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Thread: Thumler's Tumbler Model B Hi-speed belt -equivalent o-ring size

  1. #41
    Boolit Buddy
    AZ Pete's Avatar
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    Quote Originally Posted by Airman Basic View Post
    Well, after a couple of years, my Model B belt bit the dust while on its first run of SS pin tumbling. I bought the Home Depot o ring. It started slipping within a few minutes. i did find another substitute though. I have an '08 Tundra with 5.7 l engine. The oil filters from Toyota come with a new o ring. I keep one extra for grins. Just so happens it fits the Thumbler's Tumbler Model B. It's larger in cross section than the Home Depot o ring, and seems to be working for the time being. We'll see how it lasts. No risk since I get one every 5,000 miles, and the filter element with o ring is only $5.00
    NRA Endowment Life Member

  2. #42
    Boolit Master Bayou52's Avatar
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    Hi, AZ Pete-

    Thanks for posting to this thread. I started this thread back in Nov. 2013 to inform Thumlers Model B users that I was having issues with factory belts breaking too frequently but that I came upon a good and much cheaper alternative. That was the ethylene-propylene o-ring described above in my previous posts in this thread.

    By way of status, I am still using the very first o-ring that I started out with. It has lasted well over a year ar now, and it is still working like a champ. Well worth the 80 cents it cost. I'm not sure how many tumbling sessions I have on this o-ring but it is clearly in the multiple dozens. Compare this with the factory belts breaking after only a couple of sessions (at $5-$6 a pop, at that).

    So, based on my personal experience, I can confidently endorse this o-ring for the Thumlers Model B application.

    Hope this is informative....

    Bayou52
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  3. #43
    Boolit Buddy
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    Hey Bayou, I just got my order of "o" rings. Thanks for the tip.
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  4. #44
    Boolit Master Bayou52's Avatar
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    Quote Originally Posted by AZ Pete View Post
    Hey Bayou, I just got my order of "o" rings. Thanks for the tip.
    Hi, AZ Pete-

    I hope you have as much luck as I've had with those o-rings. The very first one is still working like a champ - going on nearly 1 1/2 years of regular use.

    Happy Tumbling-

    Bayou52
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  5. #45
    Boolit Mold
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    Hello Bayou 52,
    Are you still looking for a way to make your tumblers tumbler gear driven? I converted mine, more than happy with it.....
    No more belts!!!!!!
    That is the way to go!!
    IT SURE RUNS GOOD NOW, NO BABY SITTING IT!
    Last edited by BOONES; 10-11-2017 at 02:27 PM.

  6. #46
    Boolit Master Bayou52's Avatar
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    ^^^^^ Hi, Boones -

    Since I started using o-rings in the place of belts for my Thumlers, it's been several years now, and I'm still using my very first o-ring. So, I think that problem has been solved.

    I would love to see a pic of your gear conversion job, though. Can you post one?

    Thanks, Boones -

    Bayou52
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  7. #47
    Boolit Master


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    Quote Originally Posted by gwpercle View Post
    What department of Home Depot, I'm not familar with a filtration unit. I want something I can buy locally but home depot is a big place to wander around aimlessly looking for something I have no idea what it is or looks like. Do you have a home depot or manufacturer's product number ? would appreciate it.

    Gary
    Before you can find ANYTHING at HD you have to believe it is there.
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    He hath shewed thee, O man, what is good; and what doth the LORD require of thee, but to do justly, and to love mercy, and to walk humbly with thy God?

    "I don't have hobbies - I'm developing a robust post-apocalyptic skill set"
    I may be discharged and retired but I'm sure I did not renounce the oath that I solemnly swore!

  8. #48
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    I thought I had replied to this thread earlier.

    I saw this when it first came out and promptly,,,

    Wrote the O-Ring Dimensions on the box of my Tumbler for future reference.

    Might be a good idea huh?

    Randy
    "It's not how well you do what you know how to do,,,It's how well you do what you DON'T know how to do!"
    www.buchananprecisionmachine.com

  9. #49
    Boolit Master Bayou52's Avatar
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    ^^^^^ Outstanding idea, Randy!

    Bayou52
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  10. #50
    Boolit Mold
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    Hello all!
    Soon to come chain driven kit for model b!
    5 TONS W/GUNS
    Last edited by BOONES; 10-11-2017 at 02:33 PM.

  11. #51
    Boolit Mold
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    Anybody interested please let us know!
    Thank you for your time!
    Blessing!

  12. #52
    Boolit Mold
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    Model b chain driven

    Working on patent!

  13. #53
    Boolit Master Bayou52's Avatar
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    Quote Originally Posted by BOONES View Post
    Anybody interested please let us know!
    Thank you for your time!
    Blessing!
    I'm interested in checking it out. Any info would be appreciated -

    Bayou52
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  14. #54
    Boolit Buddy SgtDog0311's Avatar
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    Old thread but helpful nonetheless. Mine just failed after three years and had a batch to tumble so I could get them in the mail. Belt didn't break, just got so stretched it wouldn't grab. I used a large rubber band to under the belt and darned if it didn't hold out.

    Appreciate tips for new belt. Didn't mind the cost of Thumblers but danged if I'll double it on shipping.
    Best Regards,
    John

  15. #55
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    If you haven't found one yet send me a PM with shipping info and I'll send you one.

    gmsharps

  16. #56
    Boolit Master Bayou52's Avatar
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    Hi, Guys -

    The first o-ring I started using about 5 years ago finally needed replacing. It didn't break but just loosened up enough not to grab the pulley well. For me, the o-rings outlasted the factory belts by a long shot.

    Bayou52
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  17. #57
    Boolit Grand Master

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    Many guys have used the correct size vacuum cleaner belt with good results. I used to get "O" rings from a hydraulic repair shop.

  18. #58
    Boolit Master


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    I worked at HD, opened store #1239 a few years back. As I recall, the rule is: You have to believe something is there before you can find it. I was a Hardware Associate-we had half the SKU's in the store.
    Micah 6:8
    He hath shewed thee, O man, what is good; and what doth the LORD require of thee, but to do justly, and to love mercy, and to walk humbly with thy God?

    "I don't have hobbies - I'm developing a robust post-apocalyptic skill set"
    I may be discharged and retired but I'm sure I did not renounce the oath that I solemnly swore!

  19. #59
    Boolit Master
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    I have read of the Thumbler's O ring issues in several forums for years.

    I bought a Model A in about 1969 with a couple of spare belts.
    I still have that tumbler and it still runs on the original belt. I lost the spares long ago.
    I wonder why my belt has lasted so long?
    EDG

  20. #60
    Boolit Master
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    Go on " the Oring Store . navigate the site
    you Need a 70 Buna 3/16" size scroll down until you find your size . you can buy By the dozen.
    sal
    NRA Endowment Member
    International Ammunition Association
    ARTCA
    New York, the Empire State Where Empires were Won and Lost

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Abbreviations used in Reloading

BP Bronze Point IMR Improved Military Rifle PTD Pointed
BR Bench Rest M Magnum RN Round Nose
BT Boat Tail PL Power-Lokt SP Soft Point
C Compressed Charge PR Primer SPCL Soft Point "Core-Lokt"
HP Hollow Point PSPCL Pointed Soft Point "Core Lokt" C.O.L. Cartridge Overall Length
PSP Pointed Soft Point Spz Spitzer Point SBT Spitzer Boat Tail
LRN Lead Round Nose LWC Lead Wad Cutter LSWC Lead Semi Wad Cutter
GC Gas Check