The BI-05 Series slotless brushless DC motor is designed for maximum precision and performance. The slotless design eliminates the magnetic cogging typically found in conventionally wound "slotted" brushless DC motors. The stator teeth are completely eliminated by forming and encapsulating the entire stator winding along the inside surface of the back iron. The result is zero detent torque, low inductance and fast response rates. The body measures a compact 0.5 in. (12.7 mm) in diameter and is capable of no-load speeds up to 60,000 RPM. The miniature unit is rated for a continuous output torque rating up to 0.9 oz-in (0.0064 Nm). The construction is a combination of 17-4, 300 and 400 series stainless steels, the four-pole rotor is built using high-energy neodymium magnets, and an internal circuit board supports hall sensor feedback spaced at 120 electrical degrees.