The SV-20 honing system combines Sunnen’s new linear servo-stroking technology with the power and capacity to drive multistone diamond tools for OEM-quality bore geometry on automotive/truck blocks, cylinder liners, and similar large parts. According to Sunnen, the SV-20’s design with class-leading price and features, such as computer-controlled spindle and stroke control, is developed specifically for race shops, production rebuilders, and fleet maintenance facilities. The 30-in (762-mm) X-axis, 1500-lb (680-kg) weight capacity, and 20-in (508-mm) stroke length machine accepts blocks as large as the Caterpillar 3126 inline six and Ford 7.3 L V-8 (International 444). Even “mountain motors” with deck plates can be honed in one setup on the rollover fixture, claims Sunnen. Equipped with a variable-speed 15-600 rpm, 5.5-hp (4.1-kW) spindle motor, the SV-20 is powerful enough to drive two-stage diamond honing tools through a 20-in (508-mm) stroke at up to 100 strokes per minute for short cycle times and minimal labor.