Two linear motors have been added to the SDLM series of high-speed, direct-drive linear motors, also known as electric cylinders. These compact drives with a 1-in. (25.4-mm) stroke are just 1 in. (25.4 mm) in diameter and 3.75 in (95.3 mm) long. The direct-drive linear motors feature resolutions of 5 µm (0.000197 in) and 1.25 µm (0.000049 in). The integral, linear optical quadrature encoder is connected directly to the shaft for accuracy. Each motor features a continuous force rating of 20.1 oz (5.82 N) and a peak force of 66.3 oz (18.4 N). This motor is designed with an air gap of 0.059 in (1.5 mm).