Stepper Motor: Bipolar, 200 Steps/Rev, 20×30mm, 3.9V, 0.6 A/Phase

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SKU: POLOLU-1204 Brand: Pololu
This small NEMA 8-size hybrid bipolar stepping motor has a 1.8° step angle (200 steps/revolution). Each phase draws 600 mA at 3.9 V, allowing for a holding torque of 180 g-cm (2.5 oz-in). With a weight of 60 g, this is one of the smallest stepper motors Pololu carry.
$48.60 AUD, inc GST
$44.18 AUD, exc GST

Available with a lead time
Expect dispatch between Dec 11 and Dec 16

Quantity Discounts:

  • 10-25 $42.85 (exc GST)
  • 25+ $41.97 (exc GST)
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0 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

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Shipping:

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  • $11+ Express (2+ days*, tracked)
  • FREE Pickup (Newcastle only - must order online*)

Shipping costs may increase for heavy products or large orders.

Exact shipping can be calculated on the view cart page.

*Conditions apply, see shipping tab below.

Bipolar stepper motor wires are terminated with bare leads.

Bipolar stepper motor wiring diagram.

This small hybrid bipolar stepping motor has a 1.8° step angle (200 steps/revolution). Each phase draws 600 mA at 3.9 V, allowing for a holding torque of 180 g-cm (2.5 oz-in). The motor has four color-coded wires terminated with bare leads: black and green connect to one coil; red and blue connect to the other. These leads connect to the stepper motor through a removable JST-ZHR-5 connector. The motor can be controlled by a pair of suitable H-bridges (one for each coil), but Pololu recommend using a bipolar stepper motor driver or one of Pololu's Tic Stepper Motor Controllers. In particular, the Tics make control easy because they support six different interfaces (USB, TTL serial, I²C, RC, analog voltages, and quadrature encoder) and are configurable over USB with Pololu's free configuration utility.

Pololu's 4 mm universal mounting hub can be used to mount objects on the stepper motor’s 4 mm-diameter output shaft. For a slightly more powerful motor in the same NEMA size but a longer length, consider Stepper Motor: Bipolar, 200 Steps/Rev, 20×42mm, 4.3V, 0.8 A/Phase. A comparison between these two motors can be seen in the image below.

SY20STH30-0604A (top) and SY20STH42-0804A (bottom).

Specifications

  • Size: 20 mm square × 30 mm, not including the shaft (NEMA 8)
  • Weight: 60 g (2 oz)
  • Shaft diameter: 4 mm “D”
  • Steps per revolution: 200
  • Current rating: 600 mA per coil
  • Voltage rating: 3.9 V
  • Resistance: 6.5 O per coil
  • Holding torque: 180 g-cm (2.5 oz-in)
  • Inductance: 1.7 mH per coil
  • Lead length: 30 cm (12")
  • Output shaft supported by two ball bearings

More specifications are available in the datasheet (51k pdf).

Dimensions

The following diagram shows the stepper motor dimensions in mm. The dimension labeled “Length” is 30 mm. The output D-shaft has a length of 15 mm and a 4 mm diameter with a section that is flattened by 0.5 mm. This shaft works with Pololu's 4 mm universal mounting hub.

The inside of a bipolar stepper motor (SOYO NEMA 14-size).

Stepper Motor Applications

Stepper motors are generally used in a variety of applications where precise position control is desirable and the cost or complexity of a feedback control system is unwarranted. Here are a few applications where stepper motors are often found:

  • Printers
  • CNC machines
  • 3D printer/prototyping machines
  • Laser cutters
  • Pick and place machines
  • Linear actuators
  • Hard drives

Pololu’s assortment of stepper motors.

Note: This stepper motor is SOYO part number SY20STH30-0604A.

People often buy this product together with:

Pololu Universal Aluminum Mounting Hub for 4mm Shaft, #4-40 Holes (2-Pack)Pololu Universal Aluminum Mounting Hub for 4mm Shaft, #4-40 Holes (2-Pack)
A4988 Stepper Motor Driver CarrierA4988 Stepper Motor Driver Carrier
Stepper Motor: Bipolar, 200 Steps/Rev, 28×32mm, 3.8V, 0.67 A/PhaseStepper Motor: Bipolar, 200 Steps/Rev, 28×32mm, 3.8V, 0.67 A/Phase

Dimensions

Size: 20 mm square × 30 mm1
NEMA size: 8
Weight: 60 g
Shaft diameter: 4 mm

General specifications

Shaft type: 4 mm "D"
Current rating: 600 mA2
Voltage rating: 3.9 V
Holding torque: 2.5 oz·in
Steps per revolution: 200
Resistance: 6.5 Ohm2
Inductance per phase: 1.7 mH
Number of leads: 4
Lead length: 30 cm

Notes:

1
Not including the shaft.
2
Per coil.

File downloads

This product is listed in:

Components & Parts>Motors>Stepper Motors

Product Comments

Exact shipping can be calculated on the view cart page (no login required).

Products that weigh more than 0.5 KG may cost more than what's shown (for example, test equipment, machines, >500mL liquids, etc).

We deliver Australia-wide with these options (depends on the final destination - you can get a quote on the view cart page):

  • $3+ for Stamped Mail (typically 10+ business days, not tracked, only available on selected small items)
  • $7+ for Standard Post (typically 6+ business days, tracked)
  • $11+ for Express Post (typically 2+ business days, tracked)
  • Pickup - Free! Only available to customers who live in the Newcastle region (must order online and only pickup after we email to notify you the order is ready). Orders placed after 2PM may not be ready until the following business day.

Non-metro addresses in WA, NT, SA & TAS can take 2+ days in addition to the above information.

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If you order lots of gear, the postage amount will increase based on the weight of your order.

Our physical address (here's a PDF which includes other key business details):

Unit 18, 132 Garden Grove Parade
Adamstown
NSW, 2289
Australia

Take a look at our customer service page if you have other questions such as "do we do purchase orders" (yes!) or "are prices GST inclusive" (yes they are!). We're here to help - get in touch with us to talk shop.

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