Bast Dado Blade Sets Of 2021: Review & Buying Guide

Best table saw dado blade set review

Looking for a quick answer? Oshlun SDS-0842 is the best dado blade set you can buy. Keep reading on to find out why.

Having a dado-capable saw is a bonus for woodworkers wishing to move beyond basic carpentry. Yet, how do you select the best dado blade set? We will review available dado blade sets and suggest which we consider to offer the best value, quality, and capability.

When I began my woodworking career, I used my table saw, or circular saw, to cut dados. It worked after a fashion, but the time taken to set up, the accuracy achieved, and the cleanliness of the finished joint left a lot to be desired. It wasn’t until I bought my first dado blade set that I realized just how much time I saved and how better the quality was of the finished product. In this review, I aim to guide your buying decision to purchase a quality product that suits your budget and woodworking needs.

We looked at six different dado blade sets available on the market, and the Oshlun SDS-0842 takes the crown. Stay with us for a few minutes, and we’ll discuss what to look for and why we chose this particular product.

Top-Rated Dado Blades Compared

Thumbnail
Best Dado Blade
Oshlun SDS-0842 8-Inch 42 Tooth Stack Dado Set...
The Runner-Up
DEWALT Dado Blade Set, 8-Inch, 24-Tooth (DW7670)
Premium Price
Freud 8" x 24T Super Dado Sets (SD508)
Budget Option
Freud 6" x 10T Pro Dado Set (SD206)
Title
Oshlun SDS-0842 8-Inch 42 Tooth Stack Dado Set...
DEWALT Dado Blade Set, 8-Inch, 24-Tooth (DW7670)
Freud 8" x 24T Super Dado Sets (SD508)
Freud 6" x 10T Pro Dado Set (SD206)
Diameter
8"
8"
8"
6"
Number of Teeth
42
24
24
10
Chipper Construction
Full body
Four-legged
Four-legged
Two-legged
Arbor Diameter
5/8"
5/8"
5/8"
5/8"
Client Rating
Prime
Best Dado Blade
Thumbnail
Oshlun SDS-0842 8-Inch 42 Tooth Stack Dado Set...
Title
Oshlun SDS-0842 8-Inch 42 Tooth Stack Dado Set...
Diameter
8"
Number of Teeth
42
Chipper Construction
Full body
Arbor Diameter
5/8"
Client Rating
Prime
Learn More
The Runner-Up
Thumbnail
DEWALT Dado Blade Set, 8-Inch, 24-Tooth (DW7670)
Title
DEWALT Dado Blade Set, 8-Inch, 24-Tooth (DW7670)
Diameter
8"
Number of Teeth
24
Chipper Construction
Four-legged
Arbor Diameter
5/8"
Client Rating
Prime
Learn More
Premium Price
Thumbnail
Freud 8" x 24T Super Dado Sets (SD508)
Title
Freud 8" x 24T Super Dado Sets (SD508)
Diameter
8"
Number of Teeth
24
Chipper Construction
Four-legged
Arbor Diameter
5/8"
Client Rating
Prime
Learn More
Budget Option
Thumbnail
Freud 6" x 10T Pro Dado Set (SD206)
Title
Freud 6" x 10T Pro Dado Set (SD206)
Diameter
6"
Number of Teeth
10
Chipper Construction
Two-legged
Arbor Diameter
5/8"
Client Rating
Prime
Learn More

Buying Considerations

To be sure you buy the correct product, here are some checks you need to do before reaching for your wallet.

  • Read your table saw instruction manual and check that your saw is compatible with dado blades. Not all saws offer this functionality.
  • Your manual should also tell you the diameter of the table saw arbor or motor shaft. 
  • Check the maximum width of dado blades you can fit to your saw. The arbor is a specific length, and if you were to fit dados that were too thick, the nut holding the blades would not engage sufficiently or safely with the arbor thread. There is so much mass in a dado stack, you do not want the blades coming loose while in use. Again, your saw manual will have this information.
  • For hobbyist woodworkers, dado blade sets come in three diameters, 6, 8, or 10-inches. Your manual will specify a maximum diameter for your saw. Lower powered saws will generally only accept the smaller diameters.
  • The throat plate is the plate set into the table saw through which your normal blade passes. It is held in place by screws, and the slot is just big enough to accommodate your normal blade. If not supplied with your saw, you may need to purchase a throat plate specifically designed for dado blade sets.
  • Just because your table saw can take a 10-inch or 8-inch blade, it doesn’t mean you need to buy the same diameter dado blade set. The critical point is the depth of dado you will be cutting. If you never cut dados deeper than 1 inches, you may find a 6-inch diameter dado blade is all you’ll need. Selecting the smallest diameter for your needs saves you money and reduces wear on your table saw, avoiding flinging around the larger mass of 8 or 10-inch diameter dado blade.

