Zd30 belt tension bearing numbers

[BigRAWesty]

Ok guys seems it's hard to find numbers..
Dedicated thread..
Post the bearing and number and how long it lasts.

NTN-WC 87503
15***km . s far and no issues..

Skf 6203 DU
Ebay bearing. Currently untested awaiting failure of the ntn..

[mudski]

Ok guys seems it's hard to find numbers..
Dedicated thread..
Post the bearing and number and how long it lasts.

NTN-WC 87503
15***km . s far and no issues..

Skf 6203 DU
Ebay bearing. Currently untested awaiting failure of the ntn..

Just to let everyone know of the dimensions of these bearings as I went through all this many moons ago. The OEM bearing you cannot get. So here are the closest bearings I found...
For some reason I dont have the thickness of the OEM bearing written down. The ID and OD are correct, From memory it was 15mm. and it was a double row high speed bearing. In my opinion the 6203-2RS would last the least.

These were all for a direct Injection pulley, bot sure if the CRD bearing is the same or not...

6203-2RS 17 x 40 x 12 single row ball bearing.
WC85703 17 x 40 x 14.3 Single row bearing
LR5003-2RS 17 x 40 x 14 Double row ball bearing
62203-2RS 17 x 40 x 16 Single row ( I think) ball bearing.

Numbers obtained from the OEM bearing...

BRS NBR+FE ( on the outer race)
005-110-564 / 396 J0207 (on the inner race)

[BigRAWesty]

Just to let everyone know of the dimensions of these bearings as I went through all this many moons ago. The OEM bearing you cannot get. So here are the closest bearings I found...
For some reason I dont have the thickness of the OEM bearing written down. The ID and OD are correct, From memory it was 15mm. and it was a double row high speed bearing. In my opinion the 6203-2RS would last the least.

These were all for a direct Injection pulley, bot sure if the CRD bearing is the same or not...

6203-2RS 17 x 40 x 12 single row ball bearing.
WC85703 17 x 40 x 14.3 Single row bearing
LR5003-2RS 17 x 40 x 14 Double row ball bearing
62203-2RS 17 x 40 x 16 Single row ( I think) ball bearing.

Numbers obtained from the OEM bearing...

BRS NBR+FE ( on the outer race)
005-110-564 / 396 J0207 (on the inner race)


Got the same numbers off the ome bearing but after both places here couldn't find it I didn't bother posting it lol..
I'm going back to them now with what I have to see if anyone does a high speed bearing as I think this is one of the let downs. The seals can't handle the speeds and then let crap in..

[Sir Roofy]

ok guys seems it's hard to find numbers..
Dedicated thread..
Post the bearing and number and how long it lasts.

Ntn-wc 87503
15***km . S far and no issues..
Skf 6203 du
ebay bearing. Currently untested awaiting failure of the ntn..

ntn maybe 2o000
ebay one coming up 12000 waiting for it to go

[VK2FMIA]

Replaced mine with a JAF 87503

10,000 km & still ok. Had LM-SA written in marker under the number, no idea what it means. From memory it was only 12mm wide.

Haven`t got a set of calipers but the original bearing is 14mm thick according to the tape measure.

[threedogs]

I have these numbers I got from Roofy NTN-WC 87503

[mudski]

Replaced mine with a JAF 87503

10,000 km & still ok. Had LM-SA written in marker under the number, no idea what it means. From memory it was only 12mm wide.

Haven`t got a set of calipers but the original bearing is 14mm thick according to the tape measure.

My concern using a narrower 12mm bearing is it wont take the load as well as the 14mm wide bearing. Not to mention speed.

[BigRAWesty]

My concern using a narrower 12mm bearing is it wont take the load as well as the 14mm wide bearing. Not to mention speed.
Well that's not entirely true..
Lots of things contribute to speed handling other than just width..
Cage material and seal design have more of an impact.

[mudski]

Well that's not entirely true..
Lots of things contribute to speed handling other than just width..
Cage material and seal design have more of an impact.

Yeah correct, but a wider bearing uses larger ball bearings, if in single row formation, or two smaller ball bearing in double row formation, giving more surface area contact, which equates to high load and speed capabilities. Thats why roller bearings are using in wheel bearing applications. More surface contact. Cage material and seal design is an option for many ball type bearings aswell. The plain old 6203 comes in a few variants, depending on the use its intended for. 2RS on the end of the number is basically an abbreviation for 2 rubber seals. Which then can be had with different seal material.

So I'd still use a wider bearing, closer to what was the OEM size rather than a narrower bearing.