SKF NN3020KTN9/SP · double-row precision cylindrical roller bearing
Double-row precision cylindrical roller for machine-tool spindles. 100 mm bore, tapered, SP class.
- SKU
- MS-IP-0341
- Era
- 1950-2000
- Condition
- NOS, original SKF preservative, unopened factory tin. Date code 1994.
- Dimensions
- 150 mm OD × 100 mm bore × 37 mm wide
- Weight
- 5 lb 8 oz
- Provenance
- Estate purchase from a retired spindle rebuilder in Cleveland, 2020.
- Category
- Obsolete Industrial Parts
- Tags
- skfprecision-bearingspindlemachine-toolnos
A double-row cylindrical roller bearing in SP tolerance class, 100 mm bore, tapered 1:12 inner ring, polyamide cage. The workhorse of medium-frame lathe and grinder spindles for four decades — Cincinnati, Warner & Swasey, older DMG and Weiler machines all called for this exact designation.
The NN3020KTN9/SP is still cataloged, but the 1994 production runs used a slightly different cage geometry that some rebuilders swear by for the older Cincinnati Milacron spindles. This is one of those older ones, in the original green SKF tin.
Internal clearance is coded C9NA. Preservative is intact and the rollers spin true and silent under hand load.
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