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NEMA 8 Standard Hybrid Stepper Motors

Mini stepper motor, Small size, High torque, Smooth movement, Step Angle: 1.8°, NEMA8, 20x20mm
● Holding torque up to 58mNm (8.2 oz-in)
● Available options for Wire Harness, Flexible Coupling
● Variety of mounting connection modes: facing forward, out the side of the motor, or out the rear of the motor for flexibility and space savings
Brand Name: MOONS'
Price: USD  49.5  -  59.5  EA

* Free shipping to North America and most of Europe for orders of $100 or more

Payment Methods

Buyer Protection:
Free Exchange if the item has quality problems within 1 year. Learn more

MOONS' MS08HY series is a compact size HB step motor specifically designed to be applied in small precision instruments. Continuous investment in product research, and advanced electromagnetic simulation has allowed MOONS' to optimize its performance. As a result the new MS08HY series motor is a compact, high efficient, high performance step motor. This design also allows for more mounting and connection options to best fit any application.

High Torque

Optimized magnetic circuit design gives higher efficiency and higher torque.

Compact Structure – Save Space & Weight

MS08HY series has a smaller body diameter compared with conventional designs. The diameter is reduced from Φ27mm to Φ22mm. Its volume is 18.5% lower and its weight is approximately 10% less than conventional motors. This helps to achieve the customer's requirement for smaller and lighter solutions to better improve their products.

Flexible Machine Designs

MS8HY series has two flange options: square flange and round flange. The square flange option has the same mounting as conventional Nema 8 designs. The round flange is a MOONS' innovation to save even more space, further reduce weight, and allow these motors to take the place of other round motor technologies. Combined with multiple wire outlet options, it lets customers easily design very compact equipment and meet the requirement of high-tech applications such as portable medical equipment, surveillance cameras, electronic microscopes, actuators, etc.

Variety of Mounting and Connection Modes

· Square Flange MountingThe square flange is a standard HB Step design. MS8HY series square flange design provides the option of two square mounting dimensions : 15.4mm or 16mm,covering all requirements in the market.
· Round Motor Flange MountingMOONS' has developed an innovative round flange design that perfectly matches the new stator lamination. This standard mounting plate allows the mounting screws to be assembled from the same side as the motor, which can make it easier to install as well as makes the entire body very compact. MOONS' can also provide customized mounting solutions based on the specific application by using a separate mounting plate.
· Lead Wire and Plug Connections Lead wires provide a permanent connection to the motor. They can be customized in any lead length with connectors provided on the end of the leads as an option. This allows the motor to be connected directly to the motor drive.
There are three ways to connect plugs to a motor: forward, out the side, or rear. The rear-facing connector is confined entirely within the motor body shape. This allows for further flexibility and space savings.

Mounting and Connection Options

Customers now have the flexibility to design small, compact equipment that is easy to assemble.

· Square Flange
· Round Flange

Customized Motor & Recommended Options

These motors are routinely used in low to high-volume production applications. Our Standard motors offer standard customizations and come with extended customer and product support. Customizations available include motor windings for optimal performance under your specific operating conditions, various shaft customizations, and customized motor leads and connectors.

· High Accuracy in Closed Loop Control(Encoder Required)

MS8HY series stepper motors are small in size, but can still be equipped with photoelectric rotary encoders. By implementing a closed-loop control system for the engine, the customer can achieve higher reliability and efficiency than an open-loop system. Also, this closed loop system has further advantages of low vibration、low heating, and stable stopping.· Mounting Dimensions of Encoder· Recommended Encoders
Product: photoelectric rotary encoder
resolution:1000 P/R
voltage:4.5 ~ 5.5 VDC
input current:60 mA (Max)
response frequency:220 kHz
operating temperature:-20 ~ +85℃

· MS8HY Series Stepper Motor + Planetary Gearhead

Compact and lightweight assembly increases the output torque with low gap, high efficiency and low noise.· Recommended Gearhead
Gearhead Data
Reduction Ratio   4:1 16:1 64:1 256:1
      22:1 90:1 361:1
        107:1 509:1
Number of stages   1 2 3 4
Max. continuous torque Nm 0.20 0.40 0.60 0.80
Max. intermittent torque Nm 0.30 0.60 0.90 1.20
Weight g 34.3 34.6 54.4 64.0
Max. efficiency % 84 70 59 49
Gearhead length L mm 17.7 22.9 28.1 33.3
Planetary gearhead   Straight teeth
Output shaft   Stainless steel, hardened
Bearing at output   Sleeve bearing
Radial play mm ≤ 0.1
Axial play mm ≤ 0.35
Max. radial load N 8 (5mm from flange)
Max. axial load N 15
Max. force for press fits N 100
Recommend input speed rpm ≤10000
Direction of rotation (drive to output)   =
Ambient temperature -20~+60
· Dimension

Specification of NEMA 8 Standard Hybrid Stepper Motors


Phase 2
Steps/ Revolution 200
Step Angle 1.8°
Step Accuracy ±5%
Insulation Class B, 130℃
Insulation Resistance 100 MegOhms
Axial Load (20,000 hours at 1000RPM ) 6N (1.3 Lbs.) Push
25N (5.6 Lbs.) Pull
Radial Load (20,000 hours at 1000RPM ) 18N (4 Lbs.) At End of Shaft
Operating Temp. -20℃~50℃
IP Rating IP 40
Approvals RoHS

