Product Description
OD: 2.834 inch or 72MM; ID: 1.181 inch or 30MM; Width: 0.748 inch or 19MM
Frequently Asked Questions
Q: What are the specifications of the BS 6306 ZZ bearing?
A: The BS 6306 ZZ is a deep groove ball bearing with an outer diameter of 2.834 inches (72 mm), an inner diameter of 1.181 inches (30 mm), and a width of 0.748 inches (19 mm). The ZZ designation indicates double steel shields on both sides for grease retention and contaminant exclusion without bearing contact.
Q: What are the cross-reference part numbers for the BS 6306 ZZ?
A: The BS 6306 ZZ is equivalent to 6306ZZ designations from NSK, SKF, Koyo, FAG, NTN, and SNR. Some suppliers also reference it as 6306-ZZ or 6306ZZC3 depending on precision grade and manufacturer. Verify the full specification sheet before substituting to ensure load rating and seal type match.
Q: Is the BS 6306 ZZ suitable for pallet jack wheel applications?
A: Yes, the BS 6306 ZZ is widely used in load wheel and caster assemblies for manual pallet jacks and electric material handling equipment from Crown, Toyota, Raymond, Yale, Hyster, and similar brands. Confirm bore and housing dimensions match your specific equipment before ordering.
Q: What operating conditions favor the ZZ shield configuration over 2RS seals?
A: The ZZ shields produce less friction and lower operating temperatures compared to 2RS contact seals. Choose ZZ for dry indoor warehouse environments operating at consistent room temperature. The shields do not contact the races, resulting in reduced drag and lower energy consumption in standard pallet jack applications.
Q: What is the typical radial load capacity of the BS 6306 ZZ?
A: The BS 6306 ZZ supports dynamic radial loads up to approximately 47 kN and static loads up to 68 kN, depending on precision grade (Class 0 per ISO/JIS is standard). Actual capacity depends on bearing material (typically high-carbon chromium steel), installation fit, and lubrication. Consult detailed specifications for your application.