This is the MAIN ARMATURE BEARING for SA-200. Fits most Red Face and Short Hood welders and some Black Face welders. There are two different bearings that were used and this is the larger of the two.
The Outside Diameter of this Bearing is approximately 3.54 inches (a little under 3 9/16 inches).
If your bearing is smaller then check out the 6208 bearings.
Please call with any questions 602-850-7399.