IAI America RCA2-SD4N - Manual (Page 86)

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1. Life
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11. Life
11.1 Life of Actuator Using Ball Screws
Refer to the following for the product life of the ball screw type actuator assuming it was operated
under the condition of maximum transportable weight, maximum acceleration and deceleration.
Model Product Life (Reference)
RA2AC , RA2AR 5000km
RN3NA, RP3NA, GS3NA, GD3NA,
SD3NA, RN3N , RP3N , GS3N ,
GD3N , SD3N
Lead 1mm
3000km
RN3NA, RP3NA, GS3NA, GD3NA,
SD3NA, RN3N , RP3N , GS3N ,
GD3N , SD3N
Lead 2mm , 4mm
5000km
RN4NA, RP4NA, GS4NA, GD4NA,
SD4NA, RN4N , RP4N , GS4N ,
GD4N , SD4N
5000km
11.2 Life of Actuator Using Lead Screws
The lead screw actuators adopt a lead screw and their nut wears over time.
A reference for product life is presented based on the wear amount of the nut.
The positioning precision of this product, such as lost motion, will drop as the wear of the nut
progresses.
(Reference product life of lead screw types)
Horizontal application 10 million back-and-forth operations
Vertical application 5 million back-and-forth operations
11.2.1 Relationship of Cycle Time and Product Life
(1) Horizontal application
The graph below shows the relationship between the cycle time for one back-and-forth operation
and the life of the product in a horizontal application (product life: 10 million back-and-forth
operations).
The lines based on 8 hours of operation and 24 hours operations a day, for 240 days a year, are
shown. Use this graph as a reference when determining the product life.