The service life calculation
Even if they are manufactured according to the same process standard and are used under the same operating conditions, the life of the rails is not exactly the same. Therefore, the rated life as defined below can be used as a criterion for calculating the life of the rail.
●Nominal life
The service life of an linear guide system is subject
to slight variations even under the same operating
conditions.Therefore, it is necessary to use the
nominal life defined below as a reference value for
obtainingthe service life of the system.The nominal
life means the total travel distance that 90% of a
group of iden tem units can achieve without
flaking.
●Service lifeWhen calculating the rated service life (L), if the travel length and the number of reciprocating times are fixed, the service life time can be obtained from the right type.
※fH:Hardness factor

To maximize the load capacity of the linear guide system,the
hardness of the raceways needs to be between 58 and 64
HRC.If the hardness is lower than this range, the basic
dynamic load rating and the basic static loadrating
decrease.Therefore, it is necessary to multiply each rating by
the respective hardness factor.fH=1.0.

※fT:Temperature factor

The temperature of the service environment usually not
exceeds 80℃. fT =1.0
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※fC:Contact Factor
If multiple Guide blocks are closely arranged with
each other, it is difficult to achieve uniform load
distribution due to a moment load and the accuracy of
the mounting surface. In such applications, multiply
basic load ratings “C”and “C0 ” by the corresponding
contact factors in table1.
Note: If uneven load distribution is expected in a large machine,take into account
the respective contact factor indicated in Table1.

 ※fW:Load Factor

In general, reciprocating machines tend to
involve vibrations or impact during operation. It is
extremely di fficult to accurately determine
v i b r a t i o n s generated during high-speed
operation and impact during frequent start and
stop.Therefore, where the effects of speed and
vibration are estimated to be significant, divide
the basic dynamic load rating (C) by a load factor
selected from Table2 , which contains empirically
obtained data.01