Fast & free stop-desk delivery from 4000 DA | Flexible payment | Technical support for your builds
BinaryTech DZ

Stepper Motors

21 results

Stepper motors from NEMA 11 to NEMA 34, 28BYJ-48 units and geared DC motors, for 3D printers, CNC machines, robotic arms and Arduino builds.

Related categories

Motor DriversGeared Motors and EncodersAir and Water PumpsServo Motors
21 results

21 results

12

Choosing a stepper motor

A stepper motor turns in fixed increments (most often 1.8° per step, or 200 steps per revolution), which lets you position an axis without a feedback sensor. This is what sets it apart from a standard DC motor such as the JGA25-370 geared motor, which runs continuously and is controlled by speed rather than position.

The NEMA format indicates the size of the front face, not the power. Instead, go by the torque and current per phase, which appear in the reference code:

  • 28BYJ-48: small 5 V unipolar motor supplied with its ULN2003 board, for learning, opening a shutter or turning a small cam. Low torque.
  • NEMA 11 / NEMA 16 (28SHD4303, 16PM-M304): compact mechanisms, small axes, optics.
  • NEMA 17 (42HS40-1704, 42SHDC6033Z, 42HS34-1334): the standard for 3D printers and small CNC machines. The version with an integrated lead screw serves directly as a linear Z axis.
  • NEMA 23 and NEMA 34 (57HS56-3004, 86HS118-6004): milling machines, cutting tables, heavy loads.

A bipolar motor should never be connected directly to a power supply: it needs a current-limiting driver (A4988, DRV8825, TB6600 depending on the current) set to the amperage on the motor's label. Drivers and power supplies are found in Motors and actuators.

Frequently asked questions

What is the difference between a stepper motor and a geared DC motor?

A stepper motor is controlled by a number of steps, giving precise position, and it holds its place when stopped. A geared DC motor, such as the JGA25-370, delivers torque and speed but does not know its position without an encoder.

Which stepper motor for a 3D printer?

A bipolar NEMA 17 at 1.8°, with a current per phase compatible with your driver: the 42HS40-1704 or 42SHDC6033Z references fit this use. For the Z axis, a NEMA 17 with an integrated lead screw avoids the need for a coupler.

Is the 28BYJ-48 enough for an Arduino project?

Yes, for anything light: a curtain, a small rotation, a demonstration. It runs on 5 V with a ULN2003 module, but its torque and speed remain limited compared with a NEMA 17.

Is a driver always required?

For a bipolar NEMA motor, yes: the driver limits the current in the coils and manages the step sequence. Without it, the coils overheat and the motor does not turn properly.

What makes the price of a stepper motor vary?

Mainly the NEMA size, torque in N.m, current per phase and body length. Used motors, salvaged from equipment, sit below new units of the same format.