Cymotorix builds 2 phase hybrid stepper motors across the full NEMA 8 to NEMA 42 range, in both 1.8° and 0.9° step angles. Holding torque runs from 0.01 N·m on the smallest 20mm frame up to about 4 N·m on the 110mm frame. Every motor holds step angle accuracy within ±5%, insulation resistance of 100MΩ minimum at 500VDC, and an 80°C maximum temperature rise. We wind, assemble, and test in our own Changzhou plant, and customize shaft, winding, connector, and lead wire to your drawing. The pages below break each NEMA size into its own spec sheet so you can match frame, torque, and wiring to your load.
Full NEMA 8 to NEMA 42 range in 1.8° and 0.9° step angles, holding torque from 0.01 N·m up to 28 N·m, all built and tested in our own Changzhou plant.
Shaft, winding, lead length, connector, and brand logo modified to your drawing. Over 70% of our 2-phase orders ship with at least one custom change.
4-wire, 6-wire, and 8-wire bipolar configurations, plus closed-loop versions with built-in encoders when an application can't tolerate lost steps.
Standard samples ship in 3–5 days. Custom prototypes in 10–15 working days. Engineering replies on selection questions within 24 hours.
We build three main types of stepper motors — 2-phase, 3-phase, and closed loop. The 2-phase hybrid is our highest-volume product, covering NEMA 8 through NEMA 42. If your application needs lower vibration at higher speeds, go with 3-phase. If you need position feedback and anti-lost-step protection, the closed loop series is the right fit.
| 2 Phase | 3 Phase | Closed Loop | |
|---|---|---|---|
| STEP ANGLE | 1.8° / 0.9° | 1.2° | 1.8° |
| FRAME SIZE | NEMA 8–42 | NEMA 23–51 | NEMA 23–42 |
| HOLDING TORQUE | 0.01–28 N·m | 0.6–25 N·m | 0.3–12 N·m |
| LEADS | 4 / 6 / 8 wire | 3 wire | 4 wire + encoder |
| BEST FOR | General positioning | Low vibration, high speed | Anti-lost-step, high reliability |
· 1.8° (200 steps/rev) and 0.9° (400 steps/rev) step angles
· Holding torque from 0.01 N·m to roughly 28 N·m across the range
· 4-wire, 6-wire, and 8-wire bipolar lead options
· CE and RoHS certified, 80°C max temperature rise
· Mechanical: shaft diameter and length, flange, mounting holes, lead exit direction
· Electrical: winding voltage and current, insulation class, connector type
· Integration: encoder, gearbox, or brake mounted and tested as one unit
· Branding: your logo on the motor body, custom labels and packaging
· D-cut flat shaft
· Keyed shaft, single or double keyway
· Gear shaft (spur or helical)
· Hollow shaft for through-wire or through-tube routing
· Custom diameter and length to your drawing
· Stator: laminated silicon steel core, precision-wound copper
· Rotor: permanent magnet plus toothed iron caps
· Bearings: ball bearings rated past 20,000 hours
· Housing: anodized aluminum or painted steel end caps
Stepper motor and servo motor manufacturer in Changzhou, China since 2004. We run 5 production lines with annual output over 1,000,000 motors, serving OEM customers in 30+ countries.
About Us facility Solutions CertificationsA 2 phase stepper motor has two windings, an A phase and a B phase, set 90 electrical degrees apart. The driver feeds current to the two phases in sequence, and the rotor turns one fixed step per pulse. With a 1.8° step angle that's 200 steps per full turn; a 0.9° version doubles that to 400. Because position tracks the pulse count, a basic system needs no feedback sensor, which keeps the motor simple and inexpensive. It's the most widely used stepper type in industrial motion control.
We cover NEMA 8 (20mm), NEMA 11 (28mm), NEMA 14 (35mm), NEMA 17 (42mm), NEMA 23 (57mm), NEMA 24 (60mm), NEMA 34 (86mm), and NEMA 42 (110mm). Standard step angle is 1.8°, with 0.9° available on the common frames. Each NEMA size links to its own page with the full model-by-model spec table, so you can match frame and torque to your load directly.
A 4-wire 2 phase stepper motor is bipolar — two coils, no center taps, and the driver reverses current through each coil to step. A 6-wire motor adds a center tap on each coil, so it can run unipolar or bipolar series. An 8-wire motor splits each phase into two coils and gives you the most options: unipolar, bipolar series for torque at low speed, or bipolar parallel for higher top speed at higher current. We supply 4-, 6-, and 8-wire builds depending on your driver and speed target.
The main differences are step angle and smoothness. A 2 phase motor steps at 1.8° (200 steps/rev) and is the standard choice for general positioning. A 3 phase motor steps at 1.2°, runs with lower vibration, and holds torque better at higher speed, which suits faster or noise-sensitive jobs. The 2 phase line carries a wider frame range (NEMA 8–42) and pairs with cheaper, more common drivers. If low vibration and high-speed torque matter more than cost, look at the 3 phase stepper motor range.
Yes. Shaft diameter, length, and end type (D-cut, keyed, gear, or hollow) are all made to your drawing. On the electrical side we set winding voltage and current to match your driver, change the connector (JST, Molex, or your terminal), and adjust lead length. We can also mount an encoder, gearbox, or brake and test the assembly as one unit before it ships.
Standard models ship as samples in 3–5 days. Custom prototypes take 10–15 working days once the drawing is confirmed. For a selection question, send your torque, speed, frame, and voltage limits and our engineers usually reply within 24 hours.
A working reference for engineers and procurement teams specifying 2 phase stepper motors for OEM equipment. It covers how the motor works, the wiring options, the difference from 3 phase, and the numbers that actually drive a selection decision.
A 2 phase stepper motor turns a full rotation into a fixed number of equal steps. Each driver pulse advances the rotor by one step — 1.8° on a 200-step motor, 0.9° on a 400-step motor. The stator carries two windings, phase A and phase B, offset by 90 electrical degrees. The driver energizes them in sequence, and the rotating magnetic field pulls the toothed hybrid rotor along one increment at a time. Since each pulse equals a known angle, the controller tracks position by counting pulses, with no encoder needed. That open-loop simplicity is the main reason 2 phase steppers stay the default for accurate, low-cost positioning.
The lead count decides how you can drive the motor and what speed-torque curve you get.
A practical rule: connect current 10–20% below the rated phase current to limit heat, and never unplug a motor while the driver is powered — the back-EMF spike can kill the driver IC.
Both are hybrid steppers; the split comes down to step angle, smoothness, and cost.
| 2 Phase | 3 Phase | |
|---|---|---|
| Step angle | 1.8° / 0.9° | 1.2° |
| Vibration | Moderate | Lower |
| High-speed torque | Good | Better |
| Driver cost | Lower, widely available | Higher |
| Frame range | NEMA 8–42 | NEMA 23–51 |
For most positioning jobs the 2 phase motor is the right call on cost and driver availability. Move to 3 phase when vibration or high-speed torque is the deciding factor.
Four numbers settle most selections:
If lost steps are unacceptable — high-value parts, unattended runs — step up to a closed loop stepper motor with encoder feedback. Send us the load and we'll confirm the frame and torque before you commit.
Across the NEMA range these motors drive 3D printers, CNC routers and engravers, laser cutters, security camera pan-tilt heads, office equipment, medical pumps and analyzers, and industrial valve and knob control. Smaller frames (NEMA 8–17) handle light, compact loads; larger frames (NEMA 23–42) take on the higher-torque axes in machine tools and automation lines.
