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OEM chooses STANDARD seals and bearings as they are the least expensive. There are applications where an upgrade to a SPECIL seal r bearing are required and the EXTRA cost is justified. Anyone repairing old machinery should have a seal catalog and a bearing catalog for reference. Mine were free as they were prior year versions. Online cross reference will give the standard seal number. Catalog will give more choices that might be better… such as a thinner or thicker seal to alter location lip meets shaft, Extra features … stainless steel shells, springs and lip material options are always extra cost . but, sometimes worth consideration. Look up seals by shaft diameter, then seal diameter and then thickness. Catalog contains lots of things you do not need to know, but, finding the things you need to know is quick and easy.
Louis Doering
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