Model Numbering System

Model Numbering System of NEMA 8 Standard Hybrid Stepper Motors

NEMA 8 Series – 4Lead Bi-Polar

Length Model Number Torque
Connect Rated
Rotor Inertia Motor Weight
Single Shaft P=Side plug
F=Front plug
R=Rear plug
mNmoz-in g cm²oz-in² kgLbs
MS08HY1P4050 Torque Curves of MS08HY1P4050 P 0.5 0.0324.53 8.65.6 20.28 1.60.009 0.040.09
MS08HY1F4050  of MS08HY1F4050 F 0.5 0.0324.53 8.65.6 20.28 1.60.009 0.040.09
MS08HY1R4050 R 0.5 0.0324.53 8.65.6 20.28 1.60.009 0.040.09
MS08HY3P4060 P 0.6 0.0496.94 6.64.1 30.42 2.90.016 0.060.13
MS08HY3F4060 Torque Curves of MS08HY3F4060 F 0.6 0.0496.94 6.64.1 30.42 2.90.016 0.060.13
MS08HY3R4060 Torque Curves of MS08HY3R4060 R 0.6 0.0496.94 6.64.1 30.42 2.90.016 0.060.13
MS08HY5P4060 s of MS08HY5P4060 P 0.6 0.0588.2 86.1 40.57 4.20.023 0.080.18
MS08HY5R4060 Torque Curves of MS08HY5R4060 R 0.6 0.0588.2 86.1 40.57 4.20.023 0.080.18
MS08HY5F4060 Torque Curves of MS08HY5F4060 F 0.6 0.0588.2 86.1 40.57 4.20.023 0.080.18

Compare Item Price
Buy Now
MS08HY1P4021 $49.50
MS08HY1R4050 $49.50
MS08HY1F4050 $49.50
MS08HY1P4050 $49.50
MS08HY1P4070 $49.50
MS08HY1P4100 $49.50
MS08HY3R4065 $55.00
MS08HY3F4065 $55.00
MS08HY3P4065 $55.00
MS08HY3P4090 $55.00
MS08HY5R4060 $59.50
MS08HY5F4060 $59.50
MS08HY5P4060 $59.50
MS08HY5P4090 $59.50

MS08HY1P4021Bipolar torque speed curves
MS08HY3P4027 Bipolar torque speed curves
MS08HY5P4028 Bipolar torque speed curves
MS08HY1P4050 Bipolar torque speed curves
MS08HY3P4045 Bipolar torque speed curves
MS08HY1P4100-MS08HY1P4070 Bipolar torque speed curves
MS08HY3P4090-MS08HY3P4065 Bipolar torque speed curves
MS08HY5P4090-MS08HY5P4060 Bipolar torque speed curves


Dimensions of NEMA 8 Standard Hybrid Stepper Motors
Dimensions of NEMA 8 Standard Hybrid Stepper Motors
Dimensions of NEMA 8 Standard Hybrid Stepper Motors
■ Mating connector With Leads(order separately) Dimensions: mm(in)

Mating connector With Leads(order separately) Dimensions: mm(in)

2D Drawings
3D Model
Title Type Size(KB) Download
Hybrid Stepper Motor_Catalog2019.pdf PDF 15487

With years of expertise and experience in the design, development, manufacturing and marketing of hybrid stepper motors, MOONS' provides a wealthy customized services, therefore, you can find suitable solutions for any special demands here.

Step Sequence & Schematic Diagrams

NEMA 8 Standard Hybrid Stepper Motors Step Sequence & Schematic Diagrams


Delivery & Packaging

Logistics tracking

Ensure your ordered products are always safely packaged from easy click to fast delivery to your hands

Professional Product Label

Considering all possible harsh application environments, MOONS' specially designed labels for each product, which pass water-resistance test, durability rub test, high temperature resistance and corrosion resistance tests.

Besides, our product labels are attached with QR code linking to product details, which is convenient for clients to view the detail product page with their mobile phones.

Note: This label design is suitable for products of stepper motor.

(Professional packing box and unique appearance design)

(Single item packed with EPE)

(Multi-products packed with another box)

Safely Packaging

In order to ensure your shipments withstand the long trip and arrive safely and intact, MOONS' specially designed Individual package to pass the drop test with its stable structure.
Besides,the package is made from recyclable materials, providing you with professional safety delivery.
Whether just single item or multi-products the clients buy, all products are packed twice to avoid the damage further.

Shipping Visualization

For each case, products are carefully packed by experienced warehouse staff and the key processes are recorded by photos, which are then posted on our website, so that clients could clearly know the packing process and logistics status after placing order.

(Product in the box)

(Add the invoice)

(Label the commodity)

(The logistics waybill attached)

Fast Delivery

Fast Cross-Border Delivery
MOONS' chooses DHL as our main international express shipping partner. As the world's leading logistics specialist, DHL provides our customers with fast and professional inter- national door-to-door delivery service.
Estimated Delivery Time: e.g. China-USA major cities 3 business days.

Warehouse Management

MOONS’ has an experienced warehouse management team, all products and materials are clearly classified and neatly arranged.