CTM21NLS19NAA00 Kollmorgen
Wake Industrial LLC is not an authorized distributor of this product.
Wake Industrial LLC is not an authorized distributor of this product.
The CTM21NLS19NAA00 is a stepper motor from the CT Stepper Motors series, manufactured by Kollmorgen. It features a NEMA size 23 frame, 200 full steps per revolution, and a step angle of 1.8 degrees. The motor delivers a bipolar torque of 1.84 N-m and supports an axial shaft load of 50 pounds in both directions.
Internal Product Review
The CTM21NLS19NAA00 is a Kollmorgen CT stepper motor engineered for precise motion control with a 1.8° step angle and ±3% step accuracy. The 2-phase design and 1.9 A rated current per phase support smooth, dependable performance in positioning applications. Enhanced Cool Torque Maximum series characteristics and 1.84 N-m bipolar torque make this motor a strong choice for efficient, high-torque operation.
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Product Description:
The CTM21NLS19NAA00 is a two-phase hybrid stepper motor in the CT Stepper Motors series from Kollmorgen. Within an automated machine, this motor indexes a load through discrete angular steps, allowing a PLC or micro-step drive to position tooling or conveyor sections without feedback devices. The Cool Torque Maximum design raises torque density while keeping thermal rise low, so motion axes can fit into compact spaces and still provide repeatable incremental motion.
The motor body follows the NEMA through-hole mounting layout and has a frame envelope of Size 23 / 5.7 cm. Each electrical step equals 1.8°, resulting in 200 full steps per revolution, and this geometric division simplifies open-loop control algorithms. Driving current is limited to 1.9 A per phase, a value that matches mid-range micro-stepping drives and keeps copper losses within safe limits. Coil copper presents a resistance of 2.44 Ω, so the drive must source sufficient voltage to reach rated current quickly. The inductive component of each phase is 3.7 mH, which affects the electrical time constant and influences the highest step rate that can be commanded without torque roll-off. Six pre-tinned lead wires provide flexible connection to bipolar or unipolar drive topologies, and insulation is rated for 340 VDC with 100 MΩ resistance to ground.
An axial thrust limit of 50 lbs in either direction allows the round smooth shaft to carry moderate belt tensions, while the radial rating of 20 lbs at the shaft center supports side-loaded pulleys. Low rotor inertia of 0.0035 oz-in-s² enables rapid acceleration between step commands and reduces settling time, which is important when the ±3% step accuracy must be met in high-speed indexers. The single-stack construction, combined with a thermal resistance of 3.57 °C/W, confines heat to the motor frame so that the overall unit weight stays at 1.5 lb, easing gantry or pick-and-place payload calculations.
