General Specification
The 57BYB Series Brushless DC Motors feature a delta winding type with a Hall effect angle of 120 degrees electrical. The radial play is 0.025mm under a force of 460g, and the end play is 0.025mm under a force of 4000g. The maximum radial force is 75N at 20mm from the flange, and the maximum axial force is 15N. The insulation class is B, with a dielectric strength of 500VDC for one minute and an insulation resistance of at least 100MΩ at 500VDC.

Performance Data
The motors have 4 poles and 3 phases, with a rated voltage of 24 VDC. The rated speed varies between 2000 and 4000 RPM, depending on the model. Continuous stall torque ranges from 0.192 to 0.684 N.m, while rated torque ranges from 0.16 to 0.57 N.m. Rated power output varies from 33.5 to 238 W. Peak torque ranges from 0.48 to 1.71 N.m, and peak current ranges from 6 to 42.5 A. The torque constant is between 0.04 and 0.08 Nm/A, and the back electromotive force (E.M.F) is 8.57 or 4.8 V/KRPM. Rotor inertia varies from 75 to 230 g.cm², and body length ranges from 82.5 to 142.5 mm. The voltage range is 12 to 80 VDC, and the speed range is 2000 to 4000 RPM. The weight of the motors ranges from 0.4 to 1.3 kg.

Model Variants
The document lists several model variants, including 57BYB054, 57BYB074, 57BYB094, and 57BYB114, each with different performance specifications such as rated speed, torque, and power output.