HZK There is an inner ring RNA.NK type needle roller bearing. Since the inner ring has no rib, the inner ring, outer ring, a full set of needle rollers and cages can be installed separately, and the axial displacement of the shaft or housing is not restricted. Since the needle rollers are separated by a cage, the friction is reduced, so it can be used in parts with high rotation speed.
Common models of needle roller bearings available through HZK Bearing include the RNA49xx Series, RNA59xx Series, RNA69xx Series, NK, NA49xx Series, NA59xx Series, NA69xx Series, NKI Series, RNAF Series, NAFW Series, IR Series, IRZ Series, KT Series.
NA and NKI Type Needle Roller Bearings with Double Outer Rings (or Double Locking Rings) and Cages
The inner and outer rings (with locking rings, a complete set of needle rollers, and a cage) can be installed separately. They are suitable for high speeds and are available in single and double rows.
If the shaft cannot serve as a raceway, that is, if hardening and grinding the shaft is impossible or uneconomical, these needle roller bearings with inner rings can be used.
NA and NKI type bearings without inner rings are RNA and NK type needle roller bearings.
These bearings lack inner rings and are suitable for bearings with restricted radial dimensions. The shaft journal serves directly as the rolling surface. The shaft, which serves as the raceway, must be hardened and ground. Only when it is machined to the appropriate dimensional and shape accuracy can the complete needle roller bearing achieve a long life and high operating accuracy. Furthermore, the lack of an inner ring allows the shaft diameter to be increased, thereby increasing rigidity.
Model number | Basic dimensions(mm) d | Basic dimensions(mm) D | Basic dimensions(mm) B | Limiting speed (1) (rpm) Grease lubrication | Limiting speed (1) (rpm) oil lubrication | Rated load (N) Cr | Rated load (N) Cor | Weight ≈kg |
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Shandong HZK Bearing Factory, located in Panzhuang Industrial Park, Linqing City, Shandong Province, covers a total building area of over 10,000 square meters. HZK BEARING FACTORY mainly produces and sells spherical roller bearings, cylindrical roller bearings, deep groove ball bearings, tapered roller bearings, thrust self-aligning roller bearings, automotive wheel bearings, and more. The factory is equipped with fully automated workshops, heat treatment equipment, lathes, grinding machines, ultra-precision equipment, and assembly facilities. We utilize industry-leading production equipment and testing instruments, and have multi-story warehouses to fully guarantee bearing quality and delivery speed. HZK BEARING also customizes various non-standard products. We welcome customers to visit our factory for guidance, business negotiations, and mutual development.
faq
Q: What is your delivery time?
A: If the goods are in stock, it generally takes 5-10 days. If the goods are not in stock, it takes 15-20 days depending on the quantity.
Q: How are you packaged?
A: Packaging can be customized according to customer requirements.
Q: Are we a trading company or a manufacturer?
A: We are a manufacturer with our own factory.
Q: I want a specific size or color of goods, can you customize it?
A: We provide rolls and sheets, as well as post-processing services such as logo printing.
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