs) and
huge coils (for bolts).
Transforming raw material into a fastener begins with
“hot” and “cold” heading processes. Material is fed into pow-
erful devices and cold forged, or induction-heated and formed
under tons of pressure.
An overview of part of ARP’s expansive machining operations. The shop
is laid out for optimum efficiency.
Some bolts begin as induction-heated lengths of
bar stock that are forged on huge presses with the
desired head shape.
Material comes from the
mill in large coils...which
subsequently will be fed into
cold-headers and formed into
bolts.
ARP’s bank of cold-headers can handle material up to 5/8˝ diameter
and form bolts in a multi-phase operation.
Lengths of bar stock are automatically fed into special machines and
cut to the appropriate length.
