High precision, single stroke honing from Sunnen
Sunnen's high precision 'Single Stroke Honing' process is said to produce <2 micron cylindricity/straightness in bores up to 10 times longer than diameter. Developed to meet leak-free requirements for high pressure cast iron hydraulic valve bodies, the process is almost 200% more precise than previously achievable for long, small diameter, tandem bores.
Sunnen's Single Stroke Honing is a single-pass process that sizes and finishes a bore with a series of progressively larger superabrasive tools adjusted to a pre-set diameter. Single Stroke Honing tools rotate while passing through the bore once before withdrawing.
The company offers Single Stroke Honing on three different VSS-2 series machines that incorporate up to six spindles. The machines are suitable for precision sizing of bores 3.9-50 mm diameter in stamped parts, hydraulic valve bodies, gears, sprockets, parking pawls, rocker arms, turbocharger housings and similar components. Materials include cast iron, powdered metals, ceramic and graphite.
