Shatz bearing

Below is a listing of prefixes and suffixes used in the identification of Schatz ball bearings. These letters are used, either singly or in various combinations, with the basic numbers, which express the bore size in 64ths of an inch and the outer diameter size in 32nds of an inch. When the bore or outside diameter is not an exact 64th or 32nd part of an inch respectively, the nearest 64th or 32nd of an inch is used in the bearing identification number and a suffix letter A, B, C, etc., is assigned to the bearing number to indicate a non-exact 64th bore and/or a non-exact 32nd outside diameter size. In addition, these same letters are used to differentiate between bearings with the same bore and outside diameter sizes but having other modifications.

How to read SCHATZ ball bearings numbers:

EXAMPLE: 1240DP

1240 - Basic bearing number
DP - Dustproof type bearing

Part number system