Threaded Stem Casters for Furniture, Carts and Equipment
Service caster provides hundreds of options regarding threaded stems and threaded stem casters. The threaded stem is one of the most common stem types, and is used for everything from home and office to industrial applications.
Commonly Used Threaded Stem Casters
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Threaded Stem Caster Information
Threaded stems are used in two distinct ways. The first is to simply screw into a socket. The stem will thread into the socket as far as it can go, either until it hits the base of the stem or until it hits the end of the socket. The second method is to have the stem fit through a hole, such as in a plate, and then have a nut threaded on the other side to secure the stem. These two methods allow for great versatility in threaded stem casters, and allow threaded stems to be used on nearly any application.
Measuring a Threaded Stem
When replacing an existing threaded stem, there are three important measurements of which to note: Length, diameter, and thread pitch.
Length is measured from the shoulder (usually a hex nut shape) at the base of the threads, and is typically the least important measurement. The only way the length usually matters is if the stem needs to be long enough to fit through a hole and have a nut threaded on the other side to secure it. In threaded socket situations, short stems are not an issue.
Diameter is measured from one side of the stem to the other. If using a caliper or micrometer, do not let it fall between the threads as they are part of the diameter.
Thread pitch determines how course or fine the threads are. The only accurate way to determine thread pitch is to use a thread guage. Threading a nut, of a known size, can also determine thread pitch. Care must be taken regarding standard and metric sizes, as some will seem to fit properly, but are in fact incorrect.
A threaded stem measurement might look like this: 1/4" 20 x 2" , where 1/4" is diameter, 20 is thread pitch and 2" is length.