L400mm 8mm Lead Screw and Nut

This T8 Trapezoidal Lead Screw and Brass Nut Set is the industry-standard solution for converting rotational motion into precise, smooth linear motion in 3D printers, CNC machines, laser engravers, and custom linear motion systems . Lead screws are widely preferred over threaded rods (such as M8) because they offer smoother motion, faster travel, higher accuracy, and longer service life — qualities that are essential for high-quality 3D printing and CNC work. The lead screw itself is manufactured from high-grade stainless steel , machined with a trapezoidal thread profile (Tr8) for optimal load capacity and motion smoothness. With an 8 mm outer diameter , 8 mm lead , and 400 mm length , this set offers 8 mm of linear travel per single rotation of the screw — significantly faster than a standard M8 threaded rod, which only advances 1.25 mm per rotation. This makes it ideal for applications where rapid Z-axis movement or fast linear positioning is required. The included brass nut is precision-machined to fit the trapezoidal thread profile of the screw, providing low backlash, low friction, and quiet operation . The flanged design features three mounting holes that allow direct attachment to printer carriages, CNC gantries, or custom linear stages. The screw is fully compatible with standard 8 mm flexible couplers (such as 5×8 mm or 8×8 mm couplers) used to connect it to NEMA 17 stepper motor shafts — the same motors used in virtually every popular 3D printer. The smooth, accurate motion of the T8 lead screw makes it a popular upgrade choice for printers that originally shipped with M5 or M8 threaded rod Z-axes, such as earlier RepRap, Mendel, and Anet A8 designs. Whether you're building a new 3D printer, upgrading an existing machine, designing a CNC router, or constructing a custom linear actuator, this T8 lead screw set delivers the precision, speed, and reliability required for accurate motion control. Specifications Type: T8 Trapezoidal Lead Screw with Brass Nut Lead Screw Material: Stainless Steel Lead Screw Diameter: 8 mm Lead (Travel per Revolution): 8 mm Lead Screw Length: 400 mm Thread Profile: Trapezoidal (Tr8 × 8) Starts: 4-start thread (typical for 8 mm lead) Pitch: 2 mm Nut Material: Brass Nut Type: Flanged with 3 mounting holes (standard pattern) Compatible Couplers: 5 × 8 mm or 8 × 8 mm flexible shaft couplers Compatible Motors: NEMA 17 stepper motors (5 mm shaft, with coupler) Compatible Bearings: KP08, KFL08, F8-16M thrust bearings, 608ZZ (with adapter) Applications 3D Printer Z-Axis — Prusa i3, Ender 3, CR-10, Anet A8, Tronxy, and RepRap builds 3D Printer Upgrades — replacing M5 or M8 threaded rod Z-axes CNC Routers and Mills — small to medium DIY machines Laser Cutters and Engravers Linear Actuators — custom-built motion stages Pick-and-Place Machines Camera Sliders and Motion Rigs for photography and filmmaking Telescope Focusers and Astronomy Mounts Lab Equipment — precision positioning stages DIY Automation and Robotics Projects Educational Mechatronics and STEM Kits Custom Workshop Tooling and small machinery