Most of our chrome steel miniature ball bearings can be supplied open or with metal shields. The oil would potentially find its way inside the bearing making it no longer “dry”. You cannot apply the protective oil to a dry bearing. This can even happen when they are not in use or while they are in transit due to condensation forming inside the packaging. It is not suggested to use chrome steel bearings without lubrication (dry), as they are prone to rusting. To protect against moisture, miniature chrome steel bearings are coated with a preventive oil. Chrome steel is not ideal for use in corrosive environments, as it does not have corrosion resistance. At temperatures above a certain level, the strength of chrome steel bearings decreases and they experience more of a size change compared to stainless steel. They can also be used up to 150☌ intermittently. Our smallest miniature bearings can be found on the stainless steel miniature bearing page (see Products Variants).Ĭhrome steel bearings, with a steel retainer and a suitable lubricant, can be used at temperatures of 120☌ during constant use. Therefore, the cost difference is negligible due to the small amount of steel used in manufacturing. However, the smallest, most precise bearings are only made out of stainless steel. Our chrome steel miniature bearings are also available with a flange on the outer ring as shown in Products Variants below.īall bearings are usually made of chrome steel, which is a great choice because of its strength, low-noise characteristics, and affordability. They are used in applications as varied as gyros, anemometers, flow meters, miniature gearboxes, small motors and radio controlled models. Miniature bearings are sometimes referred to as instrument bearings or micro bearings. See Products Variants below for stainless steel and flanged options Chrome steel miniature bearings for shaft sizes from 1.5mm to 9mmĭimensions and technical drawings are shown in the product tables below
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