LDO-42STH40-1684CL300E(VRN) NEMA17 Linear Stepper Motor with 300mm Tr8x4

The LDO-42STH40-1684CL300E(VRN) is a NEMA17 linear stepper motor with an integrated 300mm Tr8x4 leadscrew and PEEK nut, designed for precise Z-axis motion in 3D printers and motion control systems.

With a 40mm motor body, 450mN·m holding torque, 2.0A rated phase current, and pre-wired JST-XH connector, this motor offers a clean, drop-in linear motion solution — no need to source or assemble a separate coupler, shaft, and lead screw assembly.

Key Features

Integrated 300mm Tr8x4 Leadscrew

The motor comes with a factory-integrated Tr8x4(P2x2) leadscrew, giving precise linear movement with a 0.02mm step length - ideal for Z-axis setups where repeatable vertical motion is critical.

Compact 40mm NEMA17 Body

With a 42.3mm frame size and a maximum body length of 40mm, this motor fits easily into compact 3D printer designs while still providing ample holding torque for lifting beds or gantries.

PEEK Nut for High-Temperature Printer Builds

The included black PEEK nut offers better heat resistance than standard plastic nuts, making this motor suitable for enclosed Voron-style printers and builds that require higher chamber temperatures.

Pre-Wired JST-XH Connector

The motor is wired with UL1007 AWG24 cables approximately 700mm long, twisted together and terminated with a JST XHP-4 or equivalent connector for easier installation and cleaner cable routing.

Recommended for:

Voron Trident Z-axis motor replacement or build use

Voron-style 3D printers using NEMA17 integrated leadscrew motors

Z-axis bed lifting or gantry lifting applications

DIY CoreXY printer builds requiring Tr8x4 linear motion

Motion systems that require compact NEMA17 size, integrated screw drive, and 4-wire stepper control

Before purchasing, confirm your printer requires:

300mm leadscrew length

Tr8x4 lead screw

NEMA17 42mm frame

4-pin JST-XH style motor wiring

Matching motor current setup on your stepper driver

Set motor current according to your controller and driver configuration; the drawing rating is 2.0A/phase.

Do not force the PEEK nut onto the leadscrew at an angle; keep it aligned during installation.

Check Z-axis movement direction after wiring. Reverse motor direction in firmware if needed.

Keep the leadscrew clean and avoid side loading from misaligned Z mounts.

Confirm connector pinout before plugging into third-party control boards or extension cables.

1 × LDO-42STH40-1684CL300E(VRN) NEMA17 Linear Stepper Motor

1 × Integrated 300mm Tr8x4 Leadscrew

1 × Black PEEK Nut

1 × Pre-installed 4-wire JST-XH Cable