JT PT2748MD-79

Frequently Asked Questions

Q: What bearing size is the JT PT2748MD-79 and what models does it fit?
A: The JT PT2748MD-79 is a 20MM bearing with rubber shield construction. It is designed as a direct replacement bearing for Jet model 6600 manual pallet jacks. Verify your equipment model matches before ordering to ensure proper fitment.

Q: What is the rubber shield on this bearing designed to do?
A: The rubber shield seals the bearing from external contamination including dust, moisture, and debris. This shields the rolling elements and raceway surfaces from harsh warehouse conditions and extends bearing life in material handling equipment applications.

Q: What are common failure symptoms that indicate this bearing needs replacement?
A: Typical failure indicators include grinding or squealing noises during load wheel rotation, excessive play or wobbling in the load wheels, increased friction that requires more effort to pump the jack, and visible rust or corrosion on the bearing housing. Any of these symptoms suggests the bearing seal has failed and replacement is needed.

Q: How often should this bearing be replaced under normal warehouse use?
A: Bearing lifespan depends on load conditions and maintenance practices. In standard material handling applications with regular use, expect bearing life of 2 to 4 years. Heavy-duty or wet environment use may reduce lifespan. Regular inspection for play and noise will indicate when replacement is due.

Q: Are there cross-reference part numbers for the JT PT2748MD-79?
A: The JT PT2748MD-79 is the OEM part number. Verify compatibility using your Jet model 6600 documentation. Use only exact OEM specifications to ensure load wheel bearing function and load capacity meet manufacturer standards.