Four Pack Dope Flexible Shaft Couplings 15 by 20mm Aluminum Alloy Motor Couplers For 3D Printer And CNC Machines Bore 3mm To Three Point Seventeen Millimeter Encoders DIY Projects Smooth Drive Linkage Easy Install
✔️ 15x20mm aluminum alloy couplers, bore 3.0-3.17mm, 4 pcs
These flexible shaft couplings are lightweight aluminum alloy joints designed to connect motors to drive shafts in 3D printers, CNC machines, and other automation setups. They help align shafts and encoders, absorb minor misalignment, and smooth drive trains in DIY projects and professional equipment.
✅ Dia x L: 15 x 20mm (0.59 x 0.79 in); bore: 3.0-3.17mm (0.118-0.125 in)
✅ Material: aluminum alloy, silver color; lightweight and corrosion resistant
✅ Pack: 4 pieces per pack; compatible with 3D printer motors, encoders, and CNC drives
✅ Helical cut design absorbs angular, parallel, and axis misalignment; reduces vibration
✅ Install notes: align shafts and tighten screws evenly to avoid damage
💡 What is a pillow block bearing used for in hobby CNC machines and 3D printers?
Pillow blocks provide support and alignment for rotating shafts in compact, user-friendly housings. Handy in small machines where vibration dampening and easy maintenance matter.
- Sealed pillow block bearing provides reliable shaft support in compact builds
- Handy for reducing shaft wobble and noise in DIY CNC and printer rigs
- Supports easy upgrades and quick replacements for motors and encoders
- Ideal for precision alignment and vibration control in small automation projects