Rigid Flange Shaft Coupler Set 2 Pack 18mm Flange, 12mm Bore, M4 Motor Shaft Coupler Connector, Built Tough, Heavy Duty Plated Steel, Easy Install, Precise Alignment For CNC Machines, Robotics And DIY Projects
These flange shaft couplers are built from electroplated iron for durability and precise alignment in CNC machines, robotics, model builds, and DIY projects. They fix one shaft to a plane and make it easy to add other components, with four 4mm mounting holes to secure everything tightly. This two-pack fits standard flange sizes and is designed for simple installation and quick replacements.
Quick specs at a glance: electroplated iron construction, 12 mm bore, 18 mm flange diameter, 4 mounting holes, and included hardware for easy setup. Ideal for CNC machines, robotic projects, and DIY rigs where precise shaft alignment and solid connections matter. Note: always confirm the product model before purchasing.
✅ Material: electroplated iron for durability✅ Inner diameter: 12 mm (0.47 in)
✅ Outer diameter: 18 mm (0.71 in)
✅ Mounting holes: 4 x 4 mm (0.16 in)
✅ Weight: ~55 g / 1.9 oz per coupler
✅ Includes: 2 couplers, 1 wrench, 4 screws
💡 What is a flange shaft coupler used for in hobby CNC and robotics?
Here's a handy explanation for common projects.
- Handy for joining motor shafts to driven shafts with solid alignment - Helps transfer torque smoothly and keeps motion accurate in small machines - Works with standard flange patterns and M4 mounting hardware - A reliable upgrade over loose connections in DIY automation