Honing Two-cycle Engine Bores

October 9, 2009

Sunnen’s new TC tool is a custom-engineered system for the honing of small, two-stroke-cycle engine cylinders to overcome characteristic production challenges such as blind, ported, and tapered bores and hard surface coatings, such as Nikasil® and chrome plating.

This tool produces fractional micron (0.000040-in.) accuracies and specific surface finishes for increased power production, fuel efficiency, reduced emissions, and engine durability, the company reports.

Equipped with metal-bond superabrasives, these tools use customized abrasive mounting, which holds up to 12 stone segments of various lengths. Strategic placement of the abrasives produces roundness and a consistent finish from top to bottom in blind bores.

Sunnen custom-designs each tool by mapping the bore, creating a 2-D profile to determine optimum length and spacing of abrasives to balance tool wear and produce consistent bore geometry and dimensional accuracy over thousands of parts.

For more information, visit www.sunnen.com.