4 Inch Red PU Double Ball Bearings With Double Brake 6 Holes Plate Caster - Easy Assembling For Equipment

Breakdown of the Description

(1) 4 Inch: This refers to the diameter of the wheel. 4 inches is a standard medium-duty size that offers a good balance between maneuverability and load capacity.

(2) Red PU (Polyurethane): This is the material of the wheel tread.

    Properties: Polyurethane is popular because it combines the hardness of plastic with a degree of shock absorption. It is non-marking (won't leave black marks on floors like rubber can), resistant to oils and chemicals, and offers low rolling resistance.

(3) Color: The red color often indicates a specific hardness or brand line, but generally, it helps identify the wheel as polyurethane.

(4) Double Ball Bearings: This describes the raceway inside the swivel head (the part that allows the wheel to rotate 360 degrees) or the wheel hub.

    Benefit: "Double ball bearings" means the swivel moves very smoothly and can handle heavier loads without seizing up compared to single-bearing or plain-bearing casters.

(5) Double Brake: This is a key feature. It typically means the caster has a mechanism that can simultaneously lock both the wheel from rolling and the swivel from turning. This is often achieved with a single pedal or lever.

(6) 6 Holes Plate: This describes the top plate used to mount the caster to the equipment (like a cart or rack).

    Configuration: Instead of the standard 4-hole pattern, this has 6 holes. This is often used for heavy-duty applications or as a replacement for specific OEM (Original Equipment Manufacturer) parts to ensure a more secure bolt-down.

Typical Applications