Caster; Swivel; 4" x1-1/4"; Thermoplastized Rubber (Gray); Hollow Kingpin (1/2" bolt); Nylon; Precision Ball Brng; 275#; Total Lock; Thread guards (MedCaster NG04QDP125TLHKU1)
Wheel Diameter: 4"Tread Width: 1-1/4"Material: Thermoplastized Rubber (Gray)Load Rating (Per Item): 275 poundsFinish: Nylon (Gray)Connector Details: Hollow Kingpin (1/2" bolt hole)Bearing: Precision Ball BrngTotal Lock (Trailing)Misc Options: Thread guardsSwivel Locks: Total Lock (Trailing)Load Height: 5-7/16"Swivel Radius: 4-7/16"Shipping Weight: 3 lbs.Usually Ships in: 7-10 days (may be affected by quantity ordered)
Hollow Kingpin casters are often shipped unassembled to allow the customer to insert their connecting bolt before the wheel is installed and in the way.
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.