Product Description
Load wheel assembly suitable for electric pallet trucks and lift trucks, featuring a 3.25 inch outer diameter, 2.047 inch inner diameter, 2 inch tread width, and a polyurethane compound 306 with 97A Shore hardness. Greaseable bearing design for extended wear in heavy-duty applications.
Specifications: 3.250 inch diameter x 6.010 inch width (3.250" x 6.010" | 3.25 x 6.01 wheel | 3-1/4 x 6.01 | 82.55mm x 152.65mm)
Specifications
Material & Construction
| Tread Material | Polyurethane compound, designation 306 |
| Hub Material | Steel hub, greaseable bearings |
| Finish | Polyurethane tread bonded to steel hub |
Wheel Dimensions
| Material | Cushothane XL |
| Outside Diameter | 3.25 |
| Inside Diameter | 1.938 |
| Width Side to Side | 6.01 |
| Bore Depth | 0.584 |
| Hub Width | 6.01 |
| Bore Outside Diameter | 2.0467 |
Frequently Asked Questions
Q: What does greaseable bearing design mean on the SU S9812-A wheel?
A: The SU S9812-A includes sealed ball bearings with a zerk (grease) fitting. You inject lubricant through the zerk fitting every 250-500 operating hours, depending on duty. This replenishes the bearing lubrication film, prevents metal-to-metal contact, and extends bearing and wheel life significantly. The non-bearing version (SU S9812) relies on factory lubrication sealed at manufacture and cannot be re-lubricated after installation.
Q: How do I maintain the greaseable bearings on the SU S9812-A?
A: Use a hand grease gun with NLGI Grade 2 lithium-based grease (compatible with polyurethane). Every 250-500 hours, pump 2-3 shots into the zerk fitting until fresh grease appears at the bearing seal or hub edge. Do not overfill; excess grease generates heat and can degrade the seal. Keep the zerk fitting clean and accessible. Proper lubrication reduces rolling resistance, maintains wheel roundness, and prevents premature bearing wear.
Q: What is polyurethane compound 306 with 97A Shore hardness?
A: Polyurethane compound 306 at 97A Shore hardness is a mid-range durometer designed for balanced traction and wear resistance. Shore hardness measures rubber stiffness: 97A is harder than soft rubber but softer than rigid plastics, providing good grip on concrete while resisting deformation under load. This compound is suitable for general indoor material handling and offers better grip than softer polyurethane on smooth warehouse floors.
Q: Can I upgrade from non-bearing wheels to the SU S9812-A without modifications?
A: You can upgrade to the SU S9812-A if your truck has adequate axle clearance for the bearing hub. Most electric lift trucks and pallet jacks can accommodate this upgrade. Verify your axle bore diameter (should be 1.938 inches or compatible) and hub width (6.01 inches). If your current wheels are much smaller or have a different bore, contact us with your truck model and serial number to confirm compatibility before ordering.
Q: What is the load rating for the SU S9812-A wheel assembly?
A: Load capacity depends on your truck model and how the total load is distributed across all wheels. A typical 3,000-lb electric lift truck with 4 load wheels carries approximately 750 lbs per wheel. The greaseable bearing design does not increase load capacity; it extends service life and reliability. For your specific trucks load rating, contact us with the truck model and serial number.
Q: Is the SU S9812-A wheel suitable for wet or cold storage areas?
A: The SU S9812-A uses polyurethane compound 306 and is suitable for standard warehouse environments. The greaseable bearing resists moisture better than sealed bearings on non-bearing wheels, but the wheel compound is not formulated for wet floors or cold storage below 32 degrees Fahrenheit. For wet docks or freezer applications, request a wheel with high traction polyurethane compound designed for those conditions; greaseable bearings can be combined with cold-resistant or wet-surface treads.