Press Fitting Method for Cylindrical Hole NTN Bearings
When installing NTN bearings with cylindrical holes, the press fitting method is commonly used. This technique involves pressing the bearing onto the shaft or into the housing. For small NTN bearings, a simple press is often sufficient. However, care must be taken to avoid damaging the raceway surfaces during installation. It's recommended to apply lubricant on the mating surfaces before installation to ensure smooth and even pressure distribution. In some cases, a block may be placed on the inner ring when using a hammer, but this practice has led to problems in the past. Therefore, it should only be used for small clearance fits and not for large interference fits or medium-to-large NTN bearings. For deep groove ball bearings and other non-separable NTN bearings, both the inner and outer rings require an interference fit. In such cases, a press or hydraulic device is necessary to install the rings correctly. For self-aligning ball bearings, the outer ring can easily tilt, so it’s best to use a block or support during installation, even if no interference fit is required. In the case of separable bearings like cylindrical roller or tapered roller bearings, the inner and outer rings are installed separately onto the shaft and housing. When assembling them individually, it's important to ensure that both parts are aligned properly without any misalignment. If forced too tightly, this could cause damage to the raceway surfaces. Proper installation techniques are essential to ensure the longevity and performance of NTN bearings. Always follow the manufacturer's guidelines and use the appropriate tools for each type of bearing.
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