ELEGOO 42-34 Stepper Motor for Neptune 4 and 4 Pro

The short version of ELEGOO's factory stepper: same NEMA17 frame, but a 34 mm body instead of 40. It fits the Neptune 4 and Neptune 4 Pro. You buy one when an axis stops holding steps — prints walk along X or Y, the motor jitters and whines instead of running smooth, and its case gets noticeably hotter than its neighbour. The shaft is bare, so pull the pulley off the old motor and move it over.

Specifications

• NEMA17 frame, 42 × 42 × 34 mm body
• 1.8° step, 24 V from the mainboard
• JST-XH connector, stock-length lead
• Genuine ELEGOO replacement part

Compatibility: ELEGOO Neptune 4 and Neptune 4 Pro. The Neptune 4 Plus and 4 Max ship with the longer 42-40 and this one won't fit them, even though machine-translated listing titles muddle the models and throw in "Neptune 4 Max". Put a ruler on your motor's body before you order.