Deep Groove Sealed Ball Bearing for Pallet Jacks
6306DDU
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Compatibility
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Reference Diagrams
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Product Description
The 6306DDU is a deep groove sealed radial ball bearing assembly for manual pallet jack wheels and load rollers, specified with a 30 mm bore, 72 mm outside diameter, 19 mm width, SAE 52100 bearing steel, and DDU full-contact rubber seals. Compatible with major OEM and aftermarket cross-reference numbers.
Specifications
Material
| Material Specification | SAE 52100 high-carbon chromium bearing steel |
| Hardness | Rockwell C58–64 (raceways) |
| Seal Material | Synthetic nitrile rubber compound |
Part Numbers
| OEM Part Number | 6306DDU |
| Cross-Reference Part Numbers | Equivalent to NSK 6306DDU, replaces 6306-2RS, supersedes 6306DDU-C3 |
| Manufacturer Part Number | 6306DDU |
| Interchange Part Numbers | NSK 6306 DDU, SKF 6306-2RS1, FAG 6306.2RSR |
Frequently Asked Questions
Q: What are the dimensions of the 6306DDU bearing assembly?
A: The 6306DDU has a 30 mm bore diameter, 72 mm outside diameter, and 19 mm width. It is a deep groove sealed radial ball bearing designed for manual pallet jack wheels and load rollers.
Q: What material is the 6306DDU bearing made from?
A: The 6306DDU is manufactured from SAE 52100 bearing steel, a high-carbon chromium alloy that provides superior hardness, wear resistance, and load-carrying capacity. This material choice delivers durability in repetitive loading environments common to pallet jack applications.
Q: What is DDU seal type and how does it protect the bearing?
A: DDU designates full-contact rubber seals on both sides of the bearing. These seals provide maximum contamination exclusion and grease retention compared to open or shielded designs, making the 6306DDU ideal for wet, dusty, or dirty warehouse environments.
Q: What cross-reference part numbers are equivalent to the 6306DDU?
A: The 6306DDU is equivalent to NSK 6306DDU, replaces 6306-2RS, and supersedes 6306DDU-C3. Cross-references include SKF 6306-2RS1 and FAG 6306.2RSR. Verify your equipment bearing specification before ordering to ensure correct replacement.
Q: Is the 6306DDU factory greased?
A: The 6306DDU is factory greased and sealed, ready for installation in manual pallet jack applications. The full-contact DDU seals retain grease during operation and prevent water and debris ingress in material-handling environments.
