Need MP40 Bearings

vtecintegra · Jan 14, 2022

A year ago I replaced my MP40, nonQD, bearings with these.

Boca Bearing: MR607-2RU TH9/C3 PS2
Boca Bearing: MR698-2RU TH9/C3 PS2

They were quiet enough for a year, but the pumps are getting noisy again. The bearings aren't that expensive, but changing them every 12 months would be a pain. Any recommendations? Boca Bearings list multiple pages in the right size.

outhouse · Jan 14, 2022

I tried some quality bearings and they screamed like old bearings. So I quit trying to replace. You need to find a very high quality bearing SFK best bearings sucked.

Sean Clark · Jan 14, 2022

vtecintegra said:
A year ago I replaced my MP40, nonQD, bearings with these.

Boca Bearing: MR607-2RU TH9/C3 PS2
Boca Bearing: MR698-2RU TH9/C3 PS2

They were quiet enough for a year, but the pumps are getting noisy again. The bearings aren't that expensive, but changing them every 12 months would be a pain. Any recommendations? Boca Bearings list multiple pages in the right size.

I used this line of bearings on my MP10s and they seem to stay quiet for me. I am sure you can get them in MP40 sizes.

vtecintegra · Jan 17, 2022

Thanks. I learned something. The bearings I'm using are AEBC rated 1, the lowest on tolerances. Ordered 5, like the ones in the link. Will see how this works.

Sean Clark · Jan 17, 2022

Yeah, all of the specs get lost on me. So many numbers. Sometimes you want a high number while other times you want a low number. Let us know how they turn out.