5mm to 6mm Coupling for CNC Machines

The 5mm to 6mm shaft coupler is a key component in the motion systems of CNC machines, responsible for connecting shafts of different diameters. This product is widely used in devices such as CNC engravers, CNC routers, and EleksMill spindle motors, where high precision and stable power transmission are essential. Made from durable brass, this material not only offers suitable strength but also high resistance to wear and corrosion, significantly increasing the lifespan of both the component and the machine.

The brass fixed CNC coupler serves as a reliable solution for slip‑ and vibration‑free connections. With its precise design and standard dimensions, this type of coupler enables simultaneous torque and axial motion transfer while preventing any play between the motor shaft and the motion mechanism. This feature is especially critical in devices requiring high accuracy, as it directly determines the quality of the final output.

Installing this coupler is very straightforward and requires no specialized tools. The 5mm to 6mm shaft coupler easily fits between a 5mm and a 6mm shaft and is securely fastened using side‑adjustment screws. This reduces installation time and prevents assembly errors. Additionally, thanks to tight manufacturing tolerances, perfect compatibility between parts is achieved, further improving system performance.

The brass shaft coupler is a popular choice among professional and industrial users, not only for its precision in motion transfer but also because its suitable weight and good balance minimize unwanted vibrations. This is particularly important at high spindle rotation speeds, where it directly influences cutting and engraving quality. Furthermore, the 5‑to‑6 conversion coupler acts as an adapter, allowing the use of components with different standards and eliminating the need to replace an entire system.

This characteristic reduces maintenance and upgrade costs while increasing system flexibility. Ultimately, the CNC shaft coupler not only provides a physical connection between components but also serves as a bridge between mechanical performance and electronic precision. By using this coupler, users can expect their machines to operate with high efficiency, appropriate stability, and long‑term durability. Moreover, the integrated structure of this product and the absence of additional moving parts result in minimal need for periodic repair and maintenance, delivering stable performance even under continuous operating conditions.

5mm Shaft Coupler Application:

1. Connecting a 5mm spindle motor shaft to a 6mm tool shaft.
2. Use in CNC engraving machines requiring high precision.
3. Improving compatibility between different components of CNC router machines.
4. Reducing vibration at high shaft rotation speeds.
5. Easy installation in both amateur and professional workshops.
6. Increasing durability and reducing wear in mechanical connections.

5 to 6mm Shaft Coupler Specification:

1. Input Inner Diameter: 5 mm
2. Output Inner Diameter: 6 mm
3. Main Body Material: Brass
4. Connection Type: Rigid, with side adjustment screws
5. Overall Length: 25 mm
6. Coupler Outer Diameter: 12 mm
7. Number of Compression Screws: 2 pcs
8. Screw Type: M3 Hex Socket Screw
9. Compatibility: Compatible with smooth, round shafts (no keyway required)