Vcore 3/4 Z1 preloaded rails kit

All orders of that kit in destination to the USA are DDP, meaning no custom fee at arrival!! For other country depending local rules, some custom fees can apply   This kit allows you to swap the stock Ratrig chinese Z0 XY rails with quality Black Z1 preloaded rail This kit mirror the HIWIN version of this kit on the store, with a more attractive price compared to Hiwin. Quality is top, tested at BRS since years, and offer a better price/value for smaller budget. Context: Linear guide preload eliminates the clearance between thecarriage and the rail. Manufacturers achieve this by using specific sized ball bearings. By eliminating the clearance, it increases rigidity and reduces deflection when external loads are applied. In a 3D printer, rails preload is a key factor to increase precision and improve the input shaper specs since no preload are cheaper, but get some play, more sensible to vibration across our high accelearions values.. The ball bearings used to achieve preload are slight