CAT NOS 6F1945 D8 rod bearings

[CAT RD-7]

I bought some NOS 6F1945 rod bearings, and some are in boxes and some are in wax without a box. In 2 of the boxes, they are marked upper and lower in ink, but I really can't tell any difference between them. In one of the boxes, they are not marked upper or lower. I never removed the wax from the other bearings. On 1 of the waxed bearings, there is a tag on the back and it doesn't say upper or lower on it. What's suppose to be the difference. Is there a way to tell. Does it make a difference if they get reversed at all by accident? Does anyone know? They should have had that stuff stamped in the back of them.

[Old Magnet]

The 6F1945 bearings come in sets of two (upper & lower) that should be identical halves. Be on the look out for bottom shells that may have a slightly elongated dowel hole to assist with overall alignment.

[SJ]

OM, your right on as that is the difference with them is the dowel hole in the one and it does go to the bottom where the dowel is located.

[CAT RD-7]

Thanks guys, you are right. I measured them with my caliper and the one half has a slighter elongated hole and I guess that's the lower one the way it sounds. I cut the wax loose on the other individidual baerings and I see that I have a few more uppers than lowers. Can I take a die grinder or a file and slightly elongate the hole so I can use them on the bottom?

[SJ]

I never heard of it being done but I cannot see why it shouldn,t work if you do it right.