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Attainable speeds

The attainable speeds listed in the product tables (→ single row bearings and double row bearings) are guideline values based on cylindrical roller bearings with a near zero radial internal clearance (→ Attainable speeds).
In applications where operating radial internal clearance > 0,002 mm or preload is applied or where seats and abutments do not meet accuracy requirements, the speed ratings must be reduced (→ Recommended shaft and housing fits and Accuracy of seats and abutments).
The attainable speeds for preloaded bearings in the N 10 and NN 30 series can be estimated using the guideline values listed in table 1. For attainable speeds of preloaded bearings in the NNU 49 series, contact the SKF application engineering service.
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