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Home Page>Product & Technical>Technical Information>Internal Clearance BEARING RADIAL INTERNAL CLEARANCES Demands for standard radial clearances of HCH & CTK deep groove ball bearings are the same as those of IOS 5753.It is classfied into C2,standard,C3,C4. Different choices are supplied to various usages by customers. The radial clearance of bearings with electric motor quality. Bore CM Over Including min max mm Inch mm Inch um um 10 0.3937 18 0.7087 4 11 18 0.7087 24 0.9449 5 12 24 0.9449 30 1.1811 5 12 30 1.1811 40 1.5748 9 17 40 1.5748 50 1.9685 9 17 50 1.9685 65 2.5591 12 22 Datas of the mini-deep groove bearings under no load as followed: Tolerance in um Bore Inch R Series C2 NORMAL C3 C4 Over Including mm Inch mm Inch min max min max min max min 2.5 0.0984 10 0.3937 R2-R6 0 7 2 13 8 23 14 10 0.3937 18 0.7087 R8-R10 0 9 3 18 11 25 18 18 0.7087 24 0.9449 R12-R14 0 10 5 20 13 58 20 24 0.9449 30 1.1811 R16-R18 1 11 5 20 13 28 23 30 1.1811 40 1.5748 R20-R24 1 11 6 20 15 33 28 40 1.5748 50 1.9685 1 11 6 23 18 36 30 50 1.9685 65 2.5591 1 12 8 28 23 43 38 Datas of the mini-deep groove bearings under no load as followed: Tolerance in um Clearance code MC1 MC2 MC3 MC4 MC5 Clearance min max min max min max min max min max 1 6 4 9 6 11 9 14 15 22

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