miranthis Posted September 23, 2016 Report Share Posted September 23, 2016 I need to make a shallow 3 inch round hole in a board and I thought about using a router with a pattern bit. But, how do I make the perfect circle pattern? I can make square and rectangular patterns all day, but I need the circle to be perfect. most of the web examples show a jig for cutting larger circles, say 6 inch or larger. TIA, Jeff-in-KC Quote Link to comment Share on other sites More sharing options...
rodger. Posted September 23, 2016 Report Share Posted September 23, 2016 4 minutes ago, miranthis said: I need to make a shallow 3 inch round hole in a board and I thought about using a router with a pattern bit. But, how do I make the perfect circle pattern? I can make square and rectangular patterns all day, but I need the circle to be perfect. most of the web examples show a jig for cutting larger circles, say 6 inch or larger. TIA, Jeff-in-KC Forstner bit or hole saw. Quote Link to comment Share on other sites More sharing options...
miranthis Posted September 23, 2016 Author Report Share Posted September 23, 2016 Just need to make a recess for a scout patch in a plaque, probably 1/8 inch into the board. I've done this with Forstner bits for challenge coins, but this is substantially larger for a round position patch and also a larger troop neckerchief patch. Also, I'd like to learn the trick to making the pattern out of MDF so I can also to ovals, pie slice shapes etc. and not just buy multiple $30+ bits I may only use once. Thanks though. Jeff-in-kc Quote Link to comment Share on other sites More sharing options...
xxdabroxx Posted September 23, 2016 Report Share Posted September 23, 2016 Jig saw and sander would be your next option to go bigger than the forstner bits. Quote Link to comment Share on other sites More sharing options...
Immortan D Posted September 23, 2016 Report Share Posted September 23, 2016 Take a look at this router jig: https://www.amazon.com/dp/B00009K77D/ref=cm_sw_r_taa_ZSA5xb2TSGME0 Quote Link to comment Share on other sites More sharing options...
Keggers Posted September 23, 2016 Report Share Posted September 23, 2016 You might try this router jig from Rockler - http://www.rockler.com/circle-grommet-templates Quote Link to comment Share on other sites More sharing options...
gee-dub Posted September 24, 2016 Report Share Posted September 24, 2016 This is very close to a recent thread but, I couldn't dig it up. The jasper jigs are certainly versatile if you will be doing a lot of different sizes often enough to warrant storing it. For a one-off I would cut a hole in some 1/2" ply with a circle cutter (yes, you have to store that too ) and use a bearing guided bit or a template guide. Quote Link to comment Share on other sites More sharing options...
Eric. Posted September 24, 2016 Report Share Posted September 24, 2016 Yeah I'd use a circle cutter too. Unless you have a hole-saw that size. There is no "one-size fits all" type of technique to making templates...you have to have a starting point for every shape out there. The reason you only see 6" and larger hole templates being made with a router is because you can't make them any smaller due to the size of the router base. Maybe with a trim router you could manage a tiny bit smaller. Otherwise buy one of these... http://www.leevalley.com/US/wood/page.aspx?p=32275&cat=1,180,42316 Quote Link to comment Share on other sites More sharing options...
Immortan D Posted September 24, 2016 Report Share Posted September 24, 2016 22 minutes ago, Eric. said: The reason you only see 6" and larger hole templates being made with a router is because you can't make them any smaller due to the size of the router base. The jasper one I linked can cut circles starting a 1" diameter. Quote Link to comment Share on other sites More sharing options...
Eric. Posted September 24, 2016 Report Share Posted September 24, 2016 1 minute ago, Immortan D said: The jasper one I linked can cut circles starting a 1" diameter. Dang, cool. Missed that altogether. I should buy one. Yeah, I should. Quote Link to comment Share on other sites More sharing options...
Immortan D Posted September 24, 2016 Report Share Posted September 24, 2016 6 minutes ago, Eric. said: Dang, cool. Missed that altogether. I should buy one. Yeah, I should. Nah you don't need one. Neither do I, with all those forstner bits we have lying around. Quote Link to comment Share on other sites More sharing options...
Eric. Posted September 24, 2016 Report Share Posted September 24, 2016 Just now, Immortan D said: Nah you don't need one. Neither do I, with all those forstner bits we have lying around. Right. And that's the same reason that the circle cutter is a more versatile addition to a bit collection...if I need a circle that's 2-5/64"....I can make one. 1 Quote Link to comment Share on other sites More sharing options...
wtnhighlander Posted September 24, 2016 Report Share Posted September 24, 2016 Its not too hard to cut an imperceptibly imperfect circle for your template using a scroll saw and a spindle sander. Quote Link to comment Share on other sites More sharing options...
Immortan D Posted September 24, 2016 Report Share Posted September 24, 2016 I have a drywall circle cutter, I wonder if it's possible to make router templates with drywall lol Quote Link to comment Share on other sites More sharing options...
miranthis Posted September 25, 2016 Author Report Share Posted September 25, 2016 I will be using a trim router and I have done irregular shapes freehand, but thought a pattern bit would work better for a regular shape. I have made mortise templates, just not something round. Whatever solution I come up with will need to be non-maring so probably a clamp on deal. Measured the larger of the two patches I need to recess for and it is 3 & 7/8 inch across. Appreciate the input. Quote Link to comment Share on other sites More sharing options...
wouldwurker Posted September 25, 2016 Report Share Posted September 25, 2016 . Cut your hole oversized in 1/4" ply. Then offset the difference with a bushing. Be careful with the wheel and circle cutter...it's a terrifying tool. After lots of test pieces, double stick tape or clamp to your workpiece. Make copious notes on your template. Quote Link to comment Share on other sites More sharing options...
drzaius Posted September 25, 2016 Report Share Posted September 25, 2016 If you get the circle cutter from Lee Valley, be sure to use it in a drill press & clamp the work piece securely. Quote Link to comment Share on other sites More sharing options...
Tom Cancelleri Posted September 26, 2016 Report Share Posted September 26, 2016 Everything Vinny said! I had a fly cutter I was going to use to cut my sound hole on a guitar I built. Fly cutters are both dangerous and scary. They all have that "Made in China for mass export" feel to them. I personally would go with something like this for ease of use and the ability to do multiple sizes using a guide bushing and a 1/2" spiral bit https://www.amazon.com/Router-Circle-Template-Peachtree-Woodworking/dp/B003UO676O Quote Link to comment Share on other sites More sharing options...
Popular Post drzaius Posted September 26, 2016 Popular Post Report Share Posted September 26, 2016 I have a love/scared-to-death relationship with my fly cutter. Sometimes you need a precisely hole of an odd size & this will do a great job. But you've gotta use every safety rule in the book when using one. Not for the faint of heart. 3 Quote Link to comment Share on other sites More sharing options...
wdwerker Posted September 27, 2016 Report Share Posted September 27, 2016 +1 on the scary fly cutter ! Practice and using MDF for your template is quite helpful. Rub some glue into the edge of the MDF to harden it & reduce wear from bearings. Never try one of these unless you are using a drill press. Clamped down workpieces, slow feed rate and a tightly puckered backside are prerequisites ! 2 Quote Link to comment Share on other sites More sharing options...
treeslayer Posted September 28, 2016 Report Share Posted September 28, 2016 yep to what everyone has said, i had a friend make me one with a carbide cutter and it works great if used properly, but clamp that thing down! if you don't its like a wood grenade going off on the drill press, trust me i know Quote Link to comment Share on other sites More sharing options...
woodbutcher74 Posted September 28, 2016 Report Share Posted September 28, 2016 Try drilling a hole with a forstner bit. Then use a rabbeting bit to enlarge the hole part way through. Switch to a patterning bit to bring the rest of the depth to the same diameter. Repeat as necessary to get you hole to the right size. Perfect hole every time. Quote Link to comment Share on other sites More sharing options...
cease232 Posted September 29, 2016 Report Share Posted September 29, 2016 I made this simple jig to route small circles for Christmas gifts. Not pretty but it worked perfect, and didn't take much time to construct. Hard to see but there's a small nail protruding through the base. The jig could route circles smaller than 1". Jeremiah Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
lewisc Posted September 29, 2016 Report Share Posted September 29, 2016 On 9/28/2016 at 11:33 AM, woodbutcher74 said: Try drilling a hole with a forstner bit. Then use a rabbeting bit to enlarge the hole part way through. Switch to a patterning bit to bring the rest of the depth to the same diameter. Repeat as necessary to get you hole to the right size. Perfect hole every time. Skip to 17mins. Quote Link to comment Share on other sites More sharing options...
woodbutcher74 Posted September 29, 2016 Report Share Posted September 29, 2016 lewisc, thanks for posting the video. I wasn't sure if my explanation made any sense. Quote Link to comment Share on other sites More sharing options...
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