LDO-42STH40-1684CL350E(VRN) NEMA17 Linear Stepper Motor for Voron Trident Z Axis

The LDO-42STH40-1684CL350E(VRN) is a 1.8° NEMA17 linear stepper motor designed for precise vertical motion in high-performance 3D printers. It combines a 40mm motor body, integrated Tr8x4 lead screw, and black PEEK nut for stable Z-axis movement.

This motor is a strong fit for Voron Trident-style Z motion systems, especially builds that require compact motor packaging, reliable holding torque, and a ready-to-wire connector setup.

Key Features

Integrated Tr8x4 Linear Drive

Built with a Tr8x4(P2x2) lead screw, this motor converts rotary motion directly into smooth linear Z-axis movement. Ideal for printer platforms that require consistent layer height and stable bed positioning.

40mm NEMA17 Body with 450mN·m Holding Torque

The 40mm body provides a good balance of compact size and torque output. With 450mN·m minimum holding torque, it is suitable for vertical lifting applications in enclosed or rigid-frame 3D printers.

Black PEEK Nut Included

The RevD drawing specifies a black PEEK nut, designed for heat resistance and clean mechanical operation. The nut drawing includes Ø22 outer diameter, Ø16 inner feature, Ø10 center bore, and 4 × Ø3.2 mounting holes.

Predefined Wiring and Connector Layout

The motor uses a clear 4-wire color reference with A/C and B/D coil pairs, plus a 700±20mm UL1007 AWG24 cable harness. This helps reduce wiring mistakes during printer assembly or motor replacement.

Recommended for:

Voron Trident-style Z-axis motion systems

Voron 300 / Cube-style builds using Tr8x4 Z lead screws

DIY CoreXY 3D printers requiring integrated NEMA17 lead screw motors

Z-axis bed lifting systems

Printer upgrades where a compact 40mm NEMA17 linear stepper is required

Before ordering, confirm your printer requires:

NEMA17 42mm frame

Tr8x4 lead screw

300±1mm exposed screw length

31mm mounting hole spacing

Compatible connector or rewiring ability

Installation Notes

Verify coil pairs before connecting to the stepper driver.

Do not force the PEEK nut onto the lead screw; check alignment first.

Keep the lead screw parallel to the Z-axis rail or guide system.

Confirm the 31mm NEMA17 mounting pattern before installation.

Set stepper current according to your electronics and cooling setup; the motor is rated at 2.0A/phase.

1 × LDO-42STH40-1684CL350E(VRN) NEMA17 Linear Stepper Motor

1 × Integrated Tr8x4 Lead Screw

1 × Black PEEK Nut

1 × Cable Harness