|Stemless Casters for Steelcase &
Welded Stem Chair Bases
|Steelcase and some others,
build their chairs just the opposite of most chair manufacturers. Instead of
attaching the stem to the caster, they decided to attach the stem to the chair
and then designed a caster body to fit the stem on the chair. A normal caster
has the stem attached to the caster and then the caster assembly is inserted
into a hole in the base of the chair. The Steelcase Caster has a hole in the
top of the caster and the stem is welded to the chair. The caster is pressed
onto the welded stem and locks onto it. There are a few others that require
these welded stem casters.
There are many caster manufacturers in the
world. There is no standard on how to attach the caster stem to the caster
body. Each manufacturer does it differently. Therefore, the body from Caster
Company A will not fit the body of Caster Company B. This can present a problem
when trying to find a replacement should your caster break. Sometimes when a
caster breaks, it will break away from the stem. When this happens, it may
appear that the stem of the caster is permanently attached to the chair base.
You must look carefully to determine whether it is. If you can turn the stem
with pliers, it will come out. If it will not turn, you must look further. The
photo on the left below is one of those "gray" areas as to whether the caster
is truly a stemless caster or a broken "stem" caster. At first look, it appears
to be a stemless caster because it is "welded" to the chair and the stem does
not turn. Upon further inspection, you will notice that the stem is attached to
a "plate" which is welded to the chair. The caster is actually a standard plate
caster which was welded to the chair and therefore the stem was designed by
that manufacturer to only fit their body. Notice the shape of the stem. There
is an indentation in the stem towards the end. This indentation holds the
caster body to that manufacturer's stem. Most manufacturers use the same design
but not the same dimensions. Our caster will NOT fit on that stem.
at the photo on the far Right. This stem is welded directly to the chair. The
stem is straight and when measured, is 3/8" in diameter. The length is within
our specifications and is less than 1 5/16" in length. This stem was designed
to accept a stemless caster body.
To use our caster, you MUST be
positive that the welded stem on your chair is of the correct type and size.
This caster will ONLY work with the stems that we have explained
The diameter of the stem MUST be 3/8".
Nothing smaller will work. The length can not be greater than 1 5/16"
Look closely at the following photos and compare them
with your stem. If you are unsure, measure the stem and send us a photo of your
stem along with your measurements. We should be able to determine if this
caster will fit your chair base.
|This is a standard type of plate mounted caster
that was welded to the bottom of a chair. The only way to fix this is to grind
the welds off to remove the caster and then weld another plate type caster to
|This is the stem from the caster on the left.
Notice the indentation at the bottom of the stem. This is how a typical stem is
attached to a typical caster. The stemless caster will not work on this
|This is the correct type of stem for our stemless caster. The stem is 3/8" diameter and less than 1 5/16" long
If your leg looks like the photo on the RIGHT, you can choose from the 2 casters below. If it does not look like the photo on the RIGHT this product will NOT WORK for you. If you have any questions, please call us for assistance.
Soft Polyurethane Wheels