Data Sheet

SHERLINE STEPPER MOTOR SPECIFICATIONS—NMB MOTORS
Sherline P/N: 67127 (w/ DIN plug and flats of shaft)
67130 (no plug, flats on shaft)
Manufacturer: NMB (Minebea Co. Ltd.)
Mfg. P/N (Type): 23KM-K035-62V (double shaft)
Frame size: NEMA #23
Step angle: 1.8°
Voltage: 3.2 V
Current: 2.0 A/Φ
Resistance: 1.6 Ω/Φ
Inductance: 3.6 mH/Φ
Holding torque: 9.7 kg-cm
Rotor inertia: 250 g-cm
2
Number of wire leads: 6 (See color code diagram below)
Weight: 1.32 lb (0.6 Kg.)
Length: 2.13" (54 mm)
Shaft: Double ended, 1/4" dia.
FIGURE 1—Motor torque curve
FIGURE 2—Color of wires, NMB motors.
NOTE: Motors can be wired in either unipolar or bipolar configuration depending on how the leads are
connected. Sherline motors with plugs are wired for unipolar operation.
PRECAUTIONS
• Make sure the ends of raw wires are not touching each other when turning the handwheel by hand to
drive the stepper motor and leadscrew. It can cause the motor to feel rough and hard to turn.
• DC motors generate current when hand cranked that can damage the control unit. When positioning a
stepper motor by hand using the handwheel, do not crank faster than about 1 rev/second. For long travels,
use the jog mode of your CNC control software.
• Poor connections can cause arcing, which can burn out motors or control chips. Always make sure plugs
and connections are fully engaged and making good contact.
• Always turn off driver box power before plugging in or unplugging a stepper motor.
Sherline Products, Inc. • 3235 Executive Ridge • Vista • CA 92081-8527 • Internet: www.sherline.com
Ph: [phone] • Fax: [phone] • Orders: [phone] • E-mail: [e-mail]
6/18/08