Housing tolerances and resultant fits

Housing
Nominal
bore diameter
Bearing
Outside diameter
tolerance
Housing bore diameter deviations, resultant fits1)
Tolerance classes
D tΔDmp K6Ⓔ K7Ⓔ M5Ⓔ M6Ⓔ M7Ⓔ


Deviations (housing bore diameter)


Theoretical interference (–)/clearance (+)
over incl. low high Probable interference (–)/clearance (+)
mm µm µm














6 10 0 –8 –7 +2 –10 +5 –10 –4 –12 –3 –15 0




–7 +10 –10 +13 –10 +4 –12 +5 –15 +8




–5 +8 –7 +10 –8 +2 –10 +3 –12 +5














10 18 0 –8 –9 +2 –12 +6 –12 –4 –15 –4 –18 0




–9 +10 –12 +14 –12 +4 –15 +4 –18 +8




–7 +8 –9 +11 –10 +2 –13 +2 –15 +5














18 30 0 –9 –11 +2 –15 +6 –14 –4 –17 –4 –21 0




–11 +11 –15 +15 –14 +4 –17 +5 –21 +9




–8 +8 –12 +12 –12 +2 –14 +2 –18 +6














30 50 0 –11 –13 +3 –18 +7 –16 –5 –20 –4 –25 0




–13 +14 –18 +18 –16 +6 –20 +7 –25 +11




–10 +11 –14 +14 –13 +3 –17 +4 –21 +7














50 80 0 –13 –15 +4 –21 +9 –19 –6 –24 –5 –30 0




–15 +17 –21 +22 –19 +7 –24 +8 –30 +13




–11 +13 –16 +17 –16 +4 –20 +4 –25 +8














80 120 0 –15 –18 +4 –25 +10 –23 –8 –28 –6 –35 0




–18 +19 –25 +25 –23 +7 –28 +9 –35 +15




–13 +14 –20 +20 –19 +3 –23 +4 –30 +10














120 150 0 –18 –21 +4 –28 +12 –27 –9 –33 –8 –40 0




–21 +22 –28 +30 –27 +9 –33 +10 –40 +18




–15 +16 –21 +23 –22 +4 –27 +4 –33 +11














150 180 0 –25 –21 +4 –28 +12 –27 –9 –33 –8 –40 0




–21 +29 –28 +37 –27 +16 –33 +17 –40 +25




–14 +22 –20 +29 –21 +10 –26 +10 –32 +17














180 250 0 –30 –24 +5 –33 +13 –31 –11 –37 –8 –46 0




–24 +35 –33 +43 –31 +19 –37 +22 –46 +30




–16 +27 –23 +33 –25 +13 –29 +14 –36 +20














250 315 0 –35 –27 +5 –36 +16 –36 –13 –41 –9 –52 0




–27 +40 –36 +51 –36 +22 –41 +26 –52 +35




–18 +31 –24 +39 –28 +14 –32 +17 –40 +23














315 400 0 –40 –29 +7 –40 +17 –39 –14 –46 –10 –57 0




–29 +47 –40 +57 –39 +26 –46 +30 –57 +40




–18 +36 –27 +44 –31 +18 –35 +19 –44 +27














400 500 0 –45 –32 +8 –45 +18 –43 –16 –50 –10 –63 0




–32 +53 –45 +63 –43 +29 –50 +35 –63 +45




–20 +41 –30 +48 –34 +20 –38 +23 –48 +30














500 630 0 –50 –44 0 –70 0 –70 –26 –96 –26




–44 +50 –70 +50 –70 +24 –96 +24




–31 +37 –54 +34 –57 +11 –80 +8














630 800 0 –75 –50 0 –80 0 –80 –30 –110 –30




–50 +75 –80 +75 –80 +45 –110 +45




–33 +58 –58 +53 –63 +28 –88 +23














800 1 000 0 –100 –56 0 –90 0 –90 –34 –124 –34




–56 +100 –90 +100 –90 +66 –124 +66




–36 +80 –63 +73 –70 +46 –97 +39














1 000 1 250 0 –125 –66 0 –105 0 –106 –40 –145 –40




–66 +125 –105 +125 –106 +85 –145 +85




–42 +101 –72 +92 –82 +61 –112 +52














1 250 1 600 0 –160 –78 0 –125 0 –126 –48 –173 –48




–78 +160 –125 +160 –126 +112 –173 +112




–48 +130 –85 +120 –96 +82 –133 +72














1 600 2 000 0 –200 –92 0 –150 0 –158 –58 –208 –58




–92 +200 –150 +200 –150 +142 –208 +142




–57 +165 –100 +150 –115 +107 –158 +92














2 000 2 500 0 –250 –110 0 –175 0 –178 –68 –243 –68




–110 +250 –175 +250 –178 +182 –243 +182




–67 +207 –116 +191 –135 +139 –184 +123














  1. 1) Values are valid for most bearings with Normal tolerances. For exceptions, refer to Tolerances and resultant fits.

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