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| | | System of Limits and Fits | | |
| | | Excerpts from JIS B 0401:1998 | | |
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| | | Table of Common Hole Basic Fits | | |
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| | | | | | | | | | | | | | | | | | | | | | | | | | Basic hole | Shaft tolerance classes | | | | Clearance fit | Transition fit | Interference fit | | | | H 6 | | | | | | P5 | h5 | js5 | k5 | m5 | | | | | | | | | | | | | | | f6 | | h6 | js6 | k6 | m6 | n6* | p6* | | | | | | | | | H 7 | | | | | f6 | ge | h6 | js6 | k6 | m6 | n6 | p6* | r6* | s6 | t6 | u6 | x6 | | | | | | | e7 | f7 | | h7 | is7 | | | | | | | | | | | | | H 8 | | | | | f7 | | h7 | | | | | | | | | | | | | | | | | e8 | f8 | | h8 | | | | | | | | | | | | | | | | d9 | e9 | | | | | | | | | | | | | | | | | H 9 | | | d8 | e8 | | | h8 | | | | | | | | | | | | | | | c9 | d9 | e9 | | | h9 | | | | | | | | | | | | | | H10 | b9 | c9 | d9 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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| | | * There may be exceptions in these fits depending on dimension classes. | | |
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| | | Interrelation of Tolerance Classes for Hole Basis Fits often Used | | |
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| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Basic shaft | H6 | H7 | H8 | H9 | H10 | | | | Fits | Clearance fit | Transition fit | Interference fit | Clearance fit | Transition fit | Interference fit | Clearance fit | Clearance fit | Clearance fit | | | | Shaft tolerance class | f6 | 95 | ge | h5 | | js5 | s6 | k5 | k6 | m5 | | n6 | p6 | e7 | f6 | f7 | 96 | h6 | | js6 | S7 | k6 | m6 | | p6 | r6 | s6 | t6 | u6 | x6 | | e8 | e9 | f7 | f8 | h7 | h8 | c9 | d8 | d9 | e8 | e9 | h8 | h9 | b9 | c9 | d9 | | | | 50 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ; | | | | Q | | | | | | | | | | | | I | | | | | | | | | | | | | | i | ï | a | | | | | | | | | | | | | 9 | | | | | | | | | | H8 | | | | | | | | | | | | | | | | | | | | x\ | | | | | | | | | | | | | | | | | | | | | | 3. _ m _eft | | 1 | ï | | | | | | | | | | 1 | | | 1 | y | | | | | | | | | | | | | | | 1 | 1 | 1 | ï | ï | | | | | i | i | 1 | | | | | | | i | Ï | | | | | mension lini I 3 c 3 c | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | \ | S | | | | 1 | 1 | S | | | 1 | | | | —150 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Ì | | | | | | | 1 | | i | | | | | | 1 | | | | —200 | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1 ï | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
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| | | • The above figure indicates the case where the basic dimension is 30mm. | | |
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| | | 188 | | |
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