Vortech MP40 bearings

[Nick Rose]

My MP40 started to make chirping noises. I know the bearings I need are 698ZZ and 697ZZ but the websites have many of each and I don't know which one to pick. Do I go for one of the more expensive ones or go for the cheaper priced ones?

https://www.bocabearings.com/search...thod=and&view=list&cnt=12&af=&isort=price rev

https://www.bocabearings.com/search...thod=and&view=list&cnt=12&af=&isort=price rev

 

[redfishbluefish]

You have asked the million dollar question!

If you lo0k at ABEC numbers, you would think the highest would be the best....ceramic bearings.....not....or maybe....or who knows.

I spent many days looking at all the bearing data and can offer you nothing. Some had great success with the least expensive bearing, while others found the high priced bearing problematic. So who knows.

My advice...since you're about to become an expert in bearing replacement on a Vortech, simply pick one bearing type and go for it. If it doesn't work out, since you're now an expert, change it out to something else.

When I did my bearing replacements, the bearings I picked, at first, made a little noise, but eventually calmed down and quieted down.

HERE's my experience on doing a bearing replacement. Hope this helps.

 

[Ross B Reef'n]

McMaster Carr is your Walgreens of the internet for odds and ends of the hard to find hardware and materials. They only sell the best, but you pay the convenience fee.

 

[Nick Rose]

Here is another question. I just took off the bearings (Which was easy) to get a look at the numbers and saw they are different then the ones I have seen on other threads and videos. One is R-1980KK which I do see is the same as 698ZZ but the other is 607Z. Is the 607Z the same as 697ZZ?

 

[Ross B Reef'n]

A veneer caliper is going to be your best friend in measuring what you have. Then, besides the numbers, you can just match the dimensions. If you post a picture of both sides of the bearings, I could help you with bearing type.

 

[madweazl]

Here is another question. I just took off the bearings (Which was easy) to get a look at the numbers and saw they are different then the ones I have seen on other threads and videos. One is R-1980KK which I do see is the same as 698ZZ but the other is 607Z. Is the 607Z the same as 697ZZ?

607-Z?

 

[redfishbluefish]

Z means it's a shielded bearing. Now for the confusion...Z means shield on one side, ZZ means shields on both sides.....and now for the confusion, most bearings labeled as just Z are shielded on both sides.

 

[Nick Rose]

A veneer caliper is going to be your best friend in measuring what you have. Then, besides the numbers, you can just match the dimensions. If you post a picture of both sides of the bearings, I could help you with bearing type.

 

[redfishbluefish]

..........Is the 607Z the same as 697ZZ?

NO! The 607 is 7 x 19 x 6 mm, while the 697 is 7 x 19 x 5.

I'd suggest checking out Boca Bearing....they have every small bearing known to man.

 

[madweazl]

NO! The 607 is 7 x 19 x 6 mm, while the 697 is 7 x 19 x 5.

I'd suggest checking out Boca Bearing....they have every small bearing known to man.

Or just stick with NMB which is the largest bearing manufacturer.

 

[Ross B Reef'n]

Just a shielded bearing. Go to Mcmaster.com and search for 5972K261

I'd still measure the OD, ID, and width to be sure they match up.

 

[madweazl]

Avid carries a bunch of bearings that are dirt cheap as well. I cant imagine the rubber [sealed] wouldnt be fine for this application.

 

[Nick Rose]

Well I ordered the bearings from MacMaster on the evening of the 3rd and got the parts the next day. One of the bearing went on with in seconds the other one took some hammering. The overall process was quiet simple. To take off the bearings I used a socket and a flat washer which I cut a section off so it would fit around the shaft and used a hammer.

 

[redfishbluefish]

Now the big question....Is it going to be quiet?

My replacements took maybe a week to quiet down, so don't be discouraged if they are slightly noisy on startup. They have to find their happy place.

 

[madweazl]

Well I ordered the bearings from MacMaster on the evening of the 3rd and got the parts the next day. One of the bearing went on with in seconds the other one took some hammering. The overall process was quiet simple. To take off the bearings I used a socket and a flat washer which I cut a section off so it would fit around the shaft and used a hammer.

Post which items you used as well.

 

[Ross B Reef'n]

That's great to hear! I've been using McMaster for years, and they have always have been reliable.

 

[Nick Rose]

Now the big question....Is it going to be quiet?

My replacements took maybe a week to quiet down, so don't be discouraged if they are slightly noisy on startup. They have to find their happy place.

Its actually not that much louder then the other MP40.

 

[Nick Rose]

Post which items you used as well.

The parts I used was: 607-2Z and 698-2Z

https://www.mcmaster.com/5972k261
https://www.mcmaster.com/6153k22

 

[madweazl]

The parts I used was: 607-2Z and 698-2Z

https://www.mcmaster.com/5972k261
https://www.mcmaster.com/6153k22

Was this a QD dry side or are they the same?

 

[Nick Rose]

This was not a quiet drive. Don’t know when my dad bought these but they must be 7 years or older.