Cutting speaker holes ?

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  • Cutting speaker holes ?

    Frustrating!!! Many said to use a jigsaw. I can’t get it to turn properly and it jams and bends blades. Anyone have any tips? Is there a special blade for cutting circles? It is a 5 3/8” inch diameter and I didn’t see a hole saw in that size.

    edit - I see I can order a hole saw in that size from Home Depot, I really don’t want to spend 70 bucks for a one time use….

  • #2
    I use one of these. On sale for $20 at Harbor Freight. Pick up extra blades, too. The “fine” metal blades leave a smooth finish in fiberglass.
    Assumes you have an air compressor.
    Click image for larger version

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    • #3
      Originally posted by Coastboater View Post
      I use one of these. On sale for $20 at Harbor Freight. Pick up extra blades, too. The “fine” metal blades leave a smooth finish in fiberglass.
      Assumes you have an air compressor.
      Click image for larger version

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      I do not but may be able to borrow one.

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      • #4
        Swinging a 5 3/8" hole saw takes a special person and drill.
        That air saw should do the trick.
        Engine Sales and Service
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        • #5
          Originally posted by Parker Yacht View Post
          Swinging a 5 3/8" hole saw takes a special person and drill.
          That air saw should do the trick.
          Yep, that puppy will break a wrist. I watched some guys with a 10” hole saw. Two handles and two guys!!
          I’ve also used a Dremel that worked well
          2022 34’ Fountain w/ trip 300 Mercs
          Fairhope & Orange Beach, AL

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          • #6
            Originally posted by Tiretyme View Post

            Yep, that puppy will break a wrist. I watched some guys with a 10” hole saw. Two handles and two guys!!
            I’ve also used a Dremel that worked well
            What bit for the dremel?

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            • #7
              An oscillating saw would also probably work just gotta take a slow and make many cuts.

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              • #8
                Originally posted by Pstephens46 View Post

                What bit for the dremel?
                Click image for larger version

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                This. Make sure you use the attachment that keeps it square to fiberglass if you can.
                Eye protection is imperative
                Ear plugs and a dust mask wouldn’t be bad idea either
                2022 34’ Fountain w/ trip 300 Mercs
                Fairhope & Orange Beach, AL

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                • #9
                  Originally posted by Pstephens46 View Post
                  Frustrating!!! Many said to use a jigsaw. I can’t get it to turn properly and it jams and bends blades. Anyone have any tips? Is there a special blade for cutting circles? It is a 5 3/8” inch diameter and I didn’t see a hole saw in that size.

                  edit - I see I can order a hole saw in that size from Home Depot, I really don’t want to spend 70 bucks for a one time use….
                  Use a jig saw blade made for cutting tile.

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                  • #10
                    Originally posted by Tiretyme View Post

                    Click image for larger version

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                    This. Make sure you use the attachment that keeps it square to fiberglass if you can.
                    Eye protection is imperative
                    Ear plugs and a dust mask wouldn’t be bad idea either
                    A cut out bit like that in a router with a compass attachment. Oh and add gloves to the personal safety gear...Charlie
                    Greetings from Lake Hopatcong NJ / Milltown NJ

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                    • #11
                      Originally posted by Mako runner View Post

                      A cut out bit like that in a router with a compass attachment. Oh and add gloves to the personal safety gear...Charlie

                      This. There is a cheap Ryobi drywall rotary saw that comes with the compass attachment. Go slow with slight pressure and change the blades as needed.
                      Barefoot Boats
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                      • #12
                        Tape off surface with blue tape and use a new fine-toothed DOWNWARD cutting laminate blade and you'll be fine!

                        Trust me ... c'mon man! You'll thank me...
                        Life is too short for an ugly boat!

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                        • #13
                          Roto zip.

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                          • #14
                            Originally posted by Coastboater View Post
                            I use one of these. On sale for $20 at Harbor Freight. Pick up extra blades, too. The “fine” metal blades leave a smooth finish in fiberglass.
                            Assumes you have an air compressor.
                            Click image for larger version

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Views:	107
Size:	127.7 KB
ID:	148970
                            Best $20 I ever spent. Works like a champ. Super high speed action with the short stroke makes it very easy to turn. Only may jam if compressor runs low on air. 20 gallon compressor is about as small as you can go with this thing.
                            Thanks for everyone’s input.

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