The 2040 V-Slot Black Aluminum Extrusion Profile (1 Meter) is a high-precision, dual-purpose structural framing and linear motion rail engineered for building desktop CNC machines, automated motion stages, and 3D printers. Manufactured from high-grade 6063-T5 aluminum alloy with an electrostatic black anodized finish, this 20mm x 40mm profile features specially chamfered V-groove channels that serve as rigid framing members and ultra-smooth guide tracks for V-wheel and Delrin dual-V roller carriage assemblies.

Specification

• Profile Cross-Section: 20mm x 40mm (2040 Rectangular V-Profile)
• Length: 1000mm (1 Meter / 100cm)
• Slot Type / Geometry: OpenBuilds Standard V-Slot Linear Rail Profile
• Slot Channel Width: 6mm with 45-degree chamfered V-wheel guide tracks
• Material Composition: 6063-T5 High-Tensile Structural Aluminum Alloy
• Surface Treatment: Deep Matte Black Anodized Protective Coating (Corrosion, oxidation, and wear resistant)
• Center Core Holes: Dual cylindrical core bores (Approx. 4.2mm - 4.5mm diameter, tap-ready for M5 threading)
• Linear Straightness: ≤ 0.5mm / meter
• Dimensional Tolerances: Length within ±0.5mm; profile dimensions within ±0.15mm
• Motion Component Compatibility: Fully compatible with standard OpenBuilds Solid V-Wheels, Dual V-Wheels, Delrin/Polycarbonate Rollers, Mini V-Wheels, and 20-series hardware (M3/M4/M5 T-nuts).

Features

• Integrated Linear Motion Tracks: The precision 45-degree V-grooves allow smooth-rolling V-wheels to ride directly inside the extrusion slots, eliminating the need for expensive external linear guide rails or optical rods.
• High Torsional and Bending Stiffness: The dual-column 20mm x 40mm cross-section offers double the moment resistance and structural rigidity of standard 2020 single profiles, making it ideal for heavy-load gantries and tall Z-axis columns.
• Smooth and Quiet Motion: The micro-polished V-track profiles pair with Delrin and polycarbonate V-rollers to deliver low-noise, vibration-free, and smooth linear sliding under high accelerations.
• Durable Black Anodized Finish: The hard anodized outer layer provides wear protection against repeated roller friction, resists workshop oils, and gives machines a sleek, professional matte-black finish.
• Tap-Ready Center Bores: Both end holes are sized for direct M5 tap threading, enabling rigid, clean perpendicular butt-joints using low-profile socket head cap screws.

Common Applications

• 3D Printer Gantries and Z-Axis Towers: Constructing moving X-axis crossbeams, Y-axis bed sliders, and vertical dual Z-axis pillars for Creality Ender-3, CR-10, and custom CoreXY/Voron FDM builds.
• Desktop CNC Routers & Laser Engravers: Providing structural frame support and smooth linear tracking for laser head gantries, diode engraving carriages, and light-duty spindle toolheads.
• Camera Sliders and Motorized Video Rigs: Creating ultra-smooth, silent tracking rails for motorized camera sliders and video production rigs.
• Automated Linear Actuators: Building timing-belt or lead-screw-driven automated slide units, pick-and-place arms, and modular robotics test rigs.

Professional Installation and Maintenance Tips

• Square Cuts and Clean Chamfers: If cutting the 1-meter profile down to custom lengths, use a carbide-tipped blade on a miter saw, and lightly deburr the cut edges to ensure V-wheels roll smoothly without catching at joints.
• Adjust Eccentric Spacer Tension Properly: When mounting V-wheel carriages onto the 2040 V-slot rail, turn the eccentric nut until all rollers make contact with the V-grooves without play. Avoid over-tightening, as excessive pressure creates flat spots on Delrin wheels and increases motor drag.
• Keep V-Groove Tracks Clean: Regularly wipe the 45-degree V-channels with a clean microfiber cloth and isopropyl alcohol (IPA) to remove dust, debris, and plastic strings that can cause wheel bumps and print surface artifacts.
• Use M5 Low-Profile Screws for Clearances: In linear motion paths where V-wheel carriages slide over joined brackets, use ultra-low-profile M5 screws to ensure the wheel bearings clear the screw heads without colliding.