Best Brush Cutter Blades for Weedeater Trimmers
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A brush cutter blade for weedeater is a metal blade that fits the drive shaft of a straight-shaft trimmer in place of the string head, so the machine can cut brush and thick weeds. This roundup covers six blade sets from our product pack, with diameters of 7 and 9 inches (one set gives only a length) and tooth counts from 16 to 36. Each entry uses only what its listing states about size, teeth, material and adapter kit. Where a listing gives size fields that do not match its title, this guide says so.
Quick answer
- For brush and thicker stems, the 9-inch 20-tooth and 9-inch 36-tooth carbide sets are the common picks in the listings.
- For a lighter job, the 7-inch 16-tooth set in the pack is the smallest diameter, and it suits lighter growth.
- Most listings give a 1-inch (25.4 mm) center hole for straight-shaft trimmers. Confirm the arbor on your trimmer before ordering.
- Several listings say the blades fit gas straight-shaft trimmers. Check your trimmer’s type on the product page.
How to choose a brush cutter blade for a weedeater
Tooth count and diameter are the two main choices. A blade with 16 or 20 teeth cuts with a chainsaw-type tooth, and the listings describe those for brush and tough weeds. A blade with 36 carbide-tipped teeth gives a finer cut on thinner stems. Diameter sets how much ground each pass covers. The listings in this roundup give 7-inch, 9-inch and 10-inch options, and the 9-inch size is the most common.
Steel type comes next. The listings describe carbon steel, SK5 steel, manganese steel and carbide-tipped blades. Carbon and SK5 steels are the lower-cost options, and the listings describe them for grass and weeds. Carbide tips are described for heavier use and a longer working life. The listings do not give a comparison test, so these are the manufacturers’ descriptions.
Fit is the last choice. Most listings give a 1-inch center hole and include an adapter kit with washers and a collar nut. The adapter kit must match the trimmer brand and the gear case, so check the compatibility line before you buy.
Comparison table
The table uses only values stated in each listing. “Not stated” means the listing gives no value.
| Product | Diameter | Teeth | Steel or tip | Arbor or adapter | Count in listing |
|---|---|---|---|---|---|
| Gashwer 9 inch 36T and 9 inch 20T combo | 9 inch | 36 carbide and 20 chainsaw | Carbide and carbon steel | 1-inch arbor, universal adapter | 2 blades |
| ChoirLingo SK5 brush blade | Not stated (12.01 inch listing length) | Not stated | SK5 alloy steel | Not stated | 2 blades |
| Gashwer 9 inch 20T 2-set | 9 inch | 20 chainsaw tooth | Manganese steel | 1-inch arbor, two adapter kits | 2 blades |
| Kohnkdllc 9 inch 20T with round blade | 9 inch | 20 chainsaw tooth | Carbon steel | 1-inch arbor, two adapter kits | 2 blades |
| Kohnkdllc 7 inch 16T | 7 inch | 16 chainsaw tooth | Carbon steel | 1-inch arbor, two adapter kits | 2 blades |
| KAKO 9 inch 36T carbide tipped | 9 inch | 36 carbide tipped | Carbide tipped | 1-inch arbor, universal adapter | 2 blades |
Roundup: six blade sets from the pack
Gashwer 9 inch 36-tooth and 20-tooth combo with universal adapter
This combo includes a 9-inch carbide-tipped 36-tooth blade and a 9-inch 20-tooth chainsaw-style blade, with a universal adapter kit. The listing describes the blades as manganese steel with reinforced carbide teeth, and it gives a 1-inch center hole for most straight-shaft gas trimmers.
The combo covers two jobs in one set. The 20-tooth blade is for branches and thicker growth, and the 36-tooth carbide blade is for a finer cut. The listing says the adapter kit has two full sets of mounting hardware, so the buyer can match the set to the trimmer. The listing gives a 9-inch width in its spec fields.
ChoirLingo SK5 steel brush cutter blade for weedeater, 2-pack
This pack has two SK5 steel brush cutter blades for weed wackers and trimmers. The listing describes the steel as high durability SK5 steel, and it says each set includes two blades for trimming lawns and weeds. It describes the blades as quick to replace when they dull, and it suggests storing a spare.
The listing gives a product length of 12.01 inches and a width of 3.54 inches in the spec fields, but it does not give a diameter or a tooth count in the bullet text. Confirm the diameter, the tooth count and the arbor on the product page before buying.
Gashwer 9 inch 20-tooth carbon steel brush cutter blade kit
This Gashwer kit is a 9-inch 20-tooth blade set made from manganese steel. The listing describes a 1-inch (25.4 mm) arbor hole for most straight-shaft gas trimmers, and it says the kit includes two full sets of adapter hardware with thrust washers, rider plates, collar nuts and lock washers.
The listing says the blade works with Stihl and other brands of straight-shaft trimmers. A 20-tooth chainsaw-type blade is a good match for thicker growth and small woody stems. The listing does not give a maximum speed or weight in the text used here.
Kohnkdllc 9 inch 20-tooth carbon steel brush cutter blade, 2-pack
This Kohnkdllc listing is a two-pack of 9-inch 20-tooth carbon steel blades, with a bonus round blade in the title. The listing gives a 1-inch arbor and says the blades fit most gas trimmers, and the bullet text says straight-shaft trimmers only.
The listing says the kit includes two adapter sets. Each set has a blade adapter, a thrust washer, a rider plate and a collar nut. The listing describes the carbon steel as fine grade and heat and rust resistant. It does not give a weight.
Kohnkdllc 7 inch 16-tooth carbon steel brush cutter blade, 2-pack
This Kohnkdllc set is the smallest diameter in the roundup, at 7 inches, with 16 chainsaw-style teeth. The listing gives a 1-inch arbor and says the blades fit most gas straight-shaft trimmers. It includes two adapter sets, and the listing describes the blades as made from carbon steel.
A 7-inch blade covers less ground per pass than the 9-inch blades in this roundup. The listing does not give a maximum speed or weight.
KAKO 9 inch 36-tooth carbide tipped brush cutter blade with universal adapter
The KAKO set includes two 9-inch blades with 36 carbide-tipped teeth and a universal adapter kit. The listing says the blades are made of manganese steel with an insert that has higher hardness. It says they fit most gas or electric straight-shaft trimmers, which is a broader fit claim than some other listings in this roundup.
The 36-tooth carbide blade gives a finer cut than the 20-tooth blades. It suits thinner stems and brush. The listing does not give a weight or a maximum speed. Check the arbor on your trimmer before you buy, because the listing says the adapter is universal, not brand specific.
In-depth look: the Gashwer 9 inch combo
The Gashwer combo is the most complete listing in this roundup for a buyer who wants two tooth types in one purchase. It pairs a 9-inch 36-tooth carbide blade with a 9-inch 20-tooth chainsaw-style blade and includes a universal adapter kit with two full sets of hardware.
The steel and tip design is the main feature. The listing describes manganese steel with reinforced carbide teeth, and it says the blades are durable. The 20-tooth blade is for branches and thick growth, and the 36-tooth carbide blade is for finer cutting. The two blades cover more of the jobs a trimmer owner is likely to face.
Fit is the second point. The listing gives a 1-inch (25.4 mm) center hole for most straight-shaft gas trimmers and says the adapter kit fits a range of brands. The listing does not name a weight or a maximum speed, so check those on the product page before fitting the blades. Close alternatives in this roundup are the KAKO 36-tooth carbide blade, which lists a universal adapter, and the Gashwer 20-tooth kit, which lists a manganese steel blade.
Matching a blade to the job
For heavy brush and thicker stems, a 20-tooth chainsaw-style blade is the listings’ main choice. The Gashwer 20-tooth kit and the Kohnkdllc 9-inch 20-tooth pack both describe that use. For a finer cut on thinner growth, the 36-tooth carbide blades from Gashwer and KAKO are the closest match.
For a lighter job, the Kohnkdllc 7-inch 16-tooth set is the smallest in the roundup. It covers less ground per pass but puts less load on the trimmer. For a set that cuts well on both grass and brush, the Gashwer combo gives both tooth types.
Check the trimmer’s manual before fitting any blade. Most straight-shaft gas trimmers list a maximum blade size, and the blade should not exceed it.
Safety and fit points
A metal brush blade spins at high speed and can throw debris. Wear eye protection, gloves and sturdy footwear, and keep bystanders clear. Disconnect the spark plug wire before changing the blade, and check that the adapter and collar nut are tight before starting the trimmer.
Use the trimmer’s guard. A blade should not run without it. Inspect the blade before each use for cracks, bent teeth or loose rivets, and replace the blade if you see damage.
FAQ
Will a brush cutter blade fit any weedeater?
Not always. Most listings in this roundup are for straight-shaft gas trimmers with a 1-inch arbor. A curved-shaft trimmer needs a different accessory, and some listings say they are not for electric trimmers. Check the fit note before ordering.
What tooth count should I choose?
A 16 or 20-tooth chainsaw-style blade suits brush and thicker growth. A 36-tooth carbide blade suits a finer cut on thinner stems. The listings give a tooth count for each set.
What diameter is best for a weedeater?
The roundup offers 7-inch and 9-inch blades. The 9-inch size covers more ground per pass, and the 7-inch size puts less load on the trimmer. The listings do not give a single best size, so match the blade to the trimmer’s manual.
Are carbide blades better than steel blades?
The listings describe carbide tips as suited to heavier use and a longer working life, while carbon and manganese steel are described as the lower-cost option. The pack does not include a test that compares them, so treat the claims as the manufacturers’ descriptions.
What is in the adapter kit?
Most listings include a blade adapter, a thrust washer, a rider plate and a collar nut, and some include two full sets. The adapter must match the trimmer brand and the gear case.
Do these blades need a special arbor?
Most listings give a 1-inch (25.4 mm) center hole. Some listings also state a 20 mm arbor. Check your trimmer’s arbor before you order.
Bottom line
For a brush cutter blade for a weedeater, choose the tooth count by the job and the diameter by the trimmer. The Gashwer combo gives you a 20-tooth and a 36-tooth blade together. The Gashwer 20-tooth kit and the Kohnkdllc 9-inch pack are the simplest choices for brush. The KAKO 36-tooth carbide blade suits a finer cut, and the Kohnkdllc 7-inch set is the lightest option.
For background on trimmer heads and how they differ, read brush cutter vs string trimmer.
