Product Description
OD: 1.653 inch or 42MM; ID: 0.787 inch or 19.05MM; Width: 0.472 inch or 12MM
Frequently Asked Questions
Q: What are the dimensions of the BS 6004 ZZ bearing?
A: The BS 6004 ZZ has an outer diameter of 1.653 inches (42mm), inner diameter of 0.787 inches (19.05mm), and width of 0.472 inches (12mm). These dimensions are standard for 6004-series deep groove ball bearings used across Crown, Toyota, Raymond, and other manual pallet jack manufacturers.
Q: What does the ZZ designation mean?
A: The ZZ designation indicates the bearing has metal (steel) shields on both sides rather than rubber seals. The metal shields provide some dust and contamination protection while allowing slight grease flow. ZZ bearings are lighter and operate at slightly lower temperatures compared to 2RS rubber-sealed variants.
Q: When should I use BS 6004 ZZ instead of BS 6004 2RS?
A: Use the BS 6004 ZZ in high-speed or high-temperature applications where rubber seal friction is a concern, or when the bearing contacts hot surfaces. The ZZ metal shields also work better in extremely wet environments where rubber seals might swell. For standard warehouse and cold storage use, the 2RS is typically preferred.
Q: Is the BS 6004 ZZ sealed, or does it require lubrication?
A: The BS 6004 ZZ comes factory-lubricated with grease. The metal shields retain some grease but allow limited migration over time. In high-speed or continuous-duty applications, periodic grease replenishment may extend bearing life. For most material handling equipment operating at standard speeds, no additional lubrication is required during the bearing life.
Q: What equipment models use the BS 6004 ZZ bearing?
A: The BS 6004 ZZ is used in various load wheels and drive bearings across pallet jacks and industrial carts from Crown, Toyota, Raymond, Yale, and Hyster. Confirm the bore (19.05mm), outer diameter (42mm), and axle width by measuring your equipment before ordering.