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What is the best way to cut a 4-1/16" diameter inlay?

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Forum topic by mahdee posted 02-11-2016 06:01 PM 543 views 0 times favorited 12 replies Add to Favorites Watch
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mahdee

3615 posts in 1306 days


02-11-2016 06:01 PM

Topic tags/keywords: question walnut drill press router blade shaping

Hi,
Curious to know how to make an inlay about 3/16” deep and 4-1/16” in diameter.
Thanks

-- earthartandfoods.com


12 replies so far

View Rick  Dennington's profile

Rick Dennington

5301 posts in 2733 days


#1 posted 02-11-2016 06:57 PM

I would prolly use a plunge router, and a flat bottom cutting bit, or an upcut spiral bit…..maybe a 3/16” ,or 1/4”

-- Here in the South, we say "down the road a piece"...and , "it's over yonder".....!!

View shampeon's profile

shampeon

1771 posts in 1722 days


#2 posted 02-11-2016 07:05 PM

Circle cutter and a drill press?
http://www.amazon.com/General-Tools-Instruments-55-Adjustable/dp/B00004T7P1

-- ian | "You can't stop what's coming. It ain't all waiting on you. That's vanity."

View MadMark's profile

MadMark

979 posts in 992 days


#3 posted 02-11-2016 07:30 PM

Actually both are right. Start with the flycutter to define the circumference. Then use the router to clear the center. The circumference cut makes it easy to freehand the center because you don’t have to be precise following the line.

M

-- Madmark - Madmark2150@yahoo.com Wiretreefarm.com

View distrbd's profile

distrbd

2242 posts in 1985 days


#4 posted 02-11-2016 07:38 PM

I would make a router temple ,use an inlay bushing,if the size of the template is correctly calculated it should give you exactly 4.1/16”.

-- Ken from Ontario, Canada

View mahdee's profile

mahdee

3615 posts in 1306 days


#5 posted 02-11-2016 07:43 PM

Thanks guys. I just bought a adjustable fly cutter at HD with two blades. I am thinking of using it to cut a template in which I can use my router guide to clean out the whole thing. I just need to figure out how much bigger the templet needs to be to allow for the guide thickness and router bit clearance.

-- earthartandfoods.com

View HokieKen's profile

HokieKen

2212 posts in 677 days


#6 posted 02-11-2016 07:44 PM

I’m with Mark for a 1-off. If you’re doing more than 1, I’d follow Ken’s advice with the template.

-- Kenny, SW VA, Go Hokies!!!

View MrUnix's profile

MrUnix

4700 posts in 1738 days


#7 posted 02-11-2016 07:50 PM

I just need to figure out how much bigger the templet needs to be to allow for the guide thickness and router bit clearance.
- mahdee

The template needs to be offset by:
(Bushing diameter – bit diameter) / 2

See this article at Wood magazine: Understanding Guide Bushings

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

View mahdee's profile

mahdee

3615 posts in 1306 days


#8 posted 02-11-2016 07:59 PM

Thanks Brad. Ken, I must have read your mind.

-- earthartandfoods.com

View Rick  Dennington's profile

Rick Dennington

5301 posts in 2733 days


#9 posted 02-11-2016 08:19 PM

Uh oh…..I just went back and re-read the thread, and my post….I forgot to include using a guide bushing…..or inlay bushing….A template would make it so much easier if you had several, or a big run to do….I need to slow down…..!!!

-- Here in the South, we say "down the road a piece"...and , "it's over yonder".....!!

View CFrye's profile

CFrye

9018 posts in 1379 days


#10 posted 02-12-2016 12:21 PM

And, Mahdee, please turn the speed way down on your drill press when you use that fly cutter! Parts can FLY off that thing!

-- God bless, Candy

View Tennessee's profile

Tennessee

2433 posts in 2053 days


#11 posted 02-12-2016 12:30 PM

Honestly, never seen, owned or found a fly cutter that I liked or was comfortable with.
Hard to make absolutely sure that both cutters are exactly the same penetration distance.
As Candy correctly said, they can
“fly” apart and the cutters can come loose when they hit a harder bit of the wood.
When they dull, they cut poorly.
Make sure your wood is securely tagged down, and you drill table locked tight. Lots of torque.
Not a fan…

I like the router idea much better, possibly just hand cutting in the final edges with small, very sharp chisels. That is how I inlay my guitar pickguards into my bodies. Of course, they are not round.

-- Paul, Tennessee, http://www.tsunamiguitars.com

View waho6o9's profile

waho6o9

7408 posts in 2116 days


#12 posted 02-12-2016 01:52 PM

Please take to heart Candys’ and Pauls’ sage advice Mahdee, we need you around for a long time.

http://lumberjocks.com/reviews/3636

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