Special Grind Box Joint Blade

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Forum topic by RandyinFlorida posted 05-16-2016 02:15 PM 701 views 0 times favorited 10 replies Add to Favorites Watch
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181 posts in 1535 days

05-16-2016 02:15 PM

Topic tags/keywords: box joints saw blades table saw incra i-box i_box flat ground raker tablesaw

The Incra I_Box User’s Manual suggests “You can cut delicate 1/8” box joints using standard 1/8” kerf table saw blades, but you’ll want to choose a blade that features a flat ground raker tooth or a special box joint grind like
those from Forrest and Ridge Carbide.”

These blades are pretty expensive; ranging from $89 for a 6” blade on up to $2-300. Anybody have an alternative? Of course my Big Box store has nothing. They all leave a rounded, high in the middle, bottom.

Yes, most men want a nice rounded bottom. But I need mine flat. lol

-- Randy in Crestview Florida, Wood Rocks!

10 replies so far

View Picklehead's profile


1018 posts in 1396 days

#1 posted 05-16-2016 04:57 PM

How about a 4 winged chipper from a dado set? I frequently use mine (Freud 4 wing) to cut flat-bottomed grooves without using the outside blades. For example, the grooves in the Quoridor board.

-- You've got to be smarter than the tree.

View bbasiaga's profile


757 posts in 1462 days

#2 posted 05-16-2016 05:28 PM

My brother just bought a two blade box joint set for I think $99 from Woodcraft. A Freud I think.


-- Part of engineering is to know when to put your calculator down and pick up your tools.

View BigYin's profile


347 posts in 1883 days

#3 posted 05-16-2016 05:47 PM

Phone a saw sharpener and ask if they can recut the teeth of a blade to flat top instead of raked

-- ... Never Apologise For Being Right ...

View bandit571's profile (online now)


14636 posts in 2150 days

#4 posted 05-16-2016 06:10 PM

Backsaw and the right sized chisel….

-- A Planer? I'M the planer, this is what I use

View DirtyMike's profile


464 posts in 369 days

#5 posted 05-16-2016 06:10 PM

how about a flat top ground ripping blade?

View HorizontalMike's profile


7160 posts in 2381 days

#6 posted 05-16-2016 06:24 PM

how about a flat top ground ripping blade?
- DirtyMike

BINGO! I was just thinking about my 24T Freud. IMO, the answer… 8-)

-- HorizontalMike -- "Woodpeckers understand..."

View Rentvent's profile


148 posts in 316 days

#7 posted 05-16-2016 06:27 PM

Flat Tooth Grind saw blade

Be careful to get one that is truly FTG on all teeth – not a combination FTG blade.

View HorizontalMike's profile


7160 posts in 2381 days

#8 posted 06-10-2016 11:40 PM

Personally, I ended up with the Freud Box Cutter Blade:

Not ready for dovetail joints, but this is an easy alternative and actually just as strong in joining.

-- HorizontalMike -- "Woodpeckers understand..."

View DanielP's profile


489 posts in 1359 days

#9 posted 06-12-2016 04:31 PM

Infinity makes a .125 kerf flat grind listed for 49.90 in the latest catalogue they sent. They also have 8” .156” kerf and .250” kerf flat grind.

I have the .156 and am very happy with it, as opposed to the Forrest 3/16”/3/8” box joint set which chipped a tooth and rusted badly

-- --- Dan

View xeddog's profile


117 posts in 2474 days

#10 posted 06-13-2016 04:45 PM

I was at a woodworking show in Sacramento years ago, and Forrest had a booth there. One of their show specials was a WoodWorker II blade with a special grind for box joints, so I bought one. If anyone is interested, I think you can still order the WWII with special grind #1.


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