Locating Replacement Grease Seals for Old Calkins Trailer

Question:

Its an older trailer with 3/4inch bearings. Cant find the grease seals.

asked by: Don B

Expert Reply:

Given the Inside Diameter of the bearing you referenced, I'm guessing you have a LM11949 bearing. The LM11949 bearing has a .75 inch inner diameter, and is compatible with the LM11910 race. A grease seal will typically have an OD that matches that of the race and an ID that closely matches the diameter of the spindle where it rides. Assuming the spindle surface that the seal rides against is also .75 of an inch in diameter, the seal you need will have an ID of approximately .75 and an OD of about 1.781.

We don't offer any seals with an ID of .75, but it's certainly possible that the seal surface of the spindle is larger in diameter than the surface where the bearings ride. If you can get me a measurement of the spindle where the seal rides, I might have better luck in finding you a replacement. The best way to get an accurate measurement would be a caliper like # PTW80157 as a ruler or measuring tape wouldn't be accurate enough.

As you can see in the linked diagram, it's not uncommon for the spindle diameter where the seal rides to be different from that of the bearing surface.

expert reply by: Mike L