B/C/D sheaves, ANSI standard.
Sheaves bore: Stock bore or QD bore.
Size as follows:
2B54Q to 2B380R, 3B54Q to 3B380R, 4B54Q to 4B380R, 5B70R to 5B380R,
6B70R to 6B380R, 8B54Q to 8B380S, 10B54Q to 10B380U.
1B34SH to 1B200SK, 2B34SH to 2B380SF, 3B34SH to 3B380E, 4B34SD to
4B380E, 5B34SD to 5B380E, 6B34SD to 6B380E, 10B54SK to 6B380J.
1C56P to 1C60Q, 2C56P to 2C440R, 3C50Q to 3C500S, 4C50Q to 4C500U,
5C90R to 5C500R, 6C90R to 6C500R, 7C70Q to 7C500S, 8C70Q to 8C500U,
10C80R to 10C500U.
2C70SF to 2C300F, 3C50SD to 3C500F, 4C50SD to 4C500J, 5C60SF to
5C500J, 6C60SF to 6C500M, 8C80E to 8C500M.