310mm Tr8x8 Lead Screw Nema 17 Integrated Linear Actuator Stepper Motor with External Brass Nut 1.5A 59oz-in for RepRap Prusa i3 3D Printers Z Axis CNC

310mm TR8x8 Lead Screw NEMA 17 External Linear Actuator for Prusa i3 3D Printers - 1.5A, 59.49 oz-in Holding Torque, Brass Nut, 4-Wire Cable, Pack of 1
✔️ Pack: 1 unit; Includes 39.37" motor wire; RoHS & CE certified; Ready for quick plug-and-play upgrades

This integrated NEMA 17 external linear actuator combines a 310 mm lead screw with a brass nut to deliver precise translational motion for Z-axis upgrades on Prusa i3 style printers, CNCs, and compact automation setups. It’s handy for tight build spaces and straightforward retrofits.

✅ Lead screw length: 12.21" (310 mm); diameter 0.32" (8 mm); lead per step 0.00157" (0.04 mm); lead per revolution 0.315" (8 mm)
✅ Frame size: 1.65" × 1.65" (42 × 42 mm); body length 1.57" (40 mm)
✅ Holding torque: 59.49 oz-in (42 N·cm)
✅ Rated current per phase: 1.5 A; phase resistance: 1.6 Ω; inductance: 3.2 mH ±20% (1 kHz)
✅ Step angle: 1.8° (200 steps per revolution)
✅ Connection: 4-pin cable with 2.54 mm (0.1 in) connector; Red A+, Blue A-, Black B+, Green B-
✅ Nut style: Brass; Nut material: Brass; Free running
✅ Weight: 13.76 oz (390 g)
✅ Packing list: 1 x NEMA 17 motor with 310 mm lead screw; 1 x 39.37" motor wire; 1 x Brass nut
✅ Applications: Prusa i3 style printers, CNC milling, small robotics, laser engraving, textile machinery, automation equipment

💡 Q&A

How does a 310 mm TR8x8 external linear actuator with a brass nut affect Z-axis precision, backlash, and heat management in a compact Prusa i3 upgrade, and what setup tips ensure accurate alignment in both inches (12.21" length, 0.315" lead) and millimeters (310 mm length, 8 mm diameter)?

• This setup delivers direct translational motion with fixed backlash characteristics thanks to the brass nut, handy for reliable Z-axis control.
• To align, ensure the lead screw is coaxial with the Z-axis guide within ±0.02 mm (±0.001 in); for these dimensions that means maintaining 12.21" (310 mm) length and 0.315" (8 mm) diameter true to spec.
• Mount on a rigid frame with flat seating to minimize tilt and deflection; use shims if needed to keep the nut square to the screw.
• Configure your driver for 1.5 A per phase and 200 steps per revolution with 0.315" (8 mm) per rev to achieve consistent, repeatable motion.
• Route cables neatly away from moving parts and heat sources; ensure Red A+, Blue A-, Black B+, Green B- are firmly connected via the 2.54 mm connector.