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  #1  
Old 10-26-2018, 12:55 PM
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Arc Swivel Tech Support

Now that a rather significant number of speed baggers have my Arc swivel installed, I think it is a good idea to open a thread here for tech support issues or questions.

I will start by discussing a problem existing in a (very) few of the latest units I shipped, a couple of Arc Gammas that went to new forum member Mydogsparty.

I recently made a batch of nylon tri-hooks for the Arc swivel, and that batch had a few defective units that I should have noticed and rejected, but I missed them. Fire my quality control department! Oh, wait, since this is only my hobby, I don't have a quality control department. Oh well...

I thank Mydogsparty for promptly letting me know there was a problem, and I was very happy to be able to identify and fix it. At first, I thought the defective tri-hooks may have gone out to more people, but it seems that he was the only person to get bad ones. If I am wrong, please contact me.

The specific problem with those tri-hooks is a thing in the 3D printing world called under-extrusion. I believe there was a partial jam of material that caused a few tri-hooks to be less than 100% filled and fused nylon polymer. They looked ok but did not perform. They were weak, and deformed and failed with normal stresses of holding the speed bag.

Who can guess which tri-hook is the good one and which one is the bad one?

A correctly made Arc tri-hook can withstand over 400 lbs. of static tension and is even stronger than a stock Everlast S-hook! Not theory, I tested.
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Old 10-26-2018, 01:57 PM
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My guess is he hook on the right is the defective one.
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Old 10-26-2018, 01:58 PM
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Is the one on the left the bad one? 400 lbs. of static tension -- that's amazing.
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Old 10-26-2018, 02:12 PM
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Yes, paranday, the hook on the left is the bad one. Here is a pic of the result of my tension failure test.

These are before and after pics of the tri-hook and the steel Everlast hardware that was holding my tri-hooks during the test...



You can see slight deformation of my tri-hook on the right, but it did not fail. I had to stop the test before the Everlast hook gave out. The max load was around 425lbs. I now use that brave tri-hook as a key chain.

-Rusty
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Old 10-26-2018, 02:16 PM
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Here is the technical data from the test. Note at how at the very end of the test, the max load dropped from 425lbs and started sloping down before I released the pressure from my hydraulic jack. That was when the steel Everlast s-hook started to fail.

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Old 10-27-2018, 11:06 AM
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Here are a couple of vids showing how to remove and re-install a tri-hook.

Removal


Installation
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Old 10-27-2018, 07:56 PM
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Arc's Away

Rusty - The Arc Series in my opinion, stands alone in "Style" and "Performance" Silk smooth (short) action, with a noise control vibe, effortless change out of bags. The 'State of Bag World' is in good hands here on the Forum. Great product and most of all it's made by our own member! Rusty great stuff! ArtOfTheBag
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Old 11-02-2018, 06:13 PM
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G-Town, your avatar... seriously. Update that mofo

-Rusty
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