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help identify Bosch ZEV armature

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  • help identify Bosch ZEV armature

    Good evening,
    I have a Bosch ZEV 45 deg parts mag I am wanting to make functional and the armature is missing the collector ring and front bearing. I am wondering if this armature is for sure ZEV before I continue. There are threads in front of the collector ring, but I do not see a nut in the Bosch ZEV parts list and cant find pictures of ZEV armatures that do not have a collector ring on them to know what it looks like.
    This armature is marked 45 deg.

    I am probably going to make some parts for this to keep its cost down. I do not have an interrupter housing and I know it needs to be made of brass and not sure why those are not aluminum. I do know why the are not iron to not interfere with magnetic field.

    I need to replace the points and points base because it is for CCW and I need CW.

    I apologize if this topic has been covered, I tried a search and have not found the specific question of armature ID.
    Please let me know what you know.
    Thank you,
    Scooter

    Bosch armature 1.jpg

  • #2
    You should find the following thread useful:

    https://www.britbike.com/forums/ubbt...mature-magneto

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    • #3
      p.s. I have a ready-for-total-restoration Bosch ZEV that's surplus to my anticipated needs. Although I rarely sell anything (because, I never know what I might need), if you need it, make me an offer I can't refuse.

      BoschZEV.jpg

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      • #4
        Good evening,
        Thank you for the reply and thank you for offering magneto. At this time I cant bring myself to commit because mine is going on a Excelsior engine that seems to be taking financial precedence. I will probably make parts or move on to the Midco mag that came with the engine. I have not taken it apart yet.
        Thank you for the detailed article, I read it the other day, but still did not see picture of the threaded part of the front of armature to see what a nut looks like. Collector rings I have seen do not look like they have a recess for a nut and it looks like the bearing is directly in front of it.
        I am wondering about a source for the front bearing? That is something I cant make.
        Thank you,
        Scooter

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        • #5
          Originally posted by Scooter6 View Post
          Good evening,but still did not see picture of the threaded part of the front of armature to see what a nut looks like.
          Sorry, I didn't realize I hadn't posted a photograph on that site of the ZEV armature with the slip ring removed. The shaft under the slip ring is a cylinder, not threaded. The armature you have isn't from a ZEV.

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          • #6
            Thank you for letting me know about the armature. That just continues to be my luck with project Excelsior engine. Sounds like I need to consider your mag. I will PM you with a couple questions.

            Any idea what model this armature is from? I figured it was ZEV since it is marked 45 deg.
            Thank you,
            Scooter
            Last edited by Scooter6; 06-22-2025, 06:27 PM.

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