NMB Small-Diameter PM Stepping Motors
NMB’s small-diameter PM stepping motors are miniature rotary components for compact optical and related OEM mechanisms. The range includes 3.4 mm through 10 mm examples with different body lengths, step counts and windings. These motors use external drive electronics; a miniature shaft and fine mechanism do not make the motor an integrated servo or a complete positioning stage.
Key Specifications
SM3.4-F20 | 3.4 mm diameter; 4.95 mm body length; 20 steps/revolution; 18° full-step angle |
SM4.3-F20 / SM5-F20 | 4.3 / 5 mm diameter; 5.65 / 5.95 mm body length; 20 steps/revolution |
SMSSH5-F20 | 5 mm diameter; 4.35 mm body length; 20 steps/revolution |
6 mm examples | SMH6-F20: 7.85 mm long; SMS6-F20/F40: 5.35 mm; SMSH6-F20: 5.35 mm; SMSSH6-F20: 4.35 mm |
8 mm examples | SMH8-F20: 9.30 mm long; SMSH8-F20/F40: 7.10 mm long |
SMC10-F20 | 10 mm diameter; 10.70 mm body length; 20 steps/revolution |
Step-count distinction | F20: 20 steps/revolution, 18°; F40: 40 steps/revolution, 9° for the listed configurations |
SM3.4 reference drive | 3 V bipolar constant-voltage arrangement; 25 Ω per phase; two-phase excitation |
Other reference windings | SM4.3-F20: 3 V, 23 Ω; SM5-F20: 3 V, 21 Ω; SMSSH5-F20: 3 V, 24 Ω; SMC10-F20: 5 V, 21.5 Ω |
Control scope | External phase driver/controller; position sensing or reference mechanism specified by the machine designer |
Price | Request a quote for exact motor, winding, shaft and lead configuration |
Applications and Industries
Manufacturer-documented application areas include camera lens barrels and optical-aberration correction mechanisms. These motors are components for OEM optical motion and related compact mechanisms, requiring the appropriate drive, mechanical support and position-reference design.
Industrial automation
Review Summary
Consider this family when motor diameter and axial space are critical, especially in lens or optical-adjustment mechanisms. Select the exact motor, lead arrangement and drive condition against the required torque at pulse rate. A smaller package, a higher step count and higher positioning accuracy are separate properties.
Price and Configuration
Request a quote for the selected configuration,quantity and delivery schedule. Confirm the exact model,options,integration scope and support terms.
