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IndustryArena Forum > MetalWorking Machines > Benchtop Machines > Mini Lathe > HF 3 Jaw chuck -- reversible jaws?
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  1. #1
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    HF 3 Jaw chuck -- reversible jaws?

    I have the HF 8x12 lathe. It comes with a 4" 3 Jaw chuck. The specs say the jaws are reversible. So far, I have not been able to figure out how to do that. I can take the jaws out of the chuck with no problem. However, if I flip them over so that I can chuck larger pieces, the grooves in the jaws are going in the wrong direction to engage the spiral scroll in the chuck head.

    There must be something obvious I am missing ...

  2. #2
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    Did you get it new? My 11x26 says the same but it actually is an extra set included in the tool kit that is the reversible jaws.

    JTCUSTOMS

  3. #3
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    Yes, I did purchase it new. However, it is not out of the question they could have made a mistake in what they packed. There is one extra jaw, but it is a replica of a jaw I have already.

    Unfortunately, I have had the lathe for over a year, so I doubt they would be willing to correct a mistake now.

    So, reversible jaws actually means two sets of jaws that you can change out?

    If so, I probably need something like the outside jaws from LMS:
    LittleMachineShop.com - Jaws, Outside for 4" 3-Jaw Chuck

  4. #4
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    Based on this tip, I looked closely at the owners manual. Sure enough, buried down in the parts list it says, "3 reverse jaws for chuck". I am guessing these are the parts they missed packing. I will scour my lathe toolbox closely, but I don't remember ever seeing these.

  5. #5
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    Every 3 jaw chuck I have owned has came with inner and outer jaws.... or so called reversible jaws. It should have came with a set for clamping to the inside of a part and a set for clamping to the outside of a part.
    Jermie
    http://www.eartaker.net http://thehorticulture.net

  6. #6
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    Quote Originally Posted by eartaker View Post
    Every 3 jaw chuck I have owned has came with inner and outer jaws.... or so called reversible jaws. It should have came with a set for clamping to the inside of a part and a set for clamping to the outside of a part.
    The chuck on my 14x40 has reversible jaws that actually just unbolt and flip then re-install so no extra set to lose

    JTCUSTOMS

  7. #7
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    My 4 jaw is like that but how is that even possible on a 3 Jaw? Does it use a scroll?
    Jermie
    http://www.eartaker.net http://thehorticulture.net

  8. #8
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    Yes it is a scroll but the jaws are bolted to the inserts for the scroll
    they have 2 bolts that bolt through the face of the jaw and are keyed to the insert just unbolt and flip
    similar to this one but larger http://cdn8.grizzly.com/pics/jpeg1000/s/sb1310.jpg

    JTCUSTOMS

  9. #9
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    Ahhh, my dads South Bend is like this.
    Jermie
    http://www.eartaker.net http://thehorticulture.net

  10. #10
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    Found parts

    Sure enough, down at the bottom of my parts bin are the 3 outside jaws. I did not realize what they were when I first unpacked the lathe and eventually I forgot all about them. Nothing is so obvious that it cannot be a mystery to a beginner. I think "interchangeable" or would be a better term than "reversible".

    Anyway, many thanks to everyone for the clarification!

  11. #11
    pratt burnerd
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    Quote Originally Posted by rgarrett7 View Post
    I have the HF 8x12 lathe. It comes with a 4" 3 Jaw chuck. The specs say the jaws are reversible. So far, I have not been able to figure out how to do that. I can take the jaws out of the chuck with no problem. However, if I flip them over so that I can chuck larger pieces, the grooves in the jaws are going in the wrong direction to engage the spiral scroll in the chuck head.

    There must be something obvious I am missing ...
    Your manual says "reverse jaws" not reversable. this is a Asia term from the forward and reverse jaws as opposed to the european insdie and outside term

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