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Thread: Rear brake rewind tool thread pitch

  1. #1
    Regular Member Ste's Avatar
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    Vehicle : Jaguar XF 3.0D V6

    Trim : Black

    Engine : 3.0D V6

    Year : 0000

    Default Rear brake rewind tool thread pitch

    Can anyone help me out with the answer to the question that has been preventing me making a new rewind tool

    All I need to know is the threads per inch on the main 'bolt' of the tool. I want to get the correct ratio of rotation to distance pushed in.


    Thanks

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    I have a sealey rewind set and the thread is M16x2, works out at 12.7 tpi. Don't think the pitch is that critical though. HTH

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    Regular Member myelite150's Avatar
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    Quote Originally Posted by tridley View Post
    I have a sealey rewind set and the thread is M16x2, works out at 12.7 tpi. Don't think the pitch is that critical though. HTH
    i agree fully as if the piston does get away from the rewind tool all you have to do is re tighten the sleeve that helps rest againt the caliper

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    Have you made one of these tools yet mate? any pics

  5. #5
    Regular Member Ste's Avatar
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    Vehicle : Jaguar XF 3.0D V6

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    I would have thought that the pitch is critical, as the amount of piston inward movement per rotation is important as to not damage the internal thread, or to not have to constantly reset the tool.


    I will be making a tool pretty soon to replace my original 'low tech' jobbie.

    Once I do I will take pics / draw it if anyone wants to know how to make one themselves. I can't bring myself to buy a tool which will only get used a couple of times, but 10 mins with the welder seems ok to me. £20 is 40 bricks....
    Last edited by Ste; 24th February 2010 at 10:21.

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    I thought like you that the disc would always stay in contact with the caliper piston when rewinding. However, there are times when rewinding that a gap appears and the slack has to be taken up by winding out the tool. HTH

  7. #7
    Regular Member Ste's Avatar
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    Vehicle : Jaguar XF 3.0D V6

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    To me that sounds like the pitch of the tool doesn't match exactly with the pitch of the caliper piston adjuster. But if it works, then maybe it doesn't need to.

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    Not sure how the internal mechanism works but the set I have has sixteen adaptors and I would be surprised if all those makes of car have exactly the same pitch inside the caliper.

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    Quote Originally Posted by tridley View Post
    Not sure how the internal mechanism works but the set I have has sixteen adaptors and I would be surprised if all those makes of car have exactly the same pitch inside the caliper.

    Thats why none of the tools have the correct pitched thread, otherwise a new tool would be required for each caliper type.

    I don't think it really makes any difference, it just means retightening the sleeve of the tool maybe once during the process.

  10. #10
    Regular Member myelite150's Avatar
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    Quote Originally Posted by eaglepva View Post
    Have you made one of these tools yet mate? any pics
    i made one and got pics too

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