cutting good circles

[taintedplay 10+ year member]

how do you guys go about drawing the circles on your wood and then cutting them out perfectly? jigsaw?

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[wu501 10+ year member]

router and a circle jig

 

[Rashaddd 5,000+ posts]

^ or a ruler and nail, just cut a little slot in the end of the ruler for a pen/pencil to sit in, nail it down through the radius you want where the center of the circle should be, spin it around and you've got a perfect circle drawn out, cut out with a jigsaw.

 

[boomzilla 10+ year member]

^ or a ruler and nail, just cut a little slot in the end of the ruler for a pen/pencil to sit in, nail it down through the radius you want where the center of the circle should be, spin it around and you've got a perfect circle drawn out, cut out with a jigsaw.

That's exactly how I do it.

 

[taintedplay 10+ year member]

cool. ill do that ruler idea then. thanks!

also, i think i made the cuts a little too big for my 12s, am i able to cut a square hole in the baffle and then build another ontop of that? it would add some volume but it shouldent be much at all

 

[alvitae 10+ year member]

Here is a cool trick to finding the center of a circle.

http://www.mathopenref.com/constcirclecenter2.html

 

[Rashaddd 5,000+ posts]

cool. ill do that ruler idea then. thanks!also, i think i made the cuts a little too big for my 12s, am i able to cut a square hole in the baffle and then build another ontop of that? it would add some volume but it shouldent be much at all

Yup...you dont need to cut it into a square either just cut a square and put it on top of it, or just make a whole extra baffle

 

[z0n3d0u7 10+ year member]

I use a "Large pole compass" i picked up from Lowes for $9. Works wonders

 

[sqhertz 5,000+ posts]

i take a scrap of wood. preferably 1" wide and however long. screw on one side , and measure from there. drill a hole at your desired diameter for pen/pencil. spin in circle.

i usually save the scrap and mark the size it is , but i havnt build anything latly. so i trashed all mine.

 

[pentavolvo 10+ year member]

i take a scrap of wood. preferably 1" wide and however long. screw on one side , and measure from there. drill a hole at your desired diameter for pen/pencil. spin in circle.i usually save the scrap and mark the size it is , but i havnt build anything latly. so i trashed all mine.

i do same but at desired diameter i shoot a screw through and use that to mark the circle and it cuts a slight groove in the wood and jigsaw will follow it very nicely

 

[scoob8000 10+ year member]

Hunt down a cheap used router on ebay and build your own circle jig.

It's worth every penny, plus there are so many other uses for a router!

 

[taintedplay 10+ year member]

if im doing a cover baffle like i mentioned earlier, i dont want to have to buy another 4x8 peice of mdf, but i have stuff like plywood and pine and such laying around, can i use that?