Main Bearing Size Codes
COLOR CODING OF MAIN BEARING SHELLSStandard bearing shells are Yellow-Yellow or Red-Blue.
Red shells are thinnest, yellow are 0.005 mm thicker than red, and blue are 0.005 mm thicker that yellow.
MAIN JOURNAL DIAMETER
Standard 57.981-58.000 mm
First undersize 57.731-57.750 mm
Second undersize 57.481-57.500 mm
Third undersize 57.237-57.250 mm
Fourth undersize 56.987-57.000 mm