Bearing application skills: bearing fit tolerance
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And the shaft or housing bore bearing with the tolerance grade and precision bearings. And the bearing grade P0 accuracy with the shaft, the tolerance level is generally IT6, bearing seat hole is IT7. Stability of rotary accuracy and operation of the occasions with higher requirements (such as motors), should choose the axis is IT5, the bearing seat hole for the IT6.
2 selection of tolerance zones
Equivalent radial load P into "light", "normal" and "heavy" load several cases, the bearing dynamic load rating C relationship:
Light load P ≤ 0.06C normal load 0.06C < P 0.12C heavy load 0.12C < P
1) shaft tolerance
Install the bearing and angular contact bearing shaft tolerance zone according to the tolerance zone table. On most occasions, the same axis and radial load direction, namely bearing inner ring relative to the load of the direction of rotation of the occasion, the general should choose transition or interference fit. Static axial and radial load direction, namely the bearing inner ring relative to the loading direction is still occasions, can choose the transition or small clearance fit (the gap is too large is not allowed).
2) shell hole tolerance zone
The housing bore tolerances installation radial bearing and angular contact bearings with reference to the corresponding tolerance table. Choice attention to the load direction or rotation of the outer ring, should avoid clearance. Equivalent radial load size also affects the outer ring fit.
3) form block structure bearing selection
The bearing seat of rolling bearings unless there is a special need, the general use of the whole structure, split bearings only in the assembly is difficult, or in the assembly is convenient to become the main consideration to the point, but it can not be used in tight fit or more precise matching, such as K7 and K7 more than tight fit, and as the tolerance level of IT6 or more precise hole, may adopt a split bearing.
234407BM 234706BM 234406BM 517/2860V/YA 5610/2500 517/1720X1V 527/1181M 510/1180M 517/930 510/670 590/560 510/500 52780 59080 517/368M 51760U 517/238 6207-2ZN 6206-2ZN 6205-2ZN 6204-2ZN 6203-RZ 6203-2ZN 6202N 6202-2ZN 6201-2ZN 6200ZZ 6200-2ZN 62/32-ZN 62/32-Z 62/32N 62/32-2Z 62/32-2RZ 62/32-2RS 62/28-2RZ 62/22-2RZ 61996 61992 61988 61984
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1 Selection of tolerance gradeAnd the shaft or housing bore bearing with the tolerance grade and precision bearings. And the bearing grade P0 accuracy with the shaft, the tolerance level is generally IT6, bearing seat hole is IT7. Stability of rotary accuracy and operation of the occasions with higher requirements (such as motors), should choose the axis is IT5, the bearing seat hole for the IT6.
2 selection of tolerance zones
Equivalent radial load P into "light", "normal" and "heavy" load several cases, the bearing dynamic load rating C relationship:
Light load P ≤ 0.06C normal load 0.06C < P 0.12C heavy load 0.12C < P
1) shaft tolerance
Install the bearing and angular contact bearing shaft tolerance zone according to the tolerance zone table. On most occasions, the same axis and radial load direction, namely bearing inner ring relative to the load of the direction of rotation of the occasion, the general should choose transition or interference fit. Static axial and radial load direction, namely the bearing inner ring relative to the loading direction is still occasions, can choose the transition or small clearance fit (the gap is too large is not allowed).
2) shell hole tolerance zone
The housing bore tolerances installation radial bearing and angular contact bearings with reference to the corresponding tolerance table. Choice attention to the load direction or rotation of the outer ring, should avoid clearance. Equivalent radial load size also affects the outer ring fit.
3) form block structure bearing selection
The bearing seat of rolling bearings unless there is a special need, the general use of the whole structure, split bearings only in the assembly is difficult, or in the assembly is convenient to become the main consideration to the point, but it can not be used in tight fit or more precise matching, such as K7 and K7 more than tight fit, and as the tolerance level of IT6 or more precise hole, may adopt a split bearing.
