en.Wedoany.com Reported - EMAG LLC, the North American subsidiary of the EMAG Group, has announced the launch of the UG series universal cylindrical grinding machines for the US and Canadian markets. This universal cylindrical grinding machine series enables manufacturers to achieve flexible, high-precision machining in internal, external, and non-circular grinding, eliminating the need to purchase multiple specialized machines for different applications.
The UG series comprises four models—UG 400, UG 630, UG 1000, and UG 1500—with grinding lengths of 400, 630, 1000, and 1500 millimeters respectively. The series offers various wheel configurations, serving job shops, precision parts manufacturers, mold makers, and production facilities within the automotive, aerospace, and industrial supply chains.
The grinding head on each machine is equipped with a direct-drive motor spindle rated at 11 kW, achieving a wheel surface speed of 50 meters per second. Eliminating the belt drive removes a source of vibration and mechanical power loss found in conventional cylindrical grinding systems. The automatic swiveling B-axis offers stepless positioning from -15° to +225° with a resolution of 0.0001° and a positioning repeatability of ±2 arc seconds; the 180° repositioning time is 8 seconds for all four models.
Precision tapered roller bearings within the workhead achieve a concentricity accuracy of 0.5 microns on test workpieces. The workpiece spindle is directly driven, with steplessly adjustable speeds from 30 to 800 RPM, and a swivel range of 0° to +30° to support taper grinding. The UG 400, UG 630, and UG 1000 are equipped with high-frequency internal grinding spindles, featuring a speed range of 20,000 to 125,000 RPM and utilizing oil-air lubrication. An optional C-axis workpiece spindle enables non-circular and thread grinding by synchronizing workpiece rotation with grinding spindle feed, requiring the FANUC 31iB Plus control system.
The tailstock features a precision-mounted quill (60 mm diameter, MK4 taper; 65 mm for the UG 1500), with a micro-taper correction range of ±40 microns and concentricity of less than 1 micron. Manual or hydraulically actuated options are available, supporting three dressing configurations: a repositionable table-mounted swivel arm dresser, a workpiece spindle dresser system for automated batch production cycles, and a dressing plate holder for supplementary or manual dressing.
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