The Best Dado Blade Sets to Buy

Best Dado Blade Set – Oshlun SDS-0842

On Sale
Oshlun SDS-0842 8-Inch 42 Tooth Stack Dado Set...
  • Professional grade C-4 carbide
  • Full body chippers
  • Precision ground carbide tips

OVERVIEW

The Oshlun SDS-0842 dado blade stack takes the top spot because you’re getting a lot of kit for your money. The price of this set is budget-friendly, yet the quality of both the set and the cut it makes is excellent. Owners’ reports are overwhelmingly positive on build quality and dado cleanliness.

You’re getting 42 tooth outer saw blades and six tooth chippers. In my book, more teeth mean better quality cuts, and owners report a really clean base and sides to the dado. While all sets reviewed here are carbide tipped, the Oshlun set looks solid, with large precision ground carbide. This set cuts from 1/4-inch to 29/32-inch dados.

PROS

  • 42-tooth outer blades give the dado a high-quality cut and cleaner bottoms.
  • Well engineered, with quality workmanship.
  • Full-blade inner cutters
  • Excellent low price

CONS

  • This dado blade set produces small scores in each dado corner to eliminate tear-out, which is ideal for dados. Yet, these scores will be evident if you use this set for rabbets or box joints.

Runner Up – DEWALT DW7670 Stacked Dado Blade Set

DEWALT Dado Blade Set, 8-Inch, 24-Tooth (DW7670)
  • Heavy gauge, laser cut plates provide true, accurate cuts
  • Micro-grain carbide teeth deliver clean cuts and reduce splintering
  • 4-tooth chippers give smooth, flat bottom cuts

OVERVIEW

Dewalt is a well-known and respected manufacturer, producing good quality, fit-for-purpose equipment. This dado blade set doesn’t disappoint on quality; both the set and the box it comes in are excellent.

Where it lost points was in the pricing. It’s well over twice the price of the Oshlun dado blade set, and the Oshlun set is arguably giving you more metal for your money. The DW7670 set uses 24-tooth outer blades and 4-tooth chippers. My personal preference is for full-blade cutters. With that said, I like the Dewalt set, and if money were not a concern, It would certainly find a home in my workshop.

PROS

  • Great storage box provided with the set
  • Good quality engineering
  • Backed by a reputable manufacturer

CONS

  • A bit pricey
  • Owners have reported the odd manufacturing quality issue, but Dewalt quickly resolved them.

Freud 8″ x 24T SD508 Super Dado Blade Set

Freud 8' x 24T Super Dado Sets (SD508)
  • 8" Dado Set, 5/8" Arbor
  • Set includes 2 blades, 6 chippers, shim set and carrying case.
  • Features Premium TiCo HI-Density Carbide Crosscutting Blend for Maximum Performance

OVERVIEW

Freud is a manufacturer of industrial saw blades, and they produce a wide range of dado blade sets. They have a proprietary coating on their dado blades and their own carbide tips of a titanium cobalt carbide material. Freud claims these refinements reduce the rate at which the tips wear.

Price-wise, this set sits between the Oshlun and the Dewalt set. The outer blades on the Freud SD508 have 24 teeth, and the chipper blades are four-legged eight tooth blades. Freud claims that their blade arrangement creates cleaner edges, square shoulders, and flatter bottoms to the dado than their competitors’ products. They also claim that their dado blade set incorporates teeth designs that prevent kickback.

PROS

  • Anti-kickback design
  • Useful storage case
  • Reputable manufacturer of saw blades
  • Proprietary carbide tips offer reduced wear

CONS

  • Higher price tagĀ 
  • Labeling for chipper blades thicknesses is poor

Best 6 Inch Dado Blade Set – Freud 6″ x 10T SD206

Freud 6' x 10T Pro Dado Set (SD206)
  • 6" Dado Set, 5/8" Arbor
  • Set includes 2 blades, 3 chippers, spacers, shim set and carrying case.
  • Negative hook angles

OVERVIEW

If price is an issue, but Freud is your preferred manufacturer, here’s a set to make you smile. The SD206 is a 6-inch version of the above set. It incorporates many of the same features, including the same proprietary carbide tip and coating technology. The price of this set is still a little bit higher than the Oshlun 8-inch set we chose as the best, but if you have an allegiance to Freud, this isn’t a bad price.

The outer blades have 10-teeth, compared to the 24-teeth on the 8-inch set above. The chippers are also two-bladed versus the four-bladed ones in the 8-inch set. I’m presuming this is to suit lower-powered saws, while lowering costs. You also get only three chippers in this set, limiting your dado range from 1/4-inch to 7/8-inch in 1/16-inch increments.

PROS

  • Great price for a dado blade
  • Anti-kickback design
  • Useful storage case
  • Reputable manufacturer of saw blades
  • Proprietary carbide tips offer reduced wear

CONS

  • Having only three chippers limits the dado width to 7/8-inch.

