Product Description:

Kollmorgen manufactures the CTP20NLF11NAA00, a hybrid stepper motor positioned in the CT Stepper Motors series and tuned for the Cool Torque Performance line’s high-torque objectives. The device translates drive pulses into firm 1.8° steps, enabling open-loop positioning in conveyor indexes, small actuators, and light gantries. A size-23 frame with a 57 mm square body and short-stack laminations keeps mass low and inertia compatible with quick acceleration. Installation is simplified by NEMA through holes, lead-type power connections, and a round smooth shaft that mates directly to couplings or pulleys without keyways.

The motor delivers a holding torque of 0.71 N·m in bipolar drive mode, allowing the rotor to hold position without additional gearing in many compact axes. Each revolution contains 200 full steps produced by a pair of windings whose electrical time constant is influenced by a 17 mH phase inductance and a 6.98 Ω phase resistance. These values let low-current drives shape current quickly while keeping copper losses moderate at the rated 1.1 A DC per phase. Voltage across the coils is nominally 7.4 V DC, and detent torque of 0.04 N·m provides minimal static drag between pulses. Four lead conductors exit the housing, and the motor has no rear extension, so cabling remains compact for embedded axes.

The aluminum case dissipates heat through a thermal path rated at 3.99 °C/W, helping keep winding temperature stable when the 0.45 kg body is mounted against a properly ventilated panel. Electrical insulation is verified at an impedance of 100 MΩ and a withstand level of 340 VDC, which suits basic industrial safety requirements for 24 to 75 V drives. Mechanically, the round shaft supports an axial thrust of 50 lbs in either direction and a center-loaded radial force of 20 lbs without bearing damage. The shaft can tolerate typical belt tension and routine production shock loads in compact motion assemblies.