Product Description:

The CTP20NLF04NAA00 is a Size 23 hybrid stepper motor manufactured by Kollmorgen and supplied through the CT Stepper Motors series. As part of the Cool Torque Performance series, it is intended for precise incremental positioning in industrial automation where open-loop speed and position control are sufficient. Its short-stack frame and smooth round shaft allow direct coupling to small actuators or belt drives, and the NEMA through-hole mounting pattern supports quick installation into motion stages and light conveying fixtures.

Electrically, the motor uses a four-lead arrangement that mates directly with bipolar drives. Each phase draws 0.45 A DC, and the 40.6 Ω resistance at 40 °C limits copper loss. A phase inductance of 89 mH moderates current rise. The laminated stack produces 0.71 N-m of holding torque, whereas detent torque is only 0.04 N-m for smooth indexing. With a basic step of 1.8°, 200 positions per revolution are available before microstepping. The short stack length keeps rotor inertia low, and the Size 23 frame matches standard NEMA 23 adapters. NEMA through holes form the mounting pattern, and there is no rear configuration, leaving space for an encoder. Axially, the shaft tolerates 50 lbs in either direction, which suits belts or short lead screws.

The rotor inertia of 0.000018 kg-m² allows rapid acceleration when paired with light loads, while the motor’s body spans 57.2 mm across the mounting face and weighs 0.45 kg, keeping mass low for small gantries. Radial loading at the shaft center is limited to 20 lbs (9 kg), which helps prevent premature bearing wear under belt tension. The round shaft measures 6.35 mm in diameter and extends 20.57 mm beyond the front face. Thermal resistance is 3.99 °C/W, so surface temperature rises are predictable at the rated losses, and the insulation system is qualified for 340 VDC to accommodate higher bus voltages on microstepping drives.