NEMA stepper motor sizes
The NEMA (National Electrical Manufacturers Association) standard for stepper motor sizes specify the mounting dimensions based on model numbers. For example, NEMA 17 stepper motor meets the mounting size requirement of 1.7×1.7 inches (approximately 42.3mm). The NEMA standardization encompasses essential parameters such as hole spacing and shaft diameter. These standards not only harmonize crucial aspects such as mounting dimensions, hole spacing, and shaft diameter, but also influence motor performance through the base size. Larger NEMA stepper motor typically offer higher static and dynamic torque, enabling them to handle heavier loads. This standardized approach facilitates the motor selection process for equipment manufacturers and accommodates a wide range of applications, from miniature devices to industrial machinery, through a tiered system. 
As a leading supplier in the global motion control field, MOONS' develops its full ranges of stepper motors adhering to the NEMA standards. The product line spans from NEMA 6 to NEMA 42, catering to various applications that require high precision such as 3D printing, automated production lines, and medical equipment. The table below lists the specifications of MOONS' NEMA stepper motors, providing insights into the dimensions and specifications of each model. NEMA stepper motor sizes specification table:
*NEMA standard size matching the motor frame size MOONS' stepper motors have a significantly enhanced performance and application value through a series of technical optimizations and design improvements. In terms of power performance, the use of torque-enhancement technology ensures efficient output across all speed ranges. Additionally, a low-inertia design significantly improves acceleration capabilities. Combined with a low-loss magnetic circuit and high-voltage insulation design, these features further enhance high-speed stability and adaptability to high-voltage drives. Regarding core parameters, the optimized motor exhibit an average torque increase of over 20%, bolstered by a well-designed slot fill rate that strengthens low-speed torque output. In addition, a new naming system that incorporates winding parameters and standard options information offers greater transparency in motor selection. Together with standardized dimensions and high compatibility design, these motors are ideally suited to meet the precise driving requirements of sectors like industrial automation, medical equipment, and new energy. The above NEMA stepper motor size table is a summary table of MOONS' stepper motor sizes. For the latest specifications, please contact us directly.
As a leading supplier in the global motion control field, MOONS' develops its full ranges of stepper motors adhering to the NEMA standards. The product line spans from NEMA 6 to NEMA 42, catering to various applications that require high precision such as 3D printing, automated production lines, and medical equipment. The table below lists the specifications of MOONS' NEMA stepper motors, providing insights into the dimensions and specifications of each model. NEMA stepper motor sizes specification table: | Frame Size(mm) | Length(mm) | Stepper Motor Type | Step Angle | Rated Current(A) | Holding Torque(Nm) | ||
 | NEMA 6 | 14x14 | 30 | 2 Phase | 0.9° 1.2° 1.8° | 0.3 | 0.0058 |
 | NEMA 8 | 20x20 | 29.5~46.5 | 2 Phase | 0.9° 1.2° 1.8° | 0.21~1 | 0.028~0.058 |
 | NEMA 10 | 25x25 | 23.5~33 | 2 Phase | 1.8° | 0.25~1 | 0.045~0.096 |
 | NEMA 11 | 28x28 | 31~52 | 2 Phase | 0.9° 1.2° 1.8° | 0.24~1.5 | 0.072~0.17 |
 | NEMA 14 | 35x35 | 12.8~55 | 2 Phase | 0.9° 1.2° 1.8° | 0.26~2 | 0.044~0.4 |
 | NEMA 16 | 39x39 | 20.8~33 | 2 Phase | 1.8° | 0.27~1.5 | 0.098~0.27 |
 | NEMA 17 | 42x42 | 20.5~143.3 | 2 Phase 3 Phase 5 Phase | 0.72° 0.9° 1.2° 3.6° | 0.27~2.3 | 0.2~0.88 |
 | NEMA 20 | 50x50 | 40.3~56.3 | 2 Phase | 1.8° | 1~3 | 0.63~1.1 |
 | NEMA 23 | 56.4x56.4 | 39~112 | 2 Phase | 0.9° 1.8° | 1~5.5 | 0.59~3.4 |
 | NEMA 24 | 60x60 | 20.5~171.5 | 2 Phase 3 Phase | 0.9° 1.2° 1.8° | 0.8~5.5 | 0.38~3.3 |
 | NEMA 34 | 86x86 | 66.5~200 | 2 Phase 3 Phase | 0.9° 1.2° 1.8° | 1.6~10 | 2.8~15 |
 | NEMA 42 | 110x110 | 98.5~202 | 2 Phase | 0.9° 1.2° 1.8° | 2.1~16 | 12~32 |