What are the standard dimensions for bearings?

[ArthurRose]

Inner diameter is 6, thickness is 5, but the outer diameters are 12 and 13 respectively. Below are detailed introductions to relevant content: Outer diameter dimensions: Miniature bearings (440mm). Angular contact ball bearings are commonly referred to as Class 6 bearings represented by 36 and 46 types, with contact angles typically being 15 degrees, 25 degrees, 45 degrees, etc. Sliding bearings: Sliding bearings do not have inner or outer rings nor rolling elements, and are usually made of wear-resistant materials. They are commonly used in mechanical rotating parts with low speed, light load, and where lubricating oil injection and maintenance are difficult. Spherical plain bearings: The sliding contact surface of spherical plain bearings is spherical, mainly suitable for oscillating motion, tilting motion, and rotational motion.