Molon MMS-23018-1 Stepper Motor 23LM-C343-01 NEMA 23 Rare Earth Magnet Drive

Molon MMS-23018-1 Stepper Motor 23LM-C343-01 NEMA 23 Rare Earth Magnet Drive

The Molon MMS-23018-1 is a NEMA 23 frame permanent-magnet stepper motor built with rare earth magnets for high torque output relative to its compact size. It carries internal part number 23LM-C343-01 and reference number 127S80361 Rev. E, and was manufactured by Molon Motor and Coil Corporation in Singapore. The motor uses a laminated stator construction to minimize hysteresis losses and improve positional accuracy, and connects via a short 4-wire lead terminating in a 4-pin housing connector.

Specifications & What's Included

• Manufacturer: Molon Motor and Coil Corporation
• Model: MMS-23018-1
• Alternate Part Number: 23LM-C343-01
• Reference Number: 127S80361, Rev. E
• Frame Size: NEMA 23
• Magnet Type: Rare earth permanent magnet
• Stator: Laminated for low hysteresis
• Step Accuracy: 5%
• Output Shaft: Single, protruding — visible in photos
• Connector: 4-pin housing connector with red, blue, yellow, and white leads
• Country of Manufacture: Singapore
• Included: Motor with attached wire lead and connector only — no mounting hardware or documentation

Applications

NEMA 23 permanent-magnet stepper motors like the Molon MMS-23018-1 were widely used in high-performance disc drives — the original primary application Molon specified for this series — where precise angular positioning and repeatable step accuracy are critical. More broadly, NEMA 23 steppers are a standard building block in CNC machines, 3D printers, automated test fixtures, optical equipment, and precision positioning stages, and they remain in active use across these fields today. The rare earth magnet construction gives this motor a higher torque-to-inertia ratio than ferrite-magnet designs of the same frame size, which made it attractive for applications demanding fast acceleration and tight step control. The laminated stator further reduces iron losses, making it suitable for higher-speed stepping applications. Molon Motor and Coil Corporation, based in the Chicago area, has been producing specialty motors since the 1960s; this particular series dates from the mid-1980s based on the Singapore manufacturing origin and construction style.