New Generation NEMA 8 Stepper Motor

Nema 8 (口20mmX20mm), 2-phase, 1.8°

• Innovation round flange, motor body diameter is only Φ22mm
• 27%-40% more holding torque, up to 8.5 oz-in (60 mNm)
• 18.5% lower volume and approximately 10% less weight than conventional motors
• Innovation round flange provides flexible and customized mounting solutions
• 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
• Customizations available include motor windings, various shafts, motor leads and connectors and encoder & gearhead options

Quote a Standard/Specialty/Customized Motor

Features
Customization
Data Sheet
Dimension

MOONS’ MS8HY 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 MS8HY 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

MS8HY 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 allows 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 Mounting The 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 Mounting MOONS’ has developed an innovative round flange design which is matches perfectly to 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. The use of a separate mounting plate also makes it easy for MOONS’ to provide customized mounting solutions to fit the specific application.

• 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.
Plug connections now have the option of facing forward, out the side of the motor, or out the rear of the motor. 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

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As one of the largest integrated manufacturers of motion control and intelligent lighting products within China, MOONS’ has professional teams of research and development, manufacturing, sales and technical support all over the world. Our website (www.moonsindustries.com) is the first professional E-business platform in this industry, on which an extremely wide range of high performance motion control and intelligent lighting products are supplied to customers around the world. MAILLETTER SIGN UP

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Gearhead Data
Reduction Ratio		4:1	16:1	64:1	256:1
		5:1	19:1	76:1	304:1
			22:1	90:1	361:1
				107:1	428:1
					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	%	81	66	53	43
Gearhead length L	mm	17.7	22.9	28.1	33.3

Specification
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
Max. axial load	N	15(5mm from flange)
Max. force for press fits	N	100
Recommend input speed	rpm	≤10000
Direction of rotation (drive to output)		=
Ambient temperature	℃	-10~+60

Length	Model Number	Connect	Rated Current	Holding Torque		Winding	Rotor Inertia		Motor Weight
Length	Single Shaft	P=Plug L=Leads	Amps (mounted)	Nm Typ.	Oz-in Typ.	Ohms @20℃	g.cm²	Oz-in²	Kg	Lbs
30mm	MS08HY1	P	0.5	0.028	4	8.2	2.7	0.015	0.045	0.1
40mm	MS08HY3	P	0.5	0.046	6.5	14.1	3.6	0.02	0.062	0.14
47.5mm	MS08HY5	P	0.5	0.06	8.5	17.4	4.2	0.023	0.075	0.17

Phases	2
Steps/Revolution	200
Step Accuracy	±5%
IP Class	40
Approvals	RoHS
Operating Temp	-20°C to +50°C
Insulation Class	B, 130°C
Insulation Resistance	100 MegOhms
Shaft Load (20,000 Hours at 1000 RPM)
Axial	6 N (1.3 Lbs.) Push
Axial	25 N (5.6 Lbs.) Pull
Radial	18 N (4 Lbs.) At end of shaft

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