Product Description
6306ZZ is a single row deep groove ball bearing assembly, double shielded (ZZ designation) with a 30 mm bore diameter, 72 mm outer diameter, and 19 mm width. It is constructed of precision bearing steel with a pressed cage, designed for radial loads in manual pallet jack applications. Cross-references include SKF, NSK, Koyo, and FAG 6306ZZ equivalents; it supersedes 6306Z, 6306 (open), and 6306-2RS variants.
Specifications
Material
| Inner/Outer Ring Material | Bearing grade steel |
| Rolling Element Material | Bearing grade steel |
Part Numbers
| Cross-Reference Part Numbers | Equivalent to SKF 6306ZZ, NSK 6306ZZ, Koyo 6306ZZ, FAG 6306ZZ |
| OEM Part Number | 6306ZZ |
| Replaces/Supersedes Part Numbers | Replaces 6306Z, supersedes 6306Z, 6306 (open), 6306-2RS (sealed type) |
| Equivalent/Interchange Part Numbers | Interchange: 6306ZZC3, 6306-2Z, 6306Z (single shield) |
Frequently Asked Questions
Q: What does the ZZ designation mean on the 6306ZZ bearing?
A: The ZZ designation indicates double metal shields on both sides of the bearing, providing complete sealed protection. The bearing comes pre-lubricated from the factory and does not require field lubrication, making it suitable for sealed applications.
Q: What are the specifications and dimensions of the 6306ZZ?
A: The 6306ZZ has a 30 mm bore diameter, 72 mm outer diameter, and 19 mm width. It is constructed from precision bearing steel with a pressed cage, double metal shields, and is rated for radial loads in manual pallet jack applications.
Q: What are the cross-references and equivalent part numbers for the 6306ZZ?
A: The 6306ZZ cross-references to SKF, NSK, Koyo, and FAG 6306ZZ equivalents. Interchangeable variants include 6306ZZC3 and 6306-2Z. It replaces 6306Z and 6306 (open type) bearings and supersedes 6306-2RS (sealed type) in many applications.
Q: What is the difference between the 6306ZZ and 6306-2RS bearing?
A: The 6306ZZ has double metal shields (ZZ) while the 6306-2RS has double rubber seals (2RS). The ZZ design provides superior sealing and longer service life in sealed applications. The 2RS design allows some lubrication access and is suitable for applications requiring periodic relubrication.
Q: What manual pallet jack models use the 6306ZZ bearing?
A: The 6306ZZ is compatible with wheel and roller assemblies on manual pallet jacks from Crown, Toyota, Raymond, Yale, Hyster, and other OEM manufacturers. Verify the 30 mm bore and 72 mm outer diameter dimensions match your equipment before ordering.
