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Cincinnati Milling Products Division INTEROFFICE MEMORANDUM action copy TO: S. H. Vogely frpwk copies TOt J. T. Ryan Treat - Pile /= H Vi. G. Bancroft G. E. Baldwin R. C. Fisher (3) R. G. Hsmpelmann (4) W. E. Kaiser Mi G. Mieferf ~ ~ V7. Irvine oate: February 21, 1957 subject: Availability of diamond wheel core materials CUSTOMER: LOCATION: ORDER NO. WHEEL SIZE: SHAPE: GRADE: CONCENTRATE TYPE RE. LETTER DATED: A meeting was held with production people today' at-which certain limitations were-agreed upon'as to-the availability of diamond wheel core materials. These limitations are as follows: Aluminoid Core 0" thru 8" diameter Over 8U thru 12" diameter 1/8" thru 1" thick 3/16" thru 1" thick Abrasive Filled Phenolic Core Q"'thru 8" diameter Over 3" thru 12" diameter less-than 1/8" thick less than 3/16" thick This core is restricted to type D1 wheels. Metallic Aluminum Core Over 12" diameter All thicknesses Black Bakelite Core 0" thru 12" diameter (ercepr. cup wheels) Cuo Wheels 1/4" Tver L /A V :h General The abrasive/phenolic core is not machinable and is restricted to type D1 wheels. Within this limitation, and upon customer request, it may be used with the same restrictions as those placed on Black Bakelite. '" ` it MIL 000433