Oregon 3-Tooth Mulching Blade 300 × 4.0 mm
A heavy 300 mm, 4 mm-thick Oregon 3-tooth shredder blade (42–48 HRC, ISO 7113) — our pick for brambles, scrub and dense vegetation on powerful brush cutters.
In short:Oregon's 3-tooth mulching blade is 300 mm across and 4.0 mm thick, with tapered edges, hardened steel at 42–48 HRC, and approval to ISO 7113 and the Machinery Directive 2006/42/EC; a 20 mm adaptor is included. The thick body resists bending on brambles and scrub and chops debris finely. It needs a powerful brush cutter rated for a 300 mm blade; for most mid-size machines, the 255 mm Oregon 3-tooth is the right size.
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Pros
- Very sturdy 4 mm steel shrugs off brambles and scrub
- Tapered teeth chop debris finely
- Meets ISO 7113 for brush cutter tools
Cons
- Only for machines rated for 300 mm blades
- Heavier than a 255 mm blade — more load on gearbox and arms
Oregon’s 3-tooth mulching blade is the heavy-duty option: 300 mm across, 4.0 mm thick, with tapered edges, in hardened steel rated 42–48 HRC. It meets ISO 7113 — the standard for brush cutter cutting tools — and the Machinery Directive 2006/42/EC, and comes with a 20 mm aluminium adaptor. It was sold by Amazon when we checked in October 2026.
Why we pick it for brambles
Bramble patches are full of tough, springy canes and hidden stumps that bend thin blades. At 4 mm thick, this one stays true, and the shredder teeth chop the canes into short pieces instead of leaving long, thorny lengths to rake up. How mulching blades work is explained on our mulching blade page.
Size matters
300 mm blades need a powerful brush cutter whose manual lists that diameter and the matching guard — typically larger petrol machines with a bike handle and full harness. Most mid-size machines are rated for 255 mm: for those, choose the Oregon 3-tooth 255.
Using it safely
Fit with the correct thrust washer and nut (usually left-hand thread — how to fit a blade), wear a visor, boots and gloves, and cut on the left side of the blade to avoid kickback (kickback explained). Technique for brambles is in how to cut brambles with a brush cutter; all blade types in the best brush cutter blades.
More blades we cover
A budget 254 mm 3-tooth blade in 1.5 mm high-carbon steel with a 25.4 mm bore — reversible and re-sharpenable, for occasional long grass and scrub.
- Type3-tooth brush blade
- Size254 mm (10 in), 25.4 mm bore
- SteelHigh-carbon steel, 1.5 mm
A two-blade set: a 230 mm 36-tooth carbide-tipped blade for brush, brambles and young wood, plus a 255 mm 3-tooth steel blade for tall grass.
- Blades230 mm 36-tooth carbide + 255 mