D20L25 Rigid Shaft Coupler for 3D Printer & CNC Machines

D20L25 Aluminium Rigid Shaft Coupler for Stepper & Servo Motors

Keep your 3D printer, CNC engraving machine, or CNC router running with precision-aligned shafts using this compact aluminium alloy rigid shaft coupler. Designed for exact shaft-to-shaft connection, this coupler ensures minimal runout and maximum torque transfer — ideal for CNC3018, CNC3020, and similar DIY machining setups.

Product Specifications

• Model: D20L25
• Outside Diameter (OD): 20mm
• Inside Length (L): 25mm
• Material: Aluminium Alloy
• Type: Rigid Shaft Coupler (Disc Structure)
• Compatible With: Stepper motors, servo motors, 3D printers, CNC engraving machines (CNC3018, CNC3020)
• Quantity: 1 piece per order
• Made in China

Key Features

• Precise Alignment: Rigid construction ensures zero shaft misalignment for accurate motion control.
• Lightweight & Durable: Crafted from high-quality aluminium alloy — strong, corrosion-resistant, and lightweight.
• Easy Installation: Standard set-screw design for quick and secure shaft fastening without special tools.
• Wide Compatibility: Fits a broad range of stepper and servo motor shafts used in 3D printers and CNC routing machines.
• Compact Design: Small OD20 × L25mm form factor fits into tight machine frames without obstructing adjacent components.

Perfect For

• 3D printer axis drives (X, Y, Z)
• CNC engraving & routing machines (CNC3018, CNC3020 and similar)
• DIY robotics and automation projects
• Stepper and servo motor shaft connections

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Frequently Asked Questions

Q: What shaft diameters does the D20L25 rigid shaft coupler support?

A: The D20L25 coupler has an outside diameter of 20mm and a length of 25mm. The bore size is determined by the set-screw clamp design, making it compatible with common stepper and servo motor shaft sizes used in CNC and 3D printer applications. Please confirm your motor shaft diameter before ordering.

Q: Is this coupler suitable for both CNC3018 and CNC3020 machines?

A: Yes, this rigid shaft coupler is designed to be compatible with CNC3018, CNC3020, and similar DIY CNC engraving and routing platforms, as well as most desktop 3D printers using standard stepper motors.

Q: What material is this shaft coupler made from?

A: This coupler is machined from aluminium alloy, offering an excellent balance of strength, light weight, and corrosion resistance — ideal for precision motion control applications in 3D printers and CNC machines.

Q: How many pieces are included per order?

A: Each order includes 1 piece of the D20L25 rigid shaft coupler.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.