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nema 17 (42mm) high precision planetary gearbox (spxlrg42 l1 series)
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NEMA 17 High-Performance 2-Phase Stepper Motor (0.48 Nm) STM4238s

Model: STM4238S-0524CM | Industrial-grade NEMA 17 2-phase stepper motor delivering 0.48 Nm holding torque with a <0.3% defect rate, engineered for rigorous OEM integration.
  • CE
  • RoHS
  • ISO9001

Engineered for Uncompromising Stability & Zero Downtime

Engineered for precision motion control and ultra-reliability, the STM4238S-0524CM is a high-performance 42mm (NEMA 17) 2-phase stepper motor delivering 0.48 N.m of holding torque. Manufactured under strict ISO9001 protocols with an industry-leading defect rate of <0.3%, this motor utilizes optimized rotor inertia (54 g.cm²) and Class B insulation. It is the definitive choice for system integrators, CNC machinery builders, and OEM applications requiring continuous, drop-in operation without compromise. Fully compatible with standard industrial stepper drives, including the Sefowod DGD223M.

Key Engineering Advantages:

  • Industrial-Grade Durability: Features a black electrophoretic end cap and UL1430 AWG26 leads, ensuring maximum environmental resistance in harsh operational conditions.
  • Precision Motion Control: Delivers a 1.8° step angle with strict ±5% accuracy and minimal detent torque (2.2 N.cm Max), eliminating resonance and ensuring smooth, predictable rotation.
  • Optimized Thermal Performance: Engineered with a low phase resistance (1.72 Ω) and a 2.9V rated voltage, guaranteeing superior heat dissipation during heavy-duty continuous cycles.
  • Source Factory Flexibility: 100% proprietary engineering allows for deep-level OEM/ODM customization, including specific shaft modifications, wire harnessing, and complete white-label manufacturing.
  • Universal Integration: Standard NEMA 17 (42.3 x 42.3 mm) flange with 4-M3 mounting holes enables seamless deployment as a drop-in replacement or core component in new ecosystem builds.

Core Technical Specifications

Step Angle1.8° ± 5%
Static Torque0.48 N.m (48 N.cm) Min
Shaft Shaperound
Shaft DimensionsDiameter: 5 mm,Length: 24 mm ± 0.5 mm
Precision (arcmin)25
Reduction Ratios4:1, 5:1, 10:1
Matched Motor Series42
Supply_Voltage 2.9 VDC
Rated_Current1.68 A/Phase
Motor_Length:40 mm Max
Phase Resistance:1.72±10% Ω/Phase
Phase Inductance: 3.3±20% mH/Phase
Detent Torque: 2.2 N.cm Max
Rotor Inertia: 54 g.cm²
Insulation Class:B
Lead Wire: AWG26 UL1430
Surface Treatment:Black Electrophoretic End Cap
Recommended Driver: DGD223M

Scale Your Margins with Our OEM Program

Why settle for low margins? Build your own proprietary product line backed by our 100% independent IP and <0.3% defect rate manufacturing.

We provide deep hardware and firmware modifications that standard trading companies simply cannot offer. Stop competing on price and start dominating your local market.

  • white_label
  • custom_shaft
OEM MOQ starts at just: 100 pcs

Talk to a Senior Motion Control Engineer Today

Whether you need a standard turnkey package or deep firmware customization, our team is ready to assist. Response within 12 hours.

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