Product Description
Bearing DE
Frequently Asked Questions
Q: What does the DE designation mean for the TN 46390 bearing?
A: DE stands for Double Ended or Sealed on Both Ends. The TN 46390 bearing features seals on both sides to protect internal rolling elements from contamination, moisture, and dirt. This design extends bearing life in warehouse, cold storage, and damp environments common in material handling.
Q: What manual pallet jack applications use the TN 46390 bearing?
A: The TN 46390 double-sealed bearing is used in critical pivot points, pump assemblies, and mast column rotation mechanisms in manual pallet jacks from Crown, Toyota, Raymond, Yale, and similar brands. It is especially suited for wet environments and cold storage applications where seal integrity is essential.
Q: Is the TN 46390 pre-lubricated or does it require greasing?
A: The TN 46390 is pre-lubricated at manufacturing and sealed to retain grease. Double-sealed bearings are designed as maintenance-free components and should not be regreased unless your equipment documentation specifically indicates relubrication is needed. Attempting to force additional grease may damage the seals.
Q: How do I know if the TN 46390 bearing needs replacement?
A: Replace the bearing if you observe grinding or squeaking sounds, visible play or movement in connected components, increased resistance in rotation, or corrosion on outer bearing surfaces. Double-sealed bearings losing their seals or showing internal contamination require immediate replacement to prevent catastrophic failure.
Q: What is the expected lifespan of the TN 46390 double-sealed bearing?
A: With normal use and proper maintenance, the TN 46390 bearing lasts 4 to 10 years. Sealed construction protects bearings in high-moisture environments and extends lifespan compared to open bearings. Cold storage and wet floor applications may require bearing replacement at the earlier end of this range due to thermal cycling.
