| The Load rating of SAMICK Linear Bushing can be affected
by the balls orientation against the Load. The Basic Load rating in
the table is the Load rating of Linear Bushing when 1(one) Ball circuit
are just been eath the load. As shown in Table, if the Ball are located
on symmetrical position against the Load, the Load rating will be
increased and the tavel life will be extened. |
 |
| |
Orientation
of Balls |
| No. of Ball Row |
4Row |
5Row |
6Row |
| Max.Load |
 |
 |
 |
| Equation |
F = 1.41 ¡¿ C |
F = 1.46 ¡¿ C |
F = 1.26 ¡¿ C |
| Min.Load |
 |
 |
 |
| Equation |
F = C |
F = C |
F = C |
|
 |
| The travel life of a Linear Bushing is determined largely
by the quality of the shaft. The Basic Dynamic load rating is maximum
continuous load that can be applied to the Linear Bushing with 90%
of reliability achieving after 50km traveling under normal conditions.
The norminal travel life can be calculated by follow equation. |
 |
| Practically, other factors (Hardness factor, Load factor,
Contact factor, etc) will affect the life as follows. |
 |
 |
| If a Linear Bushing or two Linear Bushing laid beside
one another on one shaft and the moment load is applied calculate
the Equivalent load. |
 |
| If the moment load and the radial load are applied,
the travel life can be calculated by the sum of the moment load and
the radial load. From the above equations, the stroke and frequency
are constant: the travel life can be calculated by following equcation. |
 |
 |
| Equivalent
factor (K) |
| P/N |
1EA |
2EA |
P/N |
1EA |
P/N |
1EA |
2EA |
| LM 5 |
1.253 |
0.178 |
LM 5L |
0.223 |
LME 5 |
0.669 |
0.123 |
| LM 6 |
0.553 |
0.162 |
LM 6L |
0.201 |
LME 8 |
0.514 |
0.116 |
| LM 8S |
0.708 |
0.166 |
LM 8L |
0.151 |
LME 12 |
0.389 |
0.090 |
| LM 8 |
0.442 |
0.128 |
LM 10L |
0.118 |
LME 16 |
0.343 |
0.081 |
| LM 10 |
0.389 |
0.101 |
LM 12L |
0.113 |
LME 20 |
0.291 |
0.063 |
| LM 12 |
0.389 |
0.097 |
LM 13L |
0.107 |
LME 25 |
0.209 |
0.052 |
| LM 13 |
0.343 |
0.093 |
LM 16L |
0.096 |
LME 30 |
0.167 |
0.045 |
| LM 16 |
0.279 |
0.084 |
LM 20L |
0.082 |
LME 40 |
0.127 |
0.039 |
| LM 20 |
0.257 |
0.071 |
LM 25L |
0.060 |
LME 50 |
0.105 |
0.031 |
| LM 25 |
0.163 |
0.054 |
LM 30L |
0.053 |
LME 60 |
0.093 |
0.024 |
| LM 30 |
0.153 |
0.049 |
LM 35L |
0.050 |
|
|
|
| LM 35 |
0.143 |
0.045 |
LM 40L |
0.043 |
|
|
|
| LM 40 |
0.117 |
0.040 |
LM 50L |
0.034 |
|
|
|
| LM 50 |
0.096 |
0.032 |
LM 60L |
0.031 |
|
|
|
| LM 60 |
0.093 |
0.028 |
|
|
|
|
|
|
Note 1) The equivalent factor for LMF/K/H, LMFP/KP/HP
and SC types are same as LM type.
Note 2) The equivalent factor for LMF-L, LMK-L, LMH-L and SCW types
are same as LM-L type.
Note 3) The equivalent factor for LMEF/K/H and SCE types are same
as LME type. |
 |
 |
| In applications when the stoke is short, the life of
the shaft is shorter than that of the Linear Bushing. In short stroke
applications, the required dynamic load rating must be multiplied
by the shot stroke correction factor (Kc) found on Fig right side. |
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