AKMH31C-CNKNGF7K Kollmorgen
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The Kollmorgen AKMH31C-CNKNGF7K is a hygienic stainless steel washdown motor from the AKMH Stainless Servomotors series. It features a continuous stall torque of 0.91 N-m and is constructed with 316L stainless steel housing for durability. The motor is equipped with an IP69K protection class and Hiperface DSL multi-turn encoder, and uses a smooth 14 mm shaft with FDA approved O-ring flange sealing.
Internal Product Review
The AKMH31C-CNKNGF7K is a hygienic stainless steel washdown motor with IP69K protection. A 316L stainless steel housing and an FDA-approved O-ring flange seal make the design especially well suited for sanitary processing equipment. The Hiperface DSL multi-turn encoder with 18 bit + 12 bit resolution supports precise feedback, a standout feature for controlled servo performance.
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Product Description:
The AKMH31C-CNKNGF7K hygienic stainless steel washdown motor is produced by Kollmorgen as part of the AKMH Stainless Servomotors series. Designed for direct integration with AKD drives, it combines a 1.4404 stainless steel housing, a smooth 14 mm shaft, and face mounting that follows IEC patterns to supply contamination-resistant rotary power in food, beverage, and pharmaceutical cells. The motor maintains precise closed-loop motion while tolerating daily high-pressure cleaning, so it fits sanitary production lines that cannot accept paint, coatings, or external junction boxes.
At stall, the motor delivers a continuous torque of 0.91 N-m while drawing a continuous phase current of 1.24 Arms; these values establish the steady mechanical output and electrical demand used when sizing the drive and power supply. A torque constant of 0.76 N-m/Arms links delivered torque to commanded current, allowing the controller to predict acceleration accurately. The back electromotive force constant is 54.5 Vrms/kRPM, establishing the generated voltage during rotation and the maximum speed permitted by the DC bus. Coil inductance of 37.5 mH moderates current rise time, shaping the bandwidth available for high-frequency position corrections and filtering switching ripple from the inverter.
During rapid indexing, the motor can reach a peak stall torque of 3.76 N-m and momentarily accept phase currents up to 5.48 Arms, providing reserve capacity for acceleration or overcoming static loads. The enclosure meets IP69K, so hot, high-pressure washdowns do not compromise the windings, FDA-approved flange O-ring, or shaft seal. Position feedback is provided by a Hiperface DSL multi-turn encoder with a combined resolution of 18 bits + 12 bits, supporting fine velocity loops and absolute position retention after power cycling. Low rotor inertia of 0.000033 kg-m² lets the axis reverse quickly with minimal overshoot, matching fast pick-and-place or indexing applications.
