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  1. #1
    Join Date
    Dec 2014
    Location
    Tasmania
    Posts
    83

    Default Hercus 9" A model headstock belt

    Gday,

    Wondering if anyone can confirm which length of belt I need for the headstock pulley on my horizontal drive model A?

    I noticed that the motor kind of bobs up and down as the machine runs and for a while couldn't work out how this was possible and then it occurred to me that the headstock belt must be stretched or whatever, because it would appear to be the culprit and it brings the floating rear pulley/motor assembly in and out as it runs.

    I can see AMH website does list a few belts but none that are specifically for the horizontal belt setup, or at least that I could see.

    Cheers,
    ratters

  2. #2
    Join Date
    Jan 2010
    Location
    Perth
    Posts
    106

    Default

    Afternoon ratters.

    I use Power Twist Plus https://www.carbatec.com.au/rockler-...tion-reduction

    For your consideration. Cheers, Mark


    Sent from my iPhone using Tapatalk

  3. #3
    Join Date
    Jan 2009
    Location
    Holbrook, NSW
    Age
    70
    Posts
    413

    Default belt

    Quote Originally Posted by ratters View Post
    Gday,

    Wondering if anyone can confirm which length of belt I need for the headstock pulley on my horizontal drive model A?

    I noticed that the motor kind of bobs up and down as the machine runs and for a while couldn't work out how this was possible and then it occurred to me that the headstock belt must be stretched or whatever, because it would appear to be the culprit and it brings the floating rear pulley/motor assembly in and out as it runs.

    I can see AMH website does list a few belts but none that are specifically for the horizontal belt setup, or at least that I could see.

    Cheers,
    ratters
    If that's an "N" pattern vee belt drive, as it appears to be, the early parts manual says it will be the standard A35 belt.
    Attached Images Attached Images

  4. #4
    Join Date
    Dec 2014
    Location
    Tasmania
    Posts
    83

    Default

    Thanks for the info guys I ended up getting an A35 V belt locally and its the right one. I have some new headstock spindle oiler felts to go in at the same time while its all apart.

    It's a curious design really, I like the ease of changing speeds with the lever but it does allow for this kind of unwanted reciprocating motion of the rear motor/pulley assembly.

    Yes mine would be the 'N' pattern @allterrain50

    Cheers,
    ratters

  5. #5
    Join Date
    Sep 2012
    Location
    North Yorkshire UK
    Posts
    4,195

    Default

    Hi Ratters,

    If it still bobs about with a new belt, either pulley might not have the bore properly centred !
    Best Regards:
    Baron J.

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