The Starrag Bumotec s191H is a Swiss-engineered, high-precision multi-task production center with a reputation for consistency that has made it a staple in medical, watchmaking, aerospace, and defense component shops. This 2020 s191H is configured with the 65 mm bar capacity main spindle, a direct-drive C-axis spindle rated at 15 kW and 6,000 RPM for turning with full milling indexing, and a direct-drive B-axis milling head that tilts from -25 to +115 degrees. The HSK-A40 milling spindle is rated to 30,000 RPM at 13 kW, and the machine supports up to 5 simultaneous axes for complete machining of complex geometries in one setup. Linear travels are X 16.1 / Y 7.9 / Z 15.7 inches (410 x 200 x 400 mm) with 1,969 IPM (50 m/min) rapids on all linear axes. A 90-position tool magazine handles large tool families, and the PRM retaking unit with a 13 inch (330 mm) W-axis stroke transfers the part for secondary operations on the back side. Control is a Fanuc Series 31i-Model B5. The package includes a Hainbuch SK65 bar clamping setup with five SK65 collets, an LNS ChipBlaster CBJVHP-40 high-pressure coolant system with chiller, an LNS MH500 chip conveyor, an LNS Fox HE-1000 mist collector, two vises, and a large HSK-A40 tooling package including Rego-Fix PG10 and PG15 holders, ER25 holders, grippers, insert turning holders, and cut-off holders.
Within the s191H family, Starrag builds the machine in 32 mm, 50 mm, and 65 mm bar capacity versions, and the 65 mm configuration is the heavy-duty choice. Starrag rates the 65 mm main spindle for 84 Nm continuous and 124 Nm peak torque, compared with 22 Nm and 36 Nm on the 32 mm version, and the 65 mm milling spindle steps up to 13 kW from the 8 kW spindle on the 32 mm machine. That added torque and spindle power lets the 65 mm s191H take on larger-diameter bar stock, tougher alloys such as stainless and titanium, and heavier milling cuts than the smaller versions, while keeping the same compact footprint, 50 m/min rapids, and five-axis B-axis capability. For a shop moving up from conventional multi-axis lathes or from a smaller-bar Bumotec, this configuration delivers more capacity per setup and a wider range of quotable parts.