Inspection and Test
¡¡¡¡From raw material to each fabrication step, bearing is 100£¥ inspected strictly to ensure the quality. The examination item of plain bearing is shown on the table.
¡¡¡¡Plain bearing examiation item and test device
|
Serial number |
Examination item |
Test device |
Remarks |
|
1. |
Residual magnetization(¡Ü0.4mT) |
Reidual magnetiwm meter |
Q9921
CJZ-1A |
|
2. |
Vibration(noise) |
S0910-1 BVT-1 |
|
|
3.
a. |
Tolerance of dimension
Bore deviation and variaion
¡÷ds ¡÷Dmp VDp VDmp |
D923 D924
D712 D713 |
|
|
b. |
OD deviation and variation
¡÷Ds ¡÷Dmp VDp VDmp |
D051
D923 D14 |
|
|
c. |
Inner ring width and variation
¡÷Bs VBs |
G903¡«G905
G803 |
|
|
d. |
Inner ring width and variation
¡÷Cs Vcs |
G903¡«G905
G803 |
|
|
e. |
Fitting chamfering dimension |
Limit coupon |
|
|
4.
a. |
Accuracy of rotation
Kia inner ring radial runout |
B002 B023A |
|
|
b. |
Kia outer ring radial runout |
B002 B013 B014A |
|
|
c. |
Runout between inner ring reference plane and bore |
B002 C923 |
|
|
d. |
Tilt variation between OD surface baseline and reference plane |
B002 |
|
|
e. |
Sia runout between inner ring plane and groove |
B002 B023A |
|
|
f. |
Sea runout between outer ring plane and groove |
B002 B013 B014A |
|
|
5. |
Cr radial plqy |
X093J X094J |
|
|
6.
a. |
Heat treatment quality
Hardness(AISI52100 HRC61-65 AISI440C HRC ¡Ý58 AISI420C HRC¡Ý55) |
Durometer |
|
|
b. |
Material and metallographic analysis |
Microscope |
|
|
7.
a. |
Apparent quality
Rotating flexibility |
Feeling |
|
|
b. |
Shield or seal ring mark and fastness |
Visual and feeling |
|
|
c. |
Package condition |
Visual examnation |
|
|
