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Accuracy
The linear optical shaft can ensure high accuracy of OD tolerance, straightness, circular degree and surface roughness of shaft with accumulated techniques.
The allowable tolerance of OD tolerance of linear optical shaft to diameter line bearing incircle diameter has proper clearance. The tolerance of solid shaft must be adjusted under precise operation so as to prevent clearance or added with slight pressure.
If the straightness or circular degree of shaft is not proper, adding regular pressure on solid shaft or linear bearing can’t achieve smooth linear motion but will reduce lifetime, thus it is necessary to pay attention to selection of linear optical shaft.
Shaft accuracy
|
OD Separation (mm) |
Allowable Tolerance of Bearing (μm) |
Circular Degree |
Surface Roughness |
|
Over |
Below |
g6 |
h6 |
h5 |
|
4 |
6 |
-4
-12 |
0
-8 |
0
-5 |
Below 4 |
Below 1.5μmRmax |
|
6 |
10 |
-5
-14 |
0
-9 |
0
-6 |
|
10 |
16 |
-6
-17 |
0
-11 |
0
-8 |
Below 5 |
|
16 |
30 |
-7
-20 |
0
-13 |
0
-9 |
|
30 |
50 |
-9
-25 |
0
-16 |
0
-11 |
Below 6 |
|
50 |
80 |
-10
-29 |
0
-19 |
0
-13 |
Below 8 |
|
80 |
120 |
-12
-34 |
0
-22 |
0
-15 |
Straightness of shaft
(1) The straightness is less than 0.005mm when the shaft length is less than 100mm.
(2) When the shaft length is greater than 100mm, the following formula shall be obeyed:straightness=（shaft length×0.005）/100 | 
