There are a wide variety of caster mounting options available. Let’s take a closer look at the most common.
Top plates are characterized by a flat mounting surface, most commonly square or rectangular. Pre-drilled bolt holes allow for easy attachment. Top plates can also be welded directly to the object or secured using quick release caster pads.
Threaded stems come in many diameters, lengths and pitches. They are available in standard, metric and pipe thread configurations. Threaded stems are often a good choice when there is limited space that prevents a top plate from being used.
Grip ring stems feature a small friction ring. They are commonly found on mop bucket casters and office chair casters.
Grip neck stems are typically used with a plastic or metal socket. They are commonly used when attaching casters to wooden furniture or for DIY projects
Round stems fit into a round tube. They are heavy-duty stems that are often used on outdoor construction equipment, like scaffolding.
Square stems are similar in function to round stems, however, they fit into square tubes.
Expanding adapter stems are designed for use in hollow tubing. They feature threaded stems that are fitted with an expanding adapter assembly. By rotating the caster raceway, the assembly expands to fit snugly in the tubing.
Also known as “hollow kingpin” or “hole-in-head”, this is a stemless design with a hole on the top of the mounting surface. The mounting surface is positioned against the object, after which a fastener like a screw or bolt is driven through the hole and into the object.
