Over-coupling: The diameter of the shaft may be larger or smaller than the inner diameter of the bearing.
Interference fit: The diameter of the shaft is larger than the inner diameter of the bearing. (You will ask how to install the shaft, there are many ways. Common heating bearings make the inner diameter of the bearing larger)
Intermittent fit: The diameter of the shaft is smaller than the inner diameter of the bearing. (For example, like the cooperation of wheels and axles, it’s good to roll
)
Tolerance level. GB/T1804-2000 Limit value of linear dimension
Tolerance level
0.5～3 >3～6>6～30>30～120>120～400>400～1000>1000～2000>2000～4000
Precision f ±0.05 ±0.05 ±0.1 ±0.15 ±0.2 ±0.3 ±0.5
Medium m ±0.1 ±0.1 ±0.2 ±0.3 ±0.5 ±0.8 ±1.2 ±2
Rough c ±0.2 ±0.3 ±0.5 ±0.8 ±1.2 ±2 ±3 ±4
The thickest v ±0.5 ±1 ±1.5 ±2.5 ±4 ±6 ±8
(GB/T1804-2000) Limit deviation values of rounding radius and chamfer height dimension
Tolerance level
0.5～3 >3～6 >6～30 >30
Precision f ±0.2 ±0.5 ±1 ±2
Medium m
Rough c ±0.4 ±1 ±2 ±4
The thickest v
Note: For the meaning of rounding radius and chamfer height, see GB/T6403.4
(GB/1804-2000) Limit deviation value of angular dimension
Tolerance level length segmentation
～10 >10～50 >50～120 >120～400 >400
Precision f ±1° ±30' ±20' ±10' ±5'
Medium m
Rough c ±1°30' ±1° ±30' ±15' ±10'
The thickest v ±3° ±2° ±1° ±30' ±20'
(GB/T1184-1996) Unfilled tolerance values for straightness and flatness
Tolerance level
≤10 >10～30 >30～100 >100～300 >300～1000 >1000～3000
H 0.02 0.05 0.1 0.2 0.3 0.4
K 0.05 0.1 0.2 0.4 0.6 0.8
L 0.1 0.2 0.4 0.8 1.2 1.6
(GB/T1184-1996) Verticality unfilled tolerance value
Tolerance level
≤100 >100～300 >300～1000 >1000～3000
H 0.2 0.3 0.4 0.5
K 0.4 0.6 0.8 1
L 0.6 1 1.5 2
(GB/T1184-1996) Symmetry degree unfilled tolerance value
Tolerance level
≤100 >100～300 >300～1000 >1000～3000
H 0.5
K 0.6 0.8 1
L 0.6 1 1.5 2
(GB/T1184-1996) Unbounced tolerance value of round jump
Tolerance level
H 0.1
K 0.2
L 0.5
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