1. Specifications Check
40
[Caution at Pressing]
Make sure to establish the pressing current limit value setting not to exceed 80% of the rated moment
(Ma and Mb) specified in the specifications for the reaction force moment caused by the pressing force
when pressing operation is conducted on the slider type.
If an excessive force exceeding the rated moment is applied, it may damage the guide and would
shorten the product life.
For the moment calculation, the figures below show the positions (where pointed with an arrow) that
the moment is applied. Take the moment applied position into consideration when calculating the
moment.
Ɣ Ma or Mb Datum Point for Offset
Example for Calculation
Explanation below describes an example when the
pressing is conducted with 50N to Ma direction at the
position shown on the right by SA7C Type.
The moment applied to the guide is;
Ma = (50mm + Offset Datum Position 46.5mm) × 50N
= 4825N•mm
= 4.825N•m
The dynamic allowable load moment for SA7C is Ma = 10N•m.
Up to 8N•m, which is 80% of 10N•m, is acceptable for SA7C.
As the calculation result 4.825N•m is below 8N•m, it can be defined acceptable for pressing.
Also, when the moment in Mb direction occurs by the pressing, confirm that the moment is 80% or
below the dynamic allowable load moment in Mb direction by conducting a calculation in the same
manner.
50mm
Reaction force
moment
