SG15 Deep Groove Ball Bearings 4-Pack - 5x17x8mm Chrome Steel For 6mm Rails

About This Product

DIYers and makers, these SG15 ball bearings are seriously quality components for all kinds of projects! The dimensions are precise - 5mm inner diameter, 17mm outer diameter, and 8mm width - perfect for 6mm rails in 3D printers, CNC machines, and various industrial applications. Made from GCr15 chrome steel, these bearings are built to handle heavy loads and high speeds without failing. The double rubber seals are awesome - they keep the factory lubricant in while keeping dust, debris, and moisture out. We've used these in several 3D printer upgrades and the difference in smoothness and noise reduction is noticeable immediately. The ABEC-1 precision rating means consistent performance, and the low noise operation is a huge plus for home workshops. The lithium grease works in temperatures from -30°C to +110°C, so they're versatile for different environments. The stamping steel cage ensures the balls stay properly spaced and aligned under stress. We love that you get four bearings in the pack - perfect for projects requiring multiple bearings or keeping spares on hand. They're suitable for everything from furniture hardware and sliding doors to precision machinery and automation equipment. The quality is noticeably better than some cheaper bearings we've tried - no rough spots or grinding noises during rotation. Whether you're building a new 3D printer, upgrading existing equipment, or working on various mechanical projects, these SG15 bearings deliver reliable, smooth performance that makes a real difference in your final results. Definitely professional-grade components at a very reasonable price point.