4pcs U Groove Pulley 0840UU Groove Wheel U Type U Pulley Roller Guide Wheel 8x40x20.7mm (4pcs 8x40x20.7mm)

General Description This grooved pulley is ideal for use in doors and windows, tracking and driving mechanical equipment. Each set includes four pulleys, perfect for various DIY projects. Technical specifications Model: 0840UU Type: U-shaped groove Material: metal and plastic Color: black Inner diameter: 8 mm Outer diameter: 40 mm Thickness: 20.7 mm Quantity: 4 pieces Weight: approximately 109 g Compatibility and accessories This pulley is compatible with various door and window systems equipped with U-shaped tracks. It can be used in conjunction with bearings and other guide accessories. Installation To install the pulley, follow these steps: Remove the old pulley if necessary. Insert the new pulley into the U-track. Make sure the pulley is properly aligned. Test the movement to verify smooth operation.Use This pulley is used to facilitate the movement of doors and windows, providing an effective solution for sliding systems. Thanks to its design, it allows quiet and smooth operation.