SKFbearingcross referencechart

You can measure the dimensions of a bearing by using a vernier calliper like the one below or measuring accurately with a ruler.

ImperialBearing conversion Chart

An example of where a larger clearance is required is if a bearing is likely to get hot. The heat needs room to escape otherwise there is a risk of bearing failure.

Most bearings have their references numbers engraved on the bearings themselves, but these often rub off over time and so it may be necessary to measure the bearing yourself, as described below.

Once you have determined the dimensions of your bearing, you can use our bearing search tool to find the correct bearing.

Bearing conversioncalculator

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Additionally, bearings also have a clearance value. This provides the bearing room for expansion between the bearing races and will add a small amount of play between the two rings.