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When selecting IKO bearing, it is necessary to select whether the bearing meets our mechanical application range according to the size, specification and speed of IKO bearing.
1. IKO bearing size limit
Generally, the space where IKO bearings can be installed is limited. In most cases, the shaft diameter (or IKO bearing inner diameter) is limited by mechanical design or other design. Therefore, the type and size of IKO bearing are determined according to the inner diameter of the bearing. Therefore, the main dimension tables of standard IKO bearings are prepared according to the international standard inner diameter dimensions.
Standard IKO bearings have various sizes and forms, and standard bearings are used in mechanical device design (this is designed to make IKO bearings easy to purchase. Here’s a digression.
Some of the bearings catalog models do have some, but some non-standard IKO bearings are not available in Chinese mainland, and sometimes futures will be very long time, so when bearing selection, we should consider the cost of time and late replacement). The nature, size and direction of bearing load and load applied on IKO bearing are variable. Generally, the rated basic load is shown in the size table. However, axial load and radial load are also important factors for selecting appropriate IKO bearing. When the sizes of ball and needle roller bearings are the same, needle roller bearings usually have high load capacity and bear large vibration and impact Impact load.
The allowable speed is determined according to the type, size, accuracy, cage type, load, lubrication mode, cooling mode and other factors of IKO bearing. The allowable speed of IKO bearings with standard accuracy under oil lubrication and grease lubrication is listed in the bearing table. Generally, deep groove ball bearings, self-aligning ball bearings and cylindrical roller bearings are suitable for high-speed operation.
The dimensional accuracy and rotation accuracy of IKO bearing are based on ISO and JIS standards. For machines requiring high precision and high-speed operation, it is recommended to use bearings with precision of grade 5 or above. Deep groove ball bearings, centripetal thrust ball bearings or cylindrical roller bearings are suitable for machines with high operation precision. Rigidity, when the contact surface of the rolling element and raceway of the bearing is compressed, it will produce elastic deformation. Some machines need to minimize elastic deformation. Roller bearings produce less elastic deformation than ball bearings.
The stamped cage is written into the bearing code only if it is not used as a standard structure. The solid cage is made of metal, phenolic resin fabric and plastic. These materials are generally indicated in the bearing code. Metal solid cages are used in working places with high strength requirements and high temperature. Solid cages can also be used when retaining edges are required. The high-speed bearing cage at the retaining edge is made of light materials, such as light metal or phenolic resin fabric, to ensure its small inertial force. Polyamide (nylon 66) cage has very good sliding and self-lubricating properties. The cage made of glass fiber reinforced nylon 66 is used for stable operation with working temperature not exceeding 120 ~ C. When using lubricating oil, additives in the oil may affect the service life of this cage.