Product Description:

The AKMH42J-ACKNCA1K is a hygienic stainless steel washdown servo motor manufactured by Kollmorgen for the AKMH Stainless Servomotors series. It drives sanitary conveyors, fillers, and pick-and-place axes where vigorous cleaning is routine. A 1.4404 (316L) stainless housing, a shaft seal, and an FDA-approved flange O-ring safeguard internal components, while the Smart Feedback Device (SFD3) encoder supplies digital position data to AKD drives through a pre-assembled 1 m cable. This motor is intended for food, beverage, and pharmaceutical machinery that needs corrosion resistance as well as repeatable servo response.

Its electromagnetic section delivers a continuous stall torque of 3.37 N-m with a phase current of 8.11 Arms. The winding torque constant is 0.424 N-m/Arms, and it is paired with an inductance of 3.1 mH and a DC resistance of 0.82 Ω, which influence current rise time and copper loss. A back EMF constant of 27.5 Vrms/kRPM assists the drive in precise speed regulation. The 10-pole rotor carries 0.000145 kg·m² of inertia and length code 2, allowing rapid acceleration within the 51 min thermal time constant and 0.87 °C/W thermal resistance. Mechanical integration uses IEC flange mounting in IM B5 style with an 80 mm pilot diameter, and surface roughness is kept below 0.8 µm to help prevent bacterial retention during washdown cleaning.

For short bursts, the motor supplies 11.51 N-m of peak torque at a 33.6 Arms surge, and it does not include a holding brake. The enclosure meets the IP69K rating, and the stainless body, mineral-filled PTFE cable jacket, and closed-keyway shaft help resist high-pressure water and chemicals. That shaft measures 19 mm in diameter and exits a flange that spans 114 mm, matching the AKMH4 frame size and DIN 748 / DIN 6885 T1 standards. The encoder provides 11-bit resolution, and the O-ring sealing suits hygienic automation where corrosion resistance and precise motion are required.