Available in three frame sizes of NEMA 14, 17 and 23, Pittman’s Series 3400, 4400, and 5400 slotless brushless DC servo motors incorporate 3-phase slotless stators, 4-pole rotors, and neodymium magnets as standard. Depending on model, they can achieve a continuous torque up to 0.3 Nm. All versions feature internal Hall-sensor feedback motor commutation, high starting torque, and variable speed control with appropriate drive electronics. Other standard features include rugged construction, shielded ball bearings, and precision-ground hardened stainless steel shafts. Among available options are gearboxes, encoders, drives, and brakes. Modifications to the motor shaft, winding, and mechanical mounting allow for customization to suit application-specific requirements. The motor’s slotless design minimizes magnetic cogging, or reluctance torque. The result is enhanced servo efficiency and extremely smooth and quiet motion. Slotless motors also exhibit low inductance and high current bandwidth that provides precise control, especially during rapid acceleration in demanding incremental motion applications. In addition, their good winding heat transfer abilities promote high thermal efficiency and transient load capacity. The motors are used to power a wide range of applications for the medical/biotech, semiconductor processing, business and computer equipment, and automation industries, among others.