● Comparison of axial force generated by difference of surface treatment
Causes of seizing and sticking include frictional heat generated on the thread surface during tightening.
It can be confirmed from the above test results that the reducing the friction coefficient on thread surface by
special surface treatment will achieve higher axial force than screws with no surface treatment subject to the
same tightening torque.
As a result, it is possible to suppress the frictional heat with smaller tightening torque to prevent seizure and sticking.
● Comparison of spectral reflectivity generated by difference of surface treatment
Spectral reflectivity of low temperature black chrome treatment and stainless steel black is extremely low and optimal for optical equipment that requires prevent irregular reflection.