Oneway Stronghold chucks for Powermatic & Oneway lathes

Woodshop
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I have found the large Oneway Stronghold scroll chucks for the Powermatic & Oneway lathes several times over the past couple of months in the photo below:

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I’m guessing this occurs when someone opens the scroll until one of the jaws falls out. There used to be a pin on the bottom of one of the top jaws, which if installed in position #2 or #4 would prevent the chuck from being opened too wide. However, the pins are gone from all of the top jaws, so we must be cautious about opening the chuck too wide.

If you happen to open the chuck and one of the jaws fall out, here is how you can reassemble the top jaws properly:

  1. Rotate the scroll out until you can remove all of the jaws
  2. Rotate the scroll in until you can see the thread start at location 1.
  3. Back the scroll up until the start of the thread just disappears, and slide the No. 1 base jaw into the slot.
  4. While pushing inward on the No. 1 base jaw, rotate the scroll 90Þ. Pull outward on the No.
  5. 1 base jaw to make sure that it has engaged properly with the scroll. If the jaw comes out, start the process again.
  6. Rotate the scroll until you can see the thread start at location 2.
  7. Back the scroll up and slide the No. 2. base jaw into the slot. Push on the jaw, and rotate the scroll, as you did for the No. 1 base jaw.
  8. Repeat these steps for the No. 3 and No. 4 base jaws.
  9. Rotate the scroll all the way in to check that all the jaws meet in the centre. If they don’t, you may have put the base jaws onto the scroll in the wrong order, or into the wrong slots, or one of the jaws may not have engaged properly onto the scroll. If the jaws do not meet in the centre, open the scroll until the jaws come out, and give it another try.

The chucks for the two lathes are identical EXCEPT the adapters. The Powermatic is english 1-1/2"- 8 RH and the Oneway lathe is M33 - 3.5. Please do not use these interchangeably.

Here is the link for the chucks:

https://oneway.ca/pdf/stronghold.pdf

Please let know if you have any questions. I may not be able to answer it, but I know a guy…

Jeff

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Thanks for fixing this, and for the instructions for the future.

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Are new pins available? I didn’t see any specifications on those anywhere but if they are what is shown here perhaps we could make them in Machine Shop?
image

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That appears to be a roll pin. Spring steel rolled up and hardened, that puts tension on the inside of a properly sized hole. Just a matter of measuring diameter and knowing length. Then a wide range of sources exist depending on how common a size it is. Shipping, or gas to go pick it up will cost more than the part.

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I didn’t think ‘Roll Pin’ but that makes sense. Might be able to source locally; e.g. https://www.harborfreight.com/315-piece-roll-pin-assortment-67682.html

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Ace sells them. I bought the ones for the drum sander there.

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