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  • Jacobs Chuck question

    i have a number 14 jacobs chuck called a spirial gear chuck. it needs a special spirial cut key to tighten it. its also about 4 years older than dirt.
    i called jacobs customer service and they kinda laughed at me. . . . no one there thats old enuf to remember i was told.
    its only a 1/2" but its in beautiful condition and if i use a rubber strap wrench i can tighten it enufto hold smaller bits tight but i would like to have the real key if anyone knows of one. i could take a picture of it if anyone can help me or has a need to see it. . .
    thanks in advance
    davidh

  • #2
    I've seen them, and yes, they are VERY old. But I don't know where you'll get a picture of one, much less a key.
    Russ
    Master Floor Sweeper

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    • #3
      as far as a picture is concerned, i have the chuck so a photo is pretty easy. but i do want a key to fit it. . . . . . .

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      • #4
        Sorry i can't help, but i'd love to see a picture - i like old tools!

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        • #5
          Make one.

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          • #6
            i will post a picture today. make one ? maybe if i could see a real one first. but then again i really don't think i have that talent. but then again. . .

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            • #7
              Sounds like a museum piece to me. Perhaps a carefully worded E-Bay search might yield results in 5 or 10 years. I doubt you would have much trouble winning the bid.

              But why would they use a spiral? Seems like it would make it easier to tighten or to loosen depending on the direction of the spiral. But why? It just seems like a lot of trouble to manufacture for no real advantage.
              Paul A.
              SE Texas

              Make it fit.
              You can't win and there is a penalty for trying!

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              • #8
                we' try a couple pix's here. . .
                <a href="http://s260.photobucket.com/albums/ii12/tooldoc/?action=view&current=spirialchuck.jpg" target="_blank"><img src="http://i260.photobucket.com/albums/ii12/tooldoc/spirialchuck.jpg" border="0" alt="Photobucket"></a>
                <a href="http://s260.photobucket.com/albums/ii12/tooldoc/?action=view&current=HPIM0547.jpg" target="_blank"><img src="http://i260.photobucket.com/albums/ii12/tooldoc/HPIM0547.jpg" border="0" alt="Photobucket"></a>

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                • #9
                  lets try again

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                  • #10
                    I think the spiral was to help keep the key seated when really reefing it down tight. However, I've got to believe that was less than successful when trying to open the chuck after such a tightening, which is likely why we don't see them now (along with more complex/costly manuf).
                    Russ
                    Master Floor Sweeper

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                    • #11
                      They turn up from time to time, but I have never seen a key. This is one in the 8-1/2 size.



                      It has a patent date of 1925 and is marked Super Chuck in script the same as the early Super Chucks. They were apparently the first version of the Ball Bearing Super Chucks as they use the same size designations; 8-1/2, 14 etc. But they were probably a short lived version as I can see that it would be possible to get the chuck quite tight, but loosening would drive the key out.
                      Jim H.

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                      • #12
                        with the heavy duty serrations on the outside, i just used hand tightening for a 1/4" bit and it held. too nice to sit on a shelf. jacobs had no interest at all, not surprised at that. .
                        i will probably just keep using it with a HF rubber strap wrench to tighten it as its sooooo nice and true for my purposes. thanks for the input

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                        • #13
                          I'm almost certain i have seen a key for one of these at a surplus tooling place near me, they have a ton of old stuff, ill take a look over the weekend and see if its still there, if it is i can easily get it then stick it in an envelope to the US or where ever.

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                          • #14
                            fantastic. . . . .
                            email [email protected]
                            david
                            tons of thank yous !

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                            • #15
                              Originally posted by sconisbee
                              I'm almost certain i have seen a key for one of these at a surplus tooling place near me, they have a ton of old stuff, ill take a look over the weekend and see if its still there, if it is i can easily get it then stick it in an envelope to the US or where ever.

                              did you ever find key for my old chuck ?

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