Cylinder Hone for Engine Configurations

Jan. 11, 2019

The Sunnen SV-30 honing series is the next generation in the line of legendary Cylinder King machines. True to its heritage, it achieves expert results on engine cylinder blocks, cylinder liners and other engine parts that require honing. Six standard models include four step-and-repeat capability versions allowing automatic bore-to-bore processing for in-line and V-block configurations, reducing setup time and improving bore quality. In addition, two models are available with a manual X-axis. The SV-30’s cylinder diameter range is 0.75 to 8.0 in. (19 to 200 mm) depending on the tooling option, and the new Sunnen GH-LF tooling is required for automatic step-and- repeat operation.


With six models in the series, the SV-30 can be tailored to meet the needs of manufacturers, job shops and automotive performance and rebuild shops.  It includes a new PC control with simplified menus and storage for 1000+ setups for quick and easy changeovers. When used with the wide range of Sunnen-made abrasives, tooling and coolants, the U.S.-built SV-30 produces ideal bore roundness and surface finish in a variety of part types and materials at an affordable price.


The SV-30 also includes spindle reversal, standard bore oversize setup (.010/.020/.030 in.) 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) servo 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 ball screw system produces up to 100 true vertical strokes per minute with a stroke travel of up to 27.75 in. (705 mm). The linear stroking drive maintains concentricity with the bore throughout the full stroke to produce a consistent diameter from top to bottom. A large, 48 x 30 in. (1,219 x 760 mm) work envelope allows versatility in processing larger parts.


The proven Phoenix industrial PC control ensures automatic, consistent bore-to-bore geometry and finish, without constant adjustment by the operator. The 15-in. (381 mm) color touchscreen with intuitive controls provides a real-time display of the full-bore cross section during the process. The control can store 1,000+ part setup programs, and a USB port allows offline setup file storage. The control's programmable Auto-Dwell feature automatically corrects taper anywhere in the bore for unattended operation, while two-stage honing tools with diamond or CBN abrasives can complete roughing and finishing operations in one pass for high productivity.


Left/right positioning of the honing column on its 32-in. X-axis (813 mm) is easily accomplished with a servomotor or a manual hand wheel located immediately below the operator station (model dependent). The machine is equipped with a 55-gallon (208-liter) internal coolant system with two standard steel canister cartridge filters, heavy-duty pump, and filter status gauge.


In addition to the GH-LF tooling (required for automatic step and repeat operation), the SV-30 is compatible with all Sunnen's current large diameter tooling. This includes diamond abrasive hone heads and brushes, GHSS single-stage hone heads with CBN or diamond abrasives and brushes, and GHTS hone heads for two-stage honing with CBN or diamond abrasives.


The SV-30 is equipped with new standard LED lighting in the work envelope. It also has the latest standard safety features including light curtain, interlocked front door, stainless guarding around the work envelope, and safety PLC which limits setup speeds in all axes. Options include a T-slot base (for custom fixturing), heavy-duty manual rollover cradle for engine blocks, and a full-feature automation interface.


The SV-30 is backed by Sunnen’s 3-year parts and labor warranty and is sold and serviced as part of a total solution that includes Sunnen-made abrasives, tooling, bore gauges, and coolants.