Thomson currently has two account systems - one for the website and CAD model downloads, and one for e-commerce. We understand that two logins is an inconvenience and are working to consolidate our systems into one login process. Until we’re able to consolidate the two logins, please follow these guidelines:
The calculator derives the expected life in inches of travel (Inch Calculator), or the expected number of revolutions (Metric Calculator) of a ball nut operating at a load which is different than the rated dynamic load.
in
Divide Ball Nut Life by the following Fatigue Factor (f).
Operation Condition
f
No External Vibration
1.0 – 1.2
Indirect Vibration
1.2 – 1.5
Direct Vibration OR High Cyclical Impact
1.5 – 2.5
Direct Vibration AND High Cyclical Impact
2.5 – 3.5
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