[slow-poke]

I'm looking for another matched pair of angular contact bearings.

I was able to find a pair of matched NSK's and they allowed me to get the total error on the X axis of my mill down to 0.0003", and I'm happy with that goal was < 0.001"

Now I need another set for another axis and found these old stock on ebay. They appear to be a matched set (same box), but I'm not sure they might just be two unmatched. I asked the seller and he has no clue. I tried to find details online but no luck.

Does anyone have any insight?

https://www.ebay.ca/itm/296398607476

[joeavaerage]

Hi,
I suspect they are matched, but I suspect not universally. The part number concluded DUL which I think means Face-Face. Universally matched bearings can be used DF, DB or DT.

Craig

[slow-poke]

Thanks for that, I found another pair, that are matched for sure. Basically the same as what I used previously, except the cage type (Y vs. R)
On order.


https://www.ebay.ca/itm/385567495647...Bk9SR9ab_O_0Yw

[jason003]

I think you need to determine what the contact angle is. NSK has 3 types, 15, 25, and 30 degrees. Here are detailed dimensions for these three types of bearing, and they are all universal matching bearing.
https://www.coolenbearings.com/nsk/s.../7001ctynsulp4 7001CTYNSULP4 15 degrees
https://www.coolenbearings.com/nsk/s...7001a5tynsulp4 7001A5TYNSULP4 25 degrees
https://www.coolenbearings.com/nsk/s.../7001atynsulp4 7001ATYNSULP4 30 degrees