Product Description
BEARING assembly (SINGLE SHIELD)
Frequently Asked Questions
Q: What does single shield protection mean on the 4253904 bearing?
A: A single shield bearing has one metal or rubber-lined cover protecting the bearing races from contamination. The 4253904 single shield design provides effective dust and dirt exclusion for typical warehouse environments while allowing easier maintenance access compared to sealed bearings. This design is ideal for dry indoor storage and regular-use pallet jacks.
Q: What equipment models use the 4253904 bearing assembly?
A: The 4253904 is a load wheel or foot roller bearing used in manual pallet jacks from Crown, Toyota, Raymond, Yale, Hyster, Clark, Mitsubishi, and CAT. It is suitable for both standard and low-profile jack models. Confirm compatibility by matching bore and outer diameter with your current bearing.
Q: When should I use a single shield bearing versus a sealed bearing?
A: Use single shield bearings like the 4253904 in clean, dry warehouse and indoor storage environments. Single shield bearings are more cost-effective and easier to service. Switch to sealed bearings if your pallet jacks operate outdoors, in wet areas, freezers, or other harsh environments where moisture and contamination are concerns.
Q: What is the expected lifespan of this bearing?
A: Under normal warehouse operating conditions, the 4253904 bearing typically lasts 2 to 3 years. Lifespan depends on load volume, floor cleanliness, and maintenance. Bearings in high-traffic environments or on unclean floors will fail faster than those in controlled, clean settings.
