There are four series of HGT bearing that can use for Spindle application: 618 series, 619 series, 718 series, and 719 series. The inner diameter range of those bearings is from 100mm to 950mm, and the accuracy class isdivided into P6, P5, P4, and P2. We can combine the ceramic balls with stainless steel to make the 618 series, 619 series, 718 series, and 719 series for a specific application. If you need a particular design or use bearings under low temperatures, please directly contact us for further assistance.