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Send Inquiry | Bearing No. | Dimension（mm） | Basic Load Rating（kN） | Limit speed （r/min） | Fitting dimension （mm） | Weigh（kg） | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| d | D | B | rsmin | r1smin | F | E | Cr | Cor | Grease | Oil | da（min） | da（max） | db（min） | Da（max） | Da（min） | ra（max） | rb（max） | ||||
Double row cylindrical roller bearings are movable bearings, and their separability makes installation and disassembly very convenient. Both rings can be fitted tightly. NN30 series cylindrical roller bearings with tapered holes are mainly used as radial supports for machine tool spindles. In order to meet this use requirements, the NNU49 series and N19, N10 single-row cylindrical roller bearings can also be used.
Basic types:
Dual row cylindrical roller bearings in the NN3000K and NNU4900K series have high radial stiffness with high load carrying capacity and high precision. The axial load is usually borne by series 2344 and series 2349 two-way thrust angular contact ball bearings. The NN type inner ring has three guards, and the foreign side has no guards: the NNU series outer picture has three guards, and the inner picture has no guards.
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