Usongshine 5pcs Nema17 Stepper Motor 48MM 42BYGH 1.7A 17HS8401 4-Lead for 3D Printer CNC Review (2026)

Who a 5 motor pack makes sense for

Buying five matched motors at once suits someone building a printer from a bare frame, converting a machine to run a CNC spindle, or replacing an entire aging motion system rather than a single failed motor. Having identical motors across X, Y, Z and extruder axes simplifies both wiring and troubleshooting, since torque and current characteristics are consistent throughout the machine. The 48mm body length carries more mass than shorter NEMA 17 motors, which is an advantage on stationary or lightly moving axes like a printer's dual Z screws, but a disadvantage on a fast moving X or Y axis where added toolhead weight increases ringing and can cap top print speed. Anyone replacing just one motor on an otherwise working printer will likely find four spares sitting unused.

What the extra body length and current buy you

At 48mm, these motors are longer than the common 38mm NEMA 17 size, and body length is the main lever manufacturers use to increase torque within the same NEMA 17 faceplate footprint, since a longer rotor stack allows for a stronger magnetic design. The 1.7A rating and 4 lead bipolar wiring are standard for this class of motor and work with common stepper drivers found on most 3D printer and CNC controller boards. Extra torque headroom is most useful on a Z axis lifting a heavy gantry or bed, or on a CNC conversion cutting through material, where the printer's usual light duty X and Y motors would be undersized. The step angle and NEMA 17 mounting footprint remain standard, so physical and electrical compatibility with typical printer mainboards is not a concern.

Wiring five motors into a build

Because these ship as bare motors with 4 lead wires rather than a keyed connector, wiring them into a printer or CNC controller means either crimping matching connectors or splicing onto existing motor cables, which is more involved than a plug and play cable included motor but standard practice for a from scratch build. The 1.7A current rating means drivers should be set appropriately and, especially on a longer print or cutting job, given adequate cooling, since running near the motor's rated current for extended periods generates more heat than the lighter 1.5A motors in Usongshine's shorter lineup. Mounting five identical motors also simplifies spare parts, since a failure on any axis can be swapped from the same batch without hunting for a matching replacement.

Comparing with the 38mm single motor and other options

Against the related 38mm 1.5A single motor in this same lineup, these 48mm units trade lighter weight for more available torque, a fair trade on stationary axes but not necessarily on a printer's toolhead, where the lighter motor generally performs better at speed. For a printer built from scratch or a CNC conversion needing torque across multiple axes, buying five matched 48mm motors in one order beats sourcing single motors individually at inconsistent specs. Owners upgrading just one motor on an otherwise stock printer should match the body length and current already used elsewhere in the machine rather than introducing a heavier or higher current motor on a single axis.

Bottom line and when the shorter motor is the better pick

For a full printer build, a CNC conversion, or replacing an entire motion system where consistent torque across axes matters, this 5 pack of 48mm motors is a solid, cost effective way to buy in bulk. Choose the shorter 38mm single motor instead if you are replacing just one X, Y or extruder motor on a machine that already uses lighter motors elsewhere, since matching your printer's existing specs avoids uneven performance between axes. Either way, confirm your driver and cooling setup can handle the motor's rated current before running it at full load for long print jobs.

Frequently asked questions