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  1. #1
    Join Date
    Apr 2009
    Location
    Kingswood
    Posts
    930

    Default Kondia FV-1 Mill Pulley Belt Size

    My Kondia FV-1 has a really tight drive belt fitting.
    I cannot get the belt onto the slowest speed pulleys unless I remove one of the motor mount bolts.
    The photo shows in the top right corner the head of a clamp used in place of the bolt.

    The manual quotes the belt as a "V" belt A 839.
    Fitted is a Gates Greenstripe XL 13A0865.

    My judgement is that another 10 mm separation between pulleys would be easily accommodated, making the belt a 885.

    How can my situation be so different to the documented size ?
    Any suggestions ?



    John.
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  2. #2
    Join Date
    Sep 2006
    Location
    Mallacoota,VIC,Australia
    Age
    53
    Posts
    1,010

    Default

    I know in Australia our drive belts are measured on the inside, but in the USA they are measured on the outside perhaps this is causing the issue. It sounds a bit like your belt is too tight as you can't change it to the slowest speed. Is the belt tight when you change it to the other speeds ?. I tried searching for a 'A839' and a '839' Drive Belt but couldn't get anything to come up.
    All The Best steran50 Stewart

    The shortest way to do many things is to do only one thing at once.

  3. #3
    Join Date
    Jun 2012
    Location
    melbourne
    Posts
    341

    Default

    Here's mine. I think my pulleys look the same distance apart as yours. You could probably just get a belt that fits and forget about it.
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  4. #4
    Join Date
    May 2015
    Location
    Richmond
    Posts
    214

    Default

    Quote Originally Posted by steran50 View Post
    I know in Australia our drive belts are measured on the inside, but in the USA they are measured on the outside perhaps this is causing the issue. It sounds a bit like your belt is too tight as you can't change it to the slowest speed. Is the belt tight when you change it to the other speeds ?. I tried searching for a 'A839' and a '839' Drive Belt but couldn't get anything to come up.
    Classical Metric v belts are measured on the pitch circumference. Imperial v belts are measured on the inside circumference.

  5. #5
    Join Date
    Nov 2008
    Location
    North Brisbane. Qld. Australia
    Age
    70
    Posts
    1,511

    Default

    Might be way off here but is it possible you should be using an 11A belt rather than 13A?
    Nev.

  6. #6
    Join Date
    Apr 2009
    Location
    Kingswood
    Posts
    930

    Default

    Thanks for the inputs.

    The belt is tight for the other speeds, but manageable.

    Confusion on measurement:
    - metric is pitch,
    - imperial is inside,
    - US is outside,
    - AU is inside.

    Sossity is probably correct, just get a bigger belt.
    I will go with my gut feeling and get something like an 885.

    The 11A vs 13 A needs reviewing also.

    John.

  7. #7
    Join Date
    Dec 2013
    Age
    56
    Posts
    1,416

    Default

    Some manufacturers measure inside, some outside as said above. Just order the belt the next size up if you think that will fix your problem, don't sort what's the designated size.

    I went to my local bearing place last week and bought 2 x 31 inch belts, they where the metric equivalent so I took my belt along to check.

    Why in this day and age there isn't a standardized size I don't know.
    Using Tapatalk

  8. #8
    Join Date
    Aug 2008
    Location
    Charlestown NSW
    Age
    65
    Posts
    1,669

    Default

    I have the same problem on my old Hafco. Its on the roundtuit list.
    The user manual has some exploded view drawings with all the parts shown and numbered with a corresponding parts list.
    On the list the belt is called "Belt". No size or anything. duh. How hard would it have been when they were setting the manual up to include the belt size?

    peter

  9. #9
    Join Date
    Apr 2009
    Location
    Kingswood
    Posts
    930

    Default

    Purchased a new belt, Gates Green Stripe XL 13A0890.
    This was the nearest available to the 885 estimated.

    Changed the belt today.
    Complete success.
    Belt noise is good, changing to the lowest pulley speed is not 'easy' but quite doable.

    Some of the improvement may be in the belt section.
    Old is 12.1 mm wide, new is 11.9 mm.

    I am sure those that have changed a belt on a Bridgeport/Clone mill would know why I have come in from the workshop and poured a soothing ale !

    Keep well,
    John.

  10. #10
    Join Date
    Jul 2006
    Location
    Athelstone, SA 5076
    Posts
    4,255

    Default

    A section belt should be same as all clones. Mine is an A33 which is 839mm

  11. #11
    Join Date
    Aug 2008
    Location
    Charlestown NSW
    Age
    65
    Posts
    1,669

    Default

    I changed mine recently as well. Pulled the motor off to get the old belt off. Then I remembered I had some old belts and was lucky enough to find one that was slightly longer than the hold one. Also found that the bearings in the front pulley were pretty noisy. Still turn smooth but noisy. I have since bought some new ones but have yet to fit them. The lining on one of the spindle brake shoes had come off as well which was why the brake didnt work very well. I epoxied that back onto the shoe. Works great now.
    Just have to make some face pin spanners so I can replace the bearings.
    peter

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