STUDER S 20-OF is a cylindrical grinder of high precision, engineered for excellent accuracy and reliable operation. Centre height 80 mm, distance between centres 400 mm, max longitudinal travel 420 mm, max transversal travel 30 mm; grinding wheel Ø350×30 mm, bore 127 mm, wheel speeds 1,600–2,200 rpm (peripheral speed 30 m/s). Workpiece spindle 4-step 80–800 rpm, swivelling range 0–90°; table angular displacement up to 30°; collet type W20, spindle taper 4 CM; table speed stepless up to 4 m/min. Voltage 3×380 V 50 Hz, air 5 bar; grinding wheel motor 3 kW, workpiece spindle motor 1 kW; weight ≈1000 kg; machine 1500×1100×1500 mm; control 600×600×1700 mm. Accessories: coolant system, paper filtration, set of collets; without tailstock. Achieves tight tolerances; typical applications: automotive, aerospace, toolmaking, medical.