Studer S131R Grinds Hard Materials Typical of Dies


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United Grinding’s Studer S131R, a radius internal cylindrical grinding machine, is well-suited for making dies out of hard materials such as tungsten carbide and ceramics. The machine enables shops to generate diameters, cones and transitional radii with polished surface quality through B- and X/Z-axis interpolation. The machine is also useful for general grinding applications involving hardened steel, cast iron and copper. The S131R provides single-clamping production of complex workpieces with tapers between 20 and 90 degrees, according to the company.

The automatic, direct-drive B axis provides thermal stability, mechanical rigidity and interpolation throughout its swivel range from -60 to +91 degrees, while the workhead C axis enables form and thread grinding. The other axes use linear drives. The swiveling spindle turret (-50 to +280 degrees) can be equipped with up to four grinding spindles. Temperature-stabilized components increase precision, while a Granitan S103 mineral casting machine bed damps vibration.

With a swing diameter of 11.8" (300 mm) above the table, an X-axis travel measuring 13.780" (350 mm) and a Z-axis travel measuring 15.748" (400 mm), the S131 can machine external diameters ranging to 6.3" (160.02 mm) with an external grinding wheel measuring 9.8" (248.92 mm) in diameter. The S131R accommodates parts of lengths ranging to 11.8" (299.72 mm) and weighing up to 220 lbs (99 kg), including the clamping device.