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Dado blade set for Craftsman 21805 TS

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Forum topic by superstretch posted 01-30-2011 07:48 AM 2603 views 0 times favorited 11 replies Add to Favorites Watch
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superstretch

1530 posts in 2155 days


01-30-2011 07:48 AM

Topic tags/keywords: question tablesaw

Hi all, I have a Craftsman 21805 10” table saw and am looking for a dado blade set. From a review I found, it said to use up to a 6” set with a 5/8” arbor. Is there any reason why not to use a 7”? It seems maybe the extra mass spinning around might be the only concern and there’s a guy on craigslist down the road that has a carbide tipped 7” set for cheap. I’m not looking for anything serious, just need to do the odd dado cut when needed.

Any advice?

Thanks

-- Dan, Rochester, NY


11 replies so far

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Lee Barker

2170 posts in 2312 days


#1 posted 01-30-2011 04:30 PM

Something about “7 inch dado” didn’t ring right with me. I Googled, and all the 7s I came up with were wobblers. I think they are 7 because they were invented by a guy who made 7” Skilsaw blades and just adapted his equipment.

So I could be wrong here, and I’m eager to find out either way, but it seems to me a 7” wobble would be fine on your 10 inch saw.

That said, wobble blades are pretty crude cutters compared to what you get with a good stacked set. If tearout and and unflat-bottomed dado are no concern, then it would be a fine deal. If those things will bother you, perhaps you’ll want to shop elsewhere.

-- "...in his brain, which is as dry as the remainder biscuit after a voyage, he hath strange places cramm'd with observation, the which he vents in mangled forms." --Shakespeare, "As You Like It"

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Lee Barker

2170 posts in 2312 days


#2 posted 01-30-2011 04:35 PM

I just Googled “wobble dado patent” and discovered that indeed the critter was patented by Fred Gunzner who was my business neighbor for years and for whom I did a passel of woodworking for personal stuff as well as things for his office.

Sorry for this diversion from the OP, but the flood of memories was rather large. Fred moved to another state around ten years ago and died maybe three back.

Now back to dadoes in the general sense.

-- "...in his brain, which is as dry as the remainder biscuit after a voyage, he hath strange places cramm'd with observation, the which he vents in mangled forms." --Shakespeare, "As You Like It"

View CharlieM1958's profile

CharlieM1958

16241 posts in 3680 days


#3 posted 01-30-2011 04:55 PM

Dan, I would definitely make sure it is a stack dado and not a wobble. I think a 6” set is the best bet for a smaller saw (less mass, as you noted), and you can get a good one for under $80. I recommend the Oshlun set reviewed here. The quality of cut is fantastic.

-- Charlie M. "Woodworking - patience = firewood"

View RetiredCoastie's profile

RetiredCoastie

999 posts in 2644 days


#4 posted 01-30-2011 05:55 PM

Charlie M. thanks for the link. Do you know if the 8” version performs as well as the 6”? I don’t have any experience with Oshlun products.

Dan here is an article that has some good info and it illustrates what Charlie M. recommends.
http://www.woodsmithshop.com/download/107/107-dadoblades.pdf
click on the PDF file page 1 on the left of the page.

You may have to register to view it but it’s free and there are some good articles in the projects section.

Also Rockler has a 20% sale on now through the 6th of February which should bring the 6” Olshun down to about $65.00 and they do honor the discounts in store if you have one nearby.

-- www.thepatriotwoodworker.com Proud Supporter of Homes For Our Troops

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patcollins

1420 posts in 2327 days


#5 posted 01-30-2011 07:05 PM

There also could be a clearance issue inside of the saw with an 8” stack. If you end up putting one on make sure there isnt a clearance issue first, I could see that getting ugly.

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Carl Webster

82 posts in 2260 days


#6 posted 01-30-2011 07:38 PM

The diameter of the dado blades is limited by the horsepower of the table saw motor. Since the dado blades are cutting a wider path through the wood than the regular saw blade the recommended diameter of the dado blade is smaller.

-- Carl in SC

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superstretch

1530 posts in 2155 days


#7 posted 01-30-2011 07:52 PM

Thanks everyone for the input. I believe this is what the seller has available

-- Dan, Rochester, NY

View Lee Barker's profile

Lee Barker

2170 posts in 2312 days


#8 posted 01-30-2011 09:46 PM

Ok, so I’m having a learning—there are 7” stacked sets. This looks like it could be ideal for you. They’re not carbide, and longevity isn’t something you’re concerned about.

The only issue of concern is sharpness. If they show signs of pitch buildup hence overheating, or worse, know that sharpening is critical (to get flat bottomed dadoes) hence takes some $ to accomplish.

There will be no clearance issues since you have a 10” saw.

Onward!

Kindly,

Lee

-- "...in his brain, which is as dry as the remainder biscuit after a voyage, he hath strange places cramm'd with observation, the which he vents in mangled forms." --Shakespeare, "As You Like It"

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CharlieM1958

16241 posts in 3680 days


#9 posted 01-30-2011 09:55 PM

Dan, if it’s a really good price, go ahead and give it a shot.

-- Charlie M. "Woodworking - patience = firewood"

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superstretch

1530 posts in 2155 days


#10 posted 01-30-2011 11:19 PM

Actually I was over at my parents for lunch today and found a set of 6” carbide tipped in a shop drawer. Talk about good timing :)

-- Dan, Rochester, NY

View Lee Barker's profile

Lee Barker

2170 posts in 2312 days


#11 posted 01-31-2011 02:25 AM

Groovy. Both meanings.

-- "...in his brain, which is as dry as the remainder biscuit after a voyage, he hath strange places cramm'd with observation, the which he vents in mangled forms." --Shakespeare, "As You Like It"

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