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:
Life is typically rated at 90% confidence (L10 standard), which
represents time at which 90% of assemblies still perform. The dynamic
load rating can be used to calculate the L10 life of the screw system.
For inch series screws L10 life is calculated in inches of travel by the equation:
For Metric series screws L10 life is calculated in revolutions of travel by the equation:
C = Dynamic load rating of the Ball nut
Inch - Lbs for 1 million inches of travel
Metric - N or kN for 1 million revolutions
F = Operating load - lbs. N or kN to match the dynamic load rating units.