Mibro 8″ x 24T 8416381 Carbide Stacking Dado Blade SetĀ 

On Sale
The Mibro Group 416381 8' Carbide Stacking Dado...
  • Cuts smooth and precise grooves with clean edges, square shoulders and flat bottoms
  • Set includes two 8" outer blades, five two-wing chippers and seven metal shims for fine adjustments
  • Slot widths range from 1/4" to 13/16", in 1/16" increments

OVERVIEW

This set is a truly budget price for dado blades, offering 2 x 24-tooth outer blades and five two-wing chippers. The dado width ranges from 1/4-inch to 13/16-inch in 1/16-inch increments. It comes in a hard plastic case ideal for storage.

This dado blade set has had mixed reviews from owners; some love them and get excellent dado quality, others claim the quality of the cut is uneven. A lot will depend on the power and size of your saw and your expectations of quality. If you want cabinet-maker quality dados, you might want to spend a little more on a professional set. Yet, this set seems adequate for general hobby work.

PROS

  • Great price for a dado blade set
  • Excellent case for storage
  • German welded carbide tips

CONS

  • Variable quality cuts reported by owners
  • Two-winged chippers
  • The quality of the blade material is budget

Freud SD208S 8″ x 12T Stacked Dado Blade Set

Freud 8' Stacked Dado Set for All Saws (SD208S)
  • 8" Dado Set, 5/8" Arbor
  • The set includes 2 blades, 3 chippers, 3 spacers and a shim set for micro adjustability
  • Negative hook angles

OVERVIEW

Freud has targeted the budget-conscious hobbyist with this dado blade stack. The outer blades have 12-teeth, and the chippers are two-winged blades with one tooth per wing. As far as the technology used in this set, it has all Freud products’ standard coating and carbide tips. Where Freud is saving money to offer this price is the two-winged chippers and the fewer teeth on the dado blades.

The teeth on this dado blade set are ground to a negative 5-degree angle, which Freud claims prevents chip-out during the cut, giving a cleaner dado. A bonus is that the teeth on this stack are resharpenable. Despite the budget price, owners appear to like this set, with a majority being happy with the dado finish quality.

PROS

  • Budget price for an 8-inch dado blade set
  • Good storage case
  • Resharpenable teeth

CONS

  • Two-winged chippers with one tooth per wing

General Information About Dado Blade Sets

You can buy two differing dado blade designs. We’ve looked at stacked dado blade sets today, where you ‘stack’ chipper blades together, with a saw blade as the outer blades on each side of the chippers.

Wobble Dado Blades

You can also buy wobble dado blades. These are a cheap alternative to stacked dado blades. While the name sounds dreadful, they don’t wobble. They use one blade which spins on a special hub that offsets the angle of rotation of the saw blade to the arbor. 

This hub is adjustable to give wider or narrower cuts. Woodworkers either love or hate these. They love the fact they’re cheaper to buy, but they can create vibration due to the imbalance in the plane of rotation. Maybe that’s where the ‘wobble’ name comes from. My concern is that any vibration of a mass turning at a high speed will impact the bearings used in the motor. If you use a wobble dado blade constantly on a table saw, you could potentially shorten the motor-bearing life.

The disadvantage to wobble dado blades, apart from the vibration, is that they can take some adjusting to get the right width dado, trying test cuts until you nail the exact width. Whereas with a stacked dado set, you can measure with calipers. 

A criticism of wobble dado blades is that they make a slightly concave bottom to the groove due to the cut method. While true for wider cuts, the concavity is barely noticeable on thinner cuts.

Uses For Dado Blades

We’ve discussed that dados are used to groove wood, but why would you wish to? 

The classic use all older people would have seen is for making drawer runners. Back in the day, before all the ball-bearing drawer runners came on the market, a drawer in a cabinet had a piece of square stock screwed down each side of the drawer, and the cabinet had a groove dadoed into it which the square stock slid to allow the drawer to slide.

You can also create a rabbet; a recess cut into the edge of a piece of wood. Such a recess might be to set a piece of glass into if you’re glazing a picture, or to create a right-angle joint. The corners of a box are an example of where you may use a rabbet joint.

Other jointing techniques include finger jointing, half-lap, mortise and tenon, and tongue and groove joints.

Further Reading: All You Need To Know About Table Saw Blades

Summary

Of all products reviewed, the Oshlun SDS-0842 8-Inch Dado Blade Set appears to be the best dado blade set for beginners and intermediate woodworkers. It has an unbeatable price, and while with all low-cost products you wonder where the catch is, we can’t find one with the SDS-0842, and there don’t appear to be any corners cut in the manufacturing.

The engineering, design, and build quality are excellent. Offering 42-tooth outer blades and full-bodied chippers, owners seem happy with the cleanliness of the dado. The Oshlun SDS-0842 8-inch Stack Dado is the set I’d buy, and you can grab yours here while they’re still at such a good price.

About the author

David Yeoman

David Yeoman

I'm a technical writer who writes in-depth articles for readers wanting uncomplicated explanations for creative topics made difficult by industry jargon. I'm a woodworker, metalworker, landscape photographer, writer, Python and PostgreSQL programmer, and pilot. Freelance after 42 years in the corporate world, I have an MBA in Technology.

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