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NEMA17 Stepper Motor LKD-42STH20-1004-ASH is a compact 20 mm bipolar stepper motor for compatible extruder assemblies, light-duty motion systems, machine repairs, and custom electronics projects.
$21.95
The NEMA17 stepper motor LKD-42STH20-1004-ASH is a compact bipolar motion motor for compatible extruders, light-duty motion systems, machine assemblies, and custom electronics projects. With a 20 mm body length, 1.8° step angle, 2.0A rated current per phase, and 18 N/cm holding torque, this motor is useful where a shorter NEMA17 format is required.
This NEMA17 stepper motor is designed for applications that require controlled rotational movement in a compact frame size. It can be used in compatible extruder assemblies, small positioning systems, 3D printer motion setups, feeder mechanisms, light-duty automation projects, and custom equipment builds where the electrical and mechanical specifications match the design.
The motor features a 42 × 42 mm frame size, 20 mm body length, 5 mm shaft diameter, 24 mm shaft length, and 15 mm D-cut length. The shorter body length can be useful in compact assemblies where space is limited, while the D-cut shaft helps provide a secure interface with compatible pulleys, gears, or drive components.
This bipolar stepper motor is rated at 2.0A per phase with 1.4 ohms phase resistance and 3.0mH ±20% inductance at 1KHz. Always confirm motor driver compatibility, current settings, wiring order, cooling, and firmware configuration before installation.
The current product page lists a 1 m cable with JST-XH 4-pin male connector included. The listed wire colours are A+ black, A- green, B+ red, and B- blue. Confirm pinout and coil pairs before connecting to a stepper driver or control board.
Browse more stepper motors, electronics parts, and 3D printer parts for compatible motion systems, repairs, and custom build projects.
For general background on how stepper motors work, see this overview of stepper motors and their control.
Each NEMA17 stepper motor is sold individually and includes the listed 1 m JST-XH 4-pin cable.
| Product Type | Bipolar stepper motor |
|---|---|
| Model / Part Number | LKD-42STH20-1004-ASH |
| Frame Size | NEMA17 / 42 × 42 mm |
| Body Length | 20 mm |
| Step Angle | 1.8° |
| Holding Torque | 18 N/cm |
| Rated Current / Phase | 2.0A |
| Phase Resistance | 1.4 ohms |
| Inductance | 3.0mH ±20% at 1KHz |
| Shaft Diameter | 5 mm |
| Shaft Length | 24 mm |
| D-Cut Length | 15 mm |
| Number of Leads | 4 |
| Connector | JST-XH 4-pin male connector |
| Included Cable | 1 m cable with JST-XH 4-pin male connector |
| Connection Colours | A+ Black, A- Green, B+ Red, B- Blue |
| Weight | 127 g |
| Common Applications | Compatible extruder assemblies, compact motion systems, 3D printer motion setups, feeder mechanisms, light-duty automation, repairs, and custom electronics projects |
| Quantity | Sold individually |
| SKU | DB-0664-7438 |
Verification note: Manufacturer name, datasheet source, connector pinout compatibility, motor wire order, insulation class, operating temperature, and exact replacement equivalency should be verified before adding additional claims.
At dnb3D, we don’t just ship boxes—we manufacture solutions. Operating our Industry 4.0 micro-factory in Marathon, Ontario, means your order is handled by the same people who design and test these components.
Ready to Ship (3D Printer Parts & Hardware): Finished, inspected, and on the shelf. Dispatched within 1 to 2 business days.
In-House Manufacturing (Laser, Plasma, 3D Prints): These items are manufactured “fresh” to order. Please allow 3 to 5 business days for precision cutting and finishing.
Custom Projects: Bespoke designs require a consultation and a locked-in timeline before production begins.
We ship nationwide across Canada and the USA. Centrally located on the North Shore of Lake Superior, we are uniquely positioned to get your products moving quickly to either coast.
We stand behind every weld, cut, and print. If a product doesn’t meet your expectations, contact the Hub within 30 days. If we wouldn’t put it in our own shop, we won’t let it sit in yours.
Standard Items: Contact us within 30 days for return authorization. Items must be in original, unused condition.
Custom/Personalized Orders: Digitally fabricated to your exact specs (names, custom dimensions, or unique finishes) are final sale once production begins.
Shipping Costs: Return shipping is the responsibility of the customer unless the item arrived damaged or defective.
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