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Sunnen’s SV-30 Honing Machine Reduces Setup, Changeover Time

Westec 2019: The Sunnen SV-30 cylinder honing machine is designed for compressors, engine cylinder blocks, cylinder liners and other industrial parts.

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The Sunnen SV-30 cylinder honing machine is designed for compressors, engine cylinder blocks, cylinder liners and other industrial parts. There are six models in the series, each including a PC control with simplified menus and storage for more than 1,000 setups for easier changeovers. Several models incorporate step-and-repeat capability, enabling automatic bore-to-bore processing for in-line and V-block configurations, which reduces setup time and improves bore quality.

The SV-30 features spindle reversal, standard bore oversize setup (0.010"/0.020"/0.030") and automatic tool protection at the top and bottom of the bore, which verifies an unobstructed stroke before starting a cycle. Models include either a variable-speed 6-hp (4.5-kW) servomotor or 5.5-hp (4.1-kW) induction spindle motor, producing speeds from 50 to 600 rpm. A 3.4-hp (2.5-kW) servo ballscrew system produces up to 100 true vertical strokes per minute with a stroke length ranging to 27.75" (705 mm). The linear stroking drive maintains concentricity with the bore throughout the full stroke to produce a consistent diameter from top to bottom. The SV-30 can hone bores with diameters ranging from 0.75" to 8" (19 to 200 mm). A large, 48" × 30" (1,219 × 760-mm) work envelope provides versatility for processing large parts.

The spindle reversal feature duplicates the capabilities of machines used by automotive OEMs, the company says. Reversal can be helpful during finishing strokes, creating a slightly rounder bore and causing the honing stones to remove any less-than-round shape left after initial passes while shaping and dressing the stones themselves. Reversal also aids in removing folded metal and debris.