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Thread: Hand Crank Discussion

  1. #26
    Super Member SteveH's Avatar
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    So, here is a drawing of the first pass at a idea for a mount.

    It will need details like bolt holes to mount the upper and lower halves together around the machine shaft and a sliding threaded bit to go in the slot for the hand-crank to mount to.

    There may be bending needed to get the drop tongue portion it far enough back to simulate the boss location on a bossed machine

    Name:  non-boss mount.jpg
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    here we go..... Thoughts?

  2. #27
    Power Poster miriam's Avatar
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    Quote Originally Posted by SteveH View Post
    So, here is a drawing of the first pass at a idea for a mount.

    It will need details like bolt holes to mount the upper and lower halves together around the machine shaft and a sliding threaded bit to go in the slot for the hand-crank to mount to.

    There may be bending needed to get the drop tongue portion it far enough back to simulate the boss location on a bossed machine

    Name:  non-boss mount.jpg
Views: 71
Size:  6.1 KB

    here we go..... Thoughts?
    If it mounts to the shaft, where does the hand wheel fit? Does it need a hand wheel? How universal are the ends of the shaft that holds the hand wheel? I would love to test one out...
    NEVER let a sewing machine know you are in a hurry.
    good mothers let you lick the beaters - great mothers turn it off first

  3. #28
    Super Member SteveH's Avatar
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    The idea/hope is to have the lower half of this mount to the the belt guard. the upper half was drawn for clarity. (I did not want to try to Google sketch-up the belt guard.

  4. #29
    Super Member SteveH's Avatar
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    i cannot imagine that there are more than three diameters at best, simple bushings.

  5. #30
    Super Member jlhmnj's Avatar
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    Quote Originally Posted by miriam View Post
    If it mounts to the shaft, where does the hand wheel fit? Does it need a hand wheel? How universal are the ends of the shaft that holds the hand wheel? I would love to test one out...
    Sounds like a good excuse to buy up a bunch of different machines.
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  6. #31
    Super Member SteveH's Avatar
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    so this is a PRC (Chinese) clone?

  7. #32
    Super Member jlhmnj's Avatar
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    Yes, that's the only style currently being made that I'm aware of. There might be 2 or 3 different manufacturers but the body is cast as one piece on all.

    Jon

  8. #33
    Super Member SteveH's Avatar
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    an improved version might be more like.
    Name:  Non-Bossed Hand Crank Mount v2.jpg
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    with this mounting to the underside of the belt guard

  9. #34
    Power Poster miriam's Avatar
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    I am hoping I can post some pics of an old motor mount - for more pictures, Steve, send me a PM with your email address.
    Last edited by miriam; 01-08-2013 at 12:01 PM.
    NEVER let a sewing machine know you are in a hurry.
    good mothers let you lick the beaters - great mothers turn it off first

  10. #35
    Power Poster miriam's Avatar
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    motor mount:
    Name:  003.JPG
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    NEVER let a sewing machine know you are in a hurry.
    good mothers let you lick the beaters - great mothers turn it off first

  11. #36
    Power Poster miriam's Avatar
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    How about a hand crank on that little pin?
    Name:  025.JPG
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    NEVER let a sewing machine know you are in a hurry.
    good mothers let you lick the beaters - great mothers turn it off first

  12. #37
    Power Poster miriam's Avatar
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    more pics of the motor mount maybe:
    Name:  014.JPG
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    NEVER let a sewing machine know you are in a hurry.
    good mothers let you lick the beaters - great mothers turn it off first

  13. #38
    Power Poster miriam's Avatar
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    It would also be very nice if we didn't have to cut or replace a hand wheel for a spoked wheel - I know, I'm a dreamer...
    NEVER let a sewing machine know you are in a hurry.
    good mothers let you lick the beaters - great mothers turn it off first

  14. #39
    Power Poster miriam's Avatar
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    Oh and the foot control is very cool, too
    Name:  019.JPG
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    NEVER let a sewing machine know you are in a hurry.
    good mothers let you lick the beaters - great mothers turn it off first

  15. #40
    Power Poster miriam's Avatar
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    Quote Originally Posted by SteveH View Post
    an improved version might be more like.
    Name:  Non-Bossed Hand Crank Mount v2.jpg
Views: 57
Size:  4.8 KB

    with this mounting to the underside of the belt guard
    Steve, I have enough machines if you need to test this out you can send one... or I can send pics of undersides...
    NEVER let a sewing machine know you are in a hurry.
    good mothers let you lick the beaters - great mothers turn it off first

  16. #41
    Super Member SteveH's Avatar
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    Thank you, I may take you up on that.

