Caster; Swivel; 4" x 2"; Round ThermoPlstc Rbr; Plate; 4"x4-1/2"; holes: 2-5/8"x3-5/8" (slotted to 3"x3"); 3/8" bolt; Zinc; Roller Brng 300# (Shepherd CPS40156TZ-TPD81(GG))
Wheel Diameter: 4"Tread Width: 2"Material: ThermoPlastic Rubber Donut (Gray)Load Rating (Per Item): 300 poundsFinish: ZincConnector Details: Plate (4"x4-1/2"; holes: 2-5/8"x3-5/8" slots to 3"x3"; 3/8" bolt)Bearing: Roller BrngLoad Height: 5-5/8"Swivel Radius: 3-9/16"Shipping Weight: 5 lbs.Usually Ships in: 24 hours (may be affected by quantity ordered)
Thermoplastic Rubber (TPR) wheels are precision molded and mechanically locked to a durable polyolefin core to provide an economical wheel for many applications. They provide a smooth, cushioned ride and can overcome small debris and obstacles on the floor. They offer floor protection, are non-marking and non-conductive. These often have various brand names by various manufacturers and can be flat or crowned.
TPR are considered soft wheels which may experience flat-spotting even when loaded within the acceptable weight limits. Flat-spotting is more noticeable in warmer weather. The flat-spotting will roll-out and dissipate after a few minutes of rolling, depending on the size of the standing load and extent of the flat-spotting. This is a normal occurrence of these wheels and is not a product failure. If your application cannot tolerate this temporary condition, another material type may be preferable.