LDO-42STH48-2804AH(S55) 55mm Long-Shaft NEMA 17 Motor

The LDO-42STH48-2804AH(S55) is a Super Power HT NEMA 17 stepper motor designed for double-shear CoreXY motion systems and other high-load belt-driven applications. Its 48 mm body delivers 420 mN·m of holding torque at a rated current of 2.8 A per phase.

The extended 55 mm output shaft provides additional reach for supported-shaft motor mounts, while Class H 180°C insulation and 200°C-rated Teflon leads support use in enclosed printers. An integrated 1000 ±20 mm cable with an XH-2.54 connector is included.

Key Features

55 mm Extended Shaft

The 55 ±0.5 mm output shaft is designed for motor mounts requiring additional shaft reach. Its outer round section can be supported by a compatible bearing in double-shear installations.

420 mN·m Holding Torque

The 48 mm motor body produces 4.2 kgf·cm of holding torque for demanding CoreXY X/Y axes, large-format printers and high-load belt drives.

Class H High-Temperature Construction

Class H 180°C insulation and UL1332 AWG24 Teflon leads rated to 200°C provide additional thermal durability for enclosed printer builds.

Integrated 1 m Cable

The integrated 1000 ±20 mm four-wire cable is terminated with an XH-2.54 connector for connection to a compatible stepper driver or controller harness.

Suitable for:

• Double-shear CoreXY motor mounts
• Voron, VZBot and DoomCube-style custom builds with compatible mounts
• Large-format or high-load X/Y motion systems
• Enclosed 3D printers requiring high-temperature motor wiring
• CNC, robotics and custom belt-driven equipment

Confirm before ordering:

• NEMA 17 mounting compatibility
• Clearance for the 48 mm motor body
• Clearance for the 55 ±0.5 mm output shaft
• Compatibility with the 5 mm shaft and 30 ±0.5 mm D-flat section
• Bearing position and diameter for double-shear support
• Stepper driver current capacity and XH-2.54 connection

Installation Notes

• Verify the 55 mm shaft clearance and bearing position before installation.
• Use a pulley or coupler designed for a 5 mm D-cut shaft.
• Avoid side-loading or misaligning the shaft-support bearing.
• Confirm both coil pairs before connecting the driver.
• Set the motor current according to the driver’s RMS or peak-current convention.

1 × LDO-42STH48-2804AH(S55) High-Temperature NEMA 17 Stepper Motor