Caster; Swivel; 4" x 1"; Thermoplastized Rubber (Gray); Threaded Stem (1/2"-13TPI x 1-1/2"); Zinc; Plain bore; 125# (Trio Pines 3640-21-MIR)
Wheel Diameter: 4"Tread Width: 1"Material: Thermoplastized Rubber (Gray)Load Rating (Per Item): 140 poundsFinish: ZincConnector Details: Threaded Stem (1/2"-13TPI x 1-1/2")Bearing: Plain boreLoad Height: 4-3/4"Swivel Radius: 3-1/8"Shipping Weight: 1.21 lbs.Usually Ships in: 1-2 weeks (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.