MX80L Series Product Manual
Chapter 2 – MX80L Series Table Specifications
Parker Hannifin Corporation
Daedal Division
Irwin, Pennsylvania
21
Linear Motion Guide Bearing Life/Load
Computation
To predict the travel life of the MX80L cross roller bearings under a moment load use the curve with the
corresponding lever arm and given load. Factor in dynamic as well as static loads. For compound loading
(multiple moments) use an “effective lever arm of 2x actual lever arm.
Example:
Given a MX80L-T02 with a 2 kg load mounted 35 mm off of the end
of the carriage in line with the travel path. The lever arm is 35 mm
+ 40 mm (center of table to edge) = 75 mm
This loading produces a pitch moment. Therefore, using the Pitch
curve for the 50mm travel, draw a vertical line up from the x-axis at
the 2 kg load point until it intersects the 75 curve. The point of
intersect is the predicted bearing life of the table. In this example
the life is 10,000 km of travel
Life-Moment Chart 50mm travel Pitch-Yaw Loading
25
50
75
100
150
200
250
300
100
1000
10000
100000
0
1
2
3
4
5
6
7
8
Load [kg]
L
ife
[k
m
]
Force
Force
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