Product Description
The Big Joe BJ 78409-A is a premium load wheel assembly designed for electric pallet trucks in the Millennium Series. It features a durable 4-inch polyurethane tread and precision needle bearings for smooth, low-friction operation. The machined steel core with 20mm bore provides reliable load support and extended service life. Direct replacement for BJ 78409, 78409, and 078409.
Specifications
Material & Construction
| Core Material | Machined steel core |
| Tread Material | Polyurethane |
| Tread Diameter | 4 inches |
| Bearing Type | Precision needle bearings |
| Bore Size | 20 mm |
Part Numbers
| Primary Part Number | BJ 78409-A |
| Manufacturer Part Number | BJ78409 |
| Alternate Part Numbers | 78409, 078409 |
Compatibility
| Equipment Compatibility | Big Joe Millennium Series electric pallet trucks |
Frequently Asked Questions
Q: What is the bore diameter and hub specification for the BJ 78409-A load wheel?
A: The BJ 78409-A features a 20 mm bore with a machined steel core. This bore size is standard for Big Joe Millennium Series electric pallet trucks. The hub is precision machined steel designed to accommodate precision needle bearings for smooth rotation and load support.
Q: How is the BJ 78409-A related to the BJ 78409, and are they interchangeable?
A: The BJ 78409-A is equivalent to the BJ 78409, with cross-references including 78409, 078409, and BJ78409. Both are designed for Big Joe Millennium Series equipment. Both feature the same 4 inch polyurethane tread. Confirm bore diameter and hub construction match your truck before selecting between them.
Q: What bearing type does the BJ 78409-A use and why is this important?
A: The BJ 78409-A is equipped with precision needle bearings. Needle bearings provide low-friction rotation, reduce vibration, and distribute load evenly across the bore. This design extends load wheel life and reduces steering effort on electric pallet trucks compared to cheaper bearing types.
Q: Is the BJ 78409-A suitable for wet floor or cold storage applications?
A: The BJ 78409-A features a polyurethane tread that performs well on dry concrete and smooth warehouse floors. For wet floor conditions or cold storage where traction is critical, a high-traction or specialty compound wheel may be more appropriate. Standard polyurethane can become slippery when wet or in freezing conditions.
Q: What maintenance does the BJ 78409-A load wheel require?
A: Inspect the wheel regularly for flat spots, cracking, or uneven wear. Check needle bearings for smooth rotation and listen for grinding or noise during operation. Clean debris from the hub and bearing surfaces. Replace the wheel if the tread wears unevenly, the hub becomes damaged, or bearings fail. Proper maintenance extends wheel life to 2 to 5 years in normal conditions.
Q: What is the weight capacity and load rating for the BJ 78409-A?
A: The BJ 78409-A is designed to support the full load capacity of Big Joe Millennium Series electric pallet trucks. Exact load rating depends on the truck model and the number of wheels. Refer to your equipment documentation for maximum load capacity. Do not exceed the trucks rated capacity as this will damage the wheel and bearing.