    I am a big believer in Sun-Tzu and his concepts, so I will plan until I am reasonably sure of victory.

    This drawing is the concept, now I just need to validate the concept against a number of machines, and then develop actual dimensions.

    Fabrication should be the easy part.

    When I get home tonight I can check the concept against my 28, 128, 66, 15-91, 201-2, and the White FR.

    (I know the 15 and the 201 have bosses, but they might be worth checking against anyway)

  17. #42
    Power Poster miriam's Avatar
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    The Singer 306 and Singer 319 I have are two that I would love to HC but the boss is offset from center. Is there a way to make an extension for them?
    NEVER let a sewing machine know you are in a hurry.
    good mothers let you lick the beaters - great mothers turn it off first

  18. #43
    Junior Member makitmama's Avatar
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    here is a vintage hand crank and a new one side by side. The new one does not have the protrusions on the base, and the 'leg' of the mounting bracket is longer.
    Attached Images Attached Images

    Cil



    I'm a Queen.... at least my pantyhose say I am!


    (proud caretaker of a magenta 221, purple 222, assorted 66's, a 301, a pink Atlas and Monarch, and Granny's 201-2.

  19. #44
    Super Member J Miller's Avatar
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    Miriam, I'm glad I didn't see that motor or I'd of made an offer for it. Been wanting one of them.
    Gas pedal is cool too.

    Joe

  20. #45
    Super Member SteveH's Avatar
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    Quote Originally Posted by miriam View Post
    The Singer 306 and Singer 319 I have are two that I would love to HC but the boss is offset from center. Is there a way to make an extension for them?
    I would imagine that it could be done. Remember the idea that I am pursuing currently is to NOT use the boss at all.

    Go ahead and shoot me a picture and I will add it to the "process".

  21. #46
    Super Member SteveH's Avatar
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    Quote Originally Posted by makitmama View Post
    here is a vintage hand crank and a new one side by side. The new one does not have the protrusions on the base, and the 'leg' of the mounting bracket is longer.

    Any chance of getting the variance on those two dimensions? The distance from the back of the unit to the end of support arm.

  22. #47
    Super Member SteveH's Avatar
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    This picture is great! here is the "rub".

    Name:  014.JPG
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  23. #48
    Junior Member makitmama's Avatar
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    it just slides over the wheel shaft. See my 66's below- so the bobbin winder is attached. A screw thru the top of the small
    arch only.
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    Cil



    I'm a Queen.... at least my pantyhose say I am!


    (proud caretaker of a magenta 221, purple 222, assorted 66's, a 301, a pink Atlas and Monarch, and Granny's 201-2.

  24. #49
    Super Member BoJangles's Avatar
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    Quote Originally Posted by SteveH View Post



    I am planning to keep my thoughts mostly to myself until I have most of the details sorted out but I'll say that my idea includes inspiration from the "jackrabbit" (motor on spring-loaded base to contact treadles and run them as electrics) as well.

    Nancy, can you shoot me a photo of the boss area on your New Home?
    I will get out to my little sewing machine museum and shoot a photo soon.

    Ok the "jackrabbit" motor as I remember it, is basically a friction pulley motor, which my little New Home has. I can see your train of thought - make a HC that works similar to a friction pulley motor. If you did figure something like that out, it wouldn't matter what size the HW is or the spacing of the spokes of the hand wheel. Interesting. If you could come up with something like a friction pulley system, even a smooth non-spoked wheel could be hand cranked. Of course, you still have to figure out a way to attach the whole contraption to the machine!

    Nancy
    Last edited by BoJangles; 01-08-2013 at 02:15 PM.

  25. #50
    Power Poster miriam's Avatar
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    Quote Originally Posted by BoJangles View Post
    I will get out to my little sewing machine museum and shoot a photo soon.

    Ok the "jackrabbit" motor as I remember it, is basically a friction pulley motor, which my little New Home has. I can see your train of thought - make a HC that works similar to a friction pulley motor. If you did figure something like that out, it wouldn't matter what size the HW is or the spacing of the spokes of the hand wheel. Interesting. If you could come up with something like a friction pulley system, even a smooth non-spoked wheel could be hand cranked. Of course, you still have to figure out a way to attach the whole contraption to the machine!

    Nancy
    OH That would be wonderful. Attach it to the cabinet or the case? Hang it from the shaft - the shafts can be different. I should go pull some wheels photo - see what all the differences are. Maybe tomorrow - it is starting to get dark here already today.
    Last edited by miriam; 01-08-2013 at 02:33 PM.
    NEVER let a sewing machine know you are in a hurry.
    good mothers let you lick the beaters - great mothers turn it off first

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