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Thread: building a 6" dredge, need some help finding parts

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  1. #16
    us
    Commercial Diving Company Owner

    Feb 2005
    Eastern PA
    Garrett At Pro, MX500 Proton Mag fisher gold bug, whites PI, Garrett gold scorpion
    247
    186 times
    Prospecting
    Reed,
    the one on the pedestal is off a 10hp briggs, so its the small impeller and same as my 8hp factory keene

    those small drums are hard to find in my area and ive build aluminum pontoons for my 2 last dredges. the aluminum i use is .100 thickness, the ones on my 4" have had 5 years of hard abuse on them and are still going strong

    the 5ft x 10ft sheets i got are 67 lbs each so i can make a 6ft pontoon and still have extra left over from each one to make some more smaller sluices for future projects or a sump and pair of side sluices for this one

    the pontoons will be 2 pieces. the bottom and sides will be bent out of one piece and the top welded on after i weld up the front slant nose and rear of each . the back pontoon will have flats front and back
    Reed Lukens likes this.

  2. #17
    us
    Commercial Diving Company Owner

    Feb 2005
    Eastern PA
    Garrett At Pro, MX500 Proton Mag fisher gold bug, whites PI, Garrett gold scorpion
    247
    186 times
    Prospecting
    spent sunday building my sheet metal bender for the pontoons, i made it 8ft wide so i can bend the 6ft long pontoons and any future sluice boxes. ill post some pics of it tomorrow

  3. #18
    us
    Commercial Diving Company Owner

    Feb 2005
    Eastern PA
    Garrett At Pro, MX500 Proton Mag fisher gold bug, whites PI, Garrett gold scorpion
    247
    186 times
    Prospecting
    ETA: dont know why the pictures turned sideways, they were right side up when i loaded them

    finished bender is 96 inches between end plates. will mainly be used on .100 aluminum for the pontoons on my 6" project and future sluice boxes . will test it this weekend




    Click image for larger version. 

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ID:	1790443end extensions welded to bench, ready for base angle
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ID:	1790447main angle attached to bench, end plates attached and pivit bar welded to bending angle
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ID:	1790448
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ID:	1790449Click image for larger version. 

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ID:	1790450Click image for larger version. 

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ID:	1790451hold down bar installed and handle pockets welded on
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ID:	1790452hold down bar and jam bolts installed and return springs installed and ready to bend
    Last edited by njcommercialdiver; Jan 15, 2020 at 11:09 PM.

  4. #19
    us
    Commercial Diving Company Owner

    Feb 2005
    Eastern PA
    Garrett At Pro, MX500 Proton Mag fisher gold bug, whites PI, Garrett gold scorpion
    247
    186 times
    Prospecting
    since it was raining all day, i started work on the pontoons, laid them out on a piece of cardboard to verify proof of concept and make sure the bow was as high as the sides
    Click image for larger version. 

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ID:	1794626from my calculations, i had to add 7" to length to make up for bow angle
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ID:	1794627cut out and ready for test trial
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ID:	1794628my calculations were correct, now on to the aluminum
    Last edited by njcommercialdiver; Jan 25, 2020 at 10:43 PM.
    N-Lionberger and Reed Lukens like this.

  5. #20
    us
    Commercial Diving Company Owner

    Feb 2005
    Eastern PA
    Garrett At Pro, MX500 Proton Mag fisher gold bug, whites PI, Garrett gold scorpion
    247
    186 times
    Prospecting
    dont know why the pics turn sideways
    Click image for larger version. 

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ID:	1794630
    Click image for larger version. 

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ID:	1794629laid out and ready for cutting
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ID:	1794631ready for first cut
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ID:	1794632first pontoon cut out
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ID:	1794633both front pontoons ready for bending
    Reed Lukens and N-Lionberger like this.

  6. #21
    us
    Commercial Diving Company Owner

    Feb 2005
    Eastern PA
    Garrett At Pro, MX500 Proton Mag fisher gold bug, whites PI, Garrett gold scorpion
    247
    186 times
    Prospecting
    back pontoon laid out and cut, ready for bending
    Click image for larger version. 

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ID:	1794634

    i also cut 2 of the tops out but didnt take a pic of them. ill bend them up tomorrow


    winners,
    i got another 4" intake foot valve from Roger
    Last edited by njcommercialdiver; Jan 25, 2020 at 10:49 PM.
    N-Lionberger and winners58 like this.

  7. #22
    us
    Commercial Diving Company Owner

    Feb 2005
    Eastern PA
    Garrett At Pro, MX500 Proton Mag fisher gold bug, whites PI, Garrett gold scorpion
    247
    186 times
    Prospecting
    got the pontoons bent up, only had the help from my son for a short time, so i got bent up what i could in that time

    also guess my bender didnt have tight enough tollerences when bending a full length piece, so they werent bending a full 90 degrees, i also think i need to add a 6 inch or so wide piece the full width behind the bending angle as it looked like the sheet was lifting up when we would get to 90 degrees with the handles. i think the longer flat surface would hold it better. i also noticed the top bar would bend upward when i tightened up the wedge bolts, so i need to make an arch across the full width with a upright in the middle and flush at the ends

    since they arent fully bent, ill just put the bulkheads in and pull them tight with pony clamps, then weld them up inside and out

    really hate when it turns them sideways here

    Click image for larger version. 

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ID:	1794890heres the 2 back pontoons
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ID:	1794891the first front pontoon bent, still have to bend the 45 degree bow up
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ID:	17948952nd pontoon
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ID:	1794896
    Last edited by njcommercialdiver; Jan 26, 2020 at 07:07 PM.
    Reed Lukens and N-Lionberger like this.

 

 
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