Gauges

Conventional measuring methods and instruments are not always suitable for checking tapered seats or measuring the internal or external roller-envelope diameter of a cylindrical roller bearing in precision applications. SKF has therefore developed a range of gauges specifically designed for the accurate measurements required when mounting cylindrical roller bearings with a tapered bore. These gauges are also useful for other precision applications.
 
GRA 30 series ring gauges and DMB taper gauges can be used to check the most common tapered seats. A GRA ring gauge can only be used to check the tapered seat for a specific bearing size. DMB taper gauges, however, can be used for different diameters as well as for tapers other than 1:12.
 
To accurately adjust radial internal clearance or preload when mounting a cylindrical roller bearing with a tapered bore, the internal or external roller-envelope diameter must be measured accurately. SKF internal clearance gauges in the GB 30 and GB 10 series, as well as the GB 49 series, enable simple and accurate measurement.