Product Description
SU 621 Load Wheel by Liftsplus.com is constructed from molded nylon polymer with sealed 20 mm precision bearing, diameter 3.00 inches by width 3.66 inches, engineered for use in electric lift trucks and pallet jacks. Functions as a load bearing and support wheel; includes no available cross-reference part numbers.
Specifications: 3.250 inch diameter x 4.190 inch width (3.250" x 4.190" | 3.25 x 4.19 wheel | 3-1/4 x 4.19 | 82.55mm x 106.43mm)
Specifications
Material & Construction
| Wheel Material | Nylon polymer |
Part Numbers & Compatibility
| Manufacturer Part Number | SU 621 |
Wheel Dimensions
| Material | Cushothane XL |
| Outside Diameter | 3.25 |
| Inside Diameter | 1.875 |
| Width Side to Side | 4.19 |
| Bore Depth | 1.18 |
| Hub Width | 4.19 |
| Bore Outside Diameter | 2.0467 |
Frequently Asked Questions
Q: What are the exact dimensions of the SU 621 load wheel?
A: The SU 621 is 3.25 inches in outside diameter and 4.19 inches in width. The bore is 1.875 inches inside diameter with a 2.0467 inch bore outside diameter. The precision bearing is 20 mm. These dimensions are equivalent to 82.55 mm diameter and 106.43 mm width in metric.
Q: Is the SU 621 wheel material nylon, polyurethane, or something else?
A: The SU 621 is constructed from molded nylon polymer with a sealed 20 mm precision bearing. It is lighter than polyurethane and suitable for standard warehouse load applications. Do not use nylon wheels on very hot floors or in high-temperature areas above 120 degrees Fahrenheit, as nylon can soften and deform.
Q: Can the SU 621 be upgraded to the SU 621-XL polyurethane model?
A: Yes. The SU 621-XL is the polyurethane upgrade to the SU 621 nylon wheel. Both have the same overall dimensions and bore size, so the SU 621-XL fits the same hub. Upgrade to SU 621-XL if you need better durability or thermal resistance. No hub modification is required.
Q: What does a sealed 20 mm precision bearing mean, and do I need to grease it?
A: A sealed precision bearing is pre-greased and designed not to require additional lubrication under normal use. The seal keeps contaminants out. Do not force grease into the bearing, as this can damage the seal and cause bearing failure. If the wheel becomes difficult to spin, the bearing may be damaged and the wheel assembly should be replaced.
Q: What is the maximum load capacity of the SU 621 wheel?
A: Load capacity depends on the number of wheels on your truck and the hub design. The SU 621 nylon wheel is rated for standard warehouse pallet jack and electric lift truck duty in the 3000 to 6000 pound total truck capacity range. Do not exceed your truck manufacturers maximum load rating. Overloading can flatten the wheel and bind the bearing.