thread is completely rolled in the same time it takes to
make one pass with a single point tool. That is a 90% (or more)
reduction in cycle time!
A rolled thread is more precise and
consistent than a cut thread, eliminating the need to closely
monitor thread making
production. By eliminating the need for constant size adjustments,
set-up and down time costs are reduced, resulting in a significant
On a cost per piece basis, thread
rolls cost less than carbide inserts. Furthermore, the non-abrasive
characteristics of the
thread rolling process results in less wear to the component
part, thus increaseing tool life. The inherent tensile strength
and fatigue strength under reversed bending stresses are
basic to the uninterrupted structure.
The burnished thread surface, with a roughness level of below
32 micro, improves resistance to corrosion and reduces abrasion
within the thread. Because minimal abrasion occurs when thread
rolling, profile accuracy increases.
The work hardened flank provides
increased surface tensile, yield, and shear strength. Due to
pressure deformation, a residual
compressive stress system builds up at the thread root, which
counter-acts tensile loading. When compared to a cut thread,
the load capacity of the rolled thread is increased by 5-15%.
Forming plastically and permanently displaces the component
material instead of cutting away material.