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Thread: Zd30 belt tension bearing numbers

  1. #1
    Patrol God BigRAWesty's Avatar
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    Zd30 belt tension bearing numbers

    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..
    Cheers
    Kallen Westbrook

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    The master farter
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    Quote Originally Posted by bigguwesty View Post
    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)

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    BigRAWesty (12th December 2016)

  5. #3
    Patrol God BigRAWesty's Avatar
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    Quote Originally Posted by mudski View Post
    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..
    Cheers
    Kallen Westbrook

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    Patrol God Sir Roofy's Avatar
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    Quote Originally Posted by bigguwesty View Post
    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

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    BigRAWesty (12th December 2016)

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    Missing in Action VK2FMIA's Avatar
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    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.
    "Yet, upon the whole, the space I traversed is unlikely to become the haunt of civilized man....." - Charles Sturt

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    Patrol God threedogs's Avatar
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    I have these numbers I got from Roofy NTN-WC 87503
    04 ST 3lt auto, not enough Mods to keep me happy, but getting there

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    BigRAWesty (13th December 2016)

  11. #7
    The master farter
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    Quote Originally Posted by VK2FMIA View Post
    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.

  12. #8
    Patrol God BigRAWesty's Avatar
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    Quote Originally Posted by mudski View Post
    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.
    Cheers
    Kallen Westbrook

  13. #9
    The master farter
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    Quote Originally Posted by bigguwesty View Post
    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.

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    BigRAWesty (13th December 2016)

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