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Thinking of using a dado chipper for spline slots.

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Forum topic by tefinn posted 12-09-2013 12:23 AM 1566 views 0 times favorited 19 replies Add to Favorites Watch
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tefinn

1222 posts in 1897 days


12-09-2013 12:23 AM

Topic tags/keywords: question tablesaw

As the title says, I’m thinking of using a dado chipper to cut the spline slots in a mitered box I’m making. Ole butter fingers here dropped the only blade I had that made flat bottom slots. I broke off six of the teeth. Is it possible to use one of the chippers from my dado set to make the slots for the miter splines? Am I asking for trouble since they only have two teeth on them? It would only be for this one box til I can replace my blade. Any advice or comments greatly welcomed.

-- Tom Finnigan - Measures? We don't need no stinking measures! - Hmm, maybe thats why my project pieces don't fit.


19 replies so far

View JustJoe's profile

JustJoe

1554 posts in 1498 days


#1 posted 12-09-2013 12:26 AM

It won’t hurt the blade if that’s what you mean. Why not try it on a piece of scrap and see if tearout is an issue?

-- This Ad Space For Sale! Your Ad Here! Reach a targeted audience! Affordable Rates, easy financing! Contact an ad represenative today at JustJoe's Advertising Consortium.

View ChuckV's profile

ChuckV

2880 posts in 2987 days


#2 posted 12-09-2013 12:30 AM

Tom,

I have never tried using a chipper for cutting splines, but I use one of the outside blades from my dado set all the time. Of course, the outside blades have the little “bat ears”, but on my set they are so small that I don’t worry about it and it works fine.

You will certainly want to give it a test before cutting into the real thing.

Sorry to hear about your damaged blade. I’m glad you didn’t try to make a heroic save as it dropped – those things are sharp!

-- “Big man, pig man, ha ha, charade you are.” ― R. Waters

View kdc68's profile

kdc68

2526 posts in 1737 days


#3 posted 12-09-2013 12:43 AM

Sounds a bit scary to me…but can’t speak of experience. It may be alright if you can you take shallow passes until you reach the depth you want for splines…edit…My inexperienced best guess is you may have vibration on your table saw

-- Measure "at least" twice and cut once

View pintodeluxe's profile

pintodeluxe

4852 posts in 2273 days


#4 posted 12-09-2013 01:22 AM

I think manufacturers advise against anything but 2 outer blades, or 2 outer blades + chippers.
Best case scenario is a poor quality cut.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

View cabmaker's profile

cabmaker

1502 posts in 2269 days


#5 posted 12-09-2013 01:25 AM

I think i would abort it my friend.. Your box may be a small project with small pcs. This is where people get into trouble.

There are spline cutters for use in routers that have a small wingspan. Your dado set chippers may want to grab before you have time to react.
JB

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pintodeluxe

4852 posts in 2273 days


#6 posted 12-09-2013 01:30 AM

Get a replacement blade. Even a 7-1/4” cheap circ. saw blade could work.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

View bondogaposis's profile

bondogaposis

4020 posts in 1811 days


#7 posted 12-09-2013 01:38 AM

I think the 7 1/4 inch blade is much better idea, get a flat bottomed rip blade.

-- Bondo Gaposis

View rance's profile

rance

4245 posts in 2620 days


#8 posted 12-09-2013 01:47 AM

That is a very bad idea. The fewer the number of teeth, the more likely you are able to feed too fast. Some blades have tooth designs that prevent this with tabs sticking out just behind the blade. You just need to get yourself a new RIP blade. If you only use it for splines, then a cheap one from the BORG should do fine. You want a Rip blade to get the flat teeth. Please do not use your chipper. You are just asking for trouble.

Something else, your chipper & outside blades of most dado sets are likely wider than 1/8” so the teeth can overlap. If you are after exactly 1/8” slots, then you might be surprised by that as well.

-- Backer boards, stop blocks, build oversized, and never buy a hand plane--

View ShaneA's profile

ShaneA

6471 posts in 2058 days


#9 posted 12-09-2013 01:59 AM

Chipper or outside blade? I am a bit confused. I have used the outside blade before for this. The chipper…you are asking for trouble.

View tefinn's profile

tefinn

1222 posts in 1897 days


#10 posted 12-09-2013 02:04 AM

JustJoe – I’m not worried about damaging the chipper, more about is it safe.

ChuckV – Yeah, all my other blades and dado sides leave the bat ears on the side of the cut. Never had a chance to save the blade. Was gripping it between my thumb and fingers with my arm at my side when it slipped. Concrete floor and carbide teeth do not make a good combination.

kdc68 – I was thinking shallow passes also. Mostly worried about it grabbing and kicking back because of only having the two opposing teeth. No vibration with only the chipper.

cabmaker – I’m worried about it grabbing also. The box is 10×10 x 2-1/2

pintodeluxe + bondogaposis – A 7-1/4” blade is not a bad idea! I can get one of those tomorrow rather than waiting a week or more to replace my 10” blade.

Thanks all! I’m going to get a 7-1/4” combo tomorrow and try it out

-- Tom Finnigan - Measures? We don't need no stinking measures! - Hmm, maybe thats why my project pieces don't fit.

View kdc68's profile

kdc68

2526 posts in 1737 days


#11 posted 12-09-2013 02:07 AM

tefinn...Seems like its a consensus that it would be dangerous to use the chipper. Glad you will get a 7-1/4 to use

-- Measure "at least" twice and cut once

View tefinn's profile

tefinn

1222 posts in 1897 days


#12 posted 12-09-2013 02:09 AM

rance + ShaneA – You guy’s posted while I was typing. I didn’t think it was a great idea myself, that’s why I wanted some opinions before actually trying it. I should listen to the little voice in my head, “If it doesn’t seem safe , it probably isn’t!”. Thanks for the replies.

-- Tom Finnigan - Measures? We don't need no stinking measures! - Hmm, maybe thats why my project pieces don't fit.

View knotscott's profile

knotscott

7207 posts in 2835 days


#13 posted 12-09-2013 02:33 AM

Better to use a flat top grind (FTG) rip blade.

-- Happiness is like wetting your pants...everyone can see it, but only you can feel the warmth....

View tefinn's profile

tefinn

1222 posts in 1897 days


#14 posted 12-09-2013 02:46 AM

knotscott – You are correct. The blade I dropped was a Freud 24 tooth FTG ripping blade. But no one around me sells them so I need to order a replacement.

-- Tom Finnigan - Measures? We don't need no stinking measures! - Hmm, maybe thats why my project pieces don't fit.

View Gary's profile

Gary

8968 posts in 2893 days


#15 posted 12-09-2013 03:04 AM

I use one box joint blade quite often. Never had a problem

-- Gary, DeKalb Texas only 4 miles from the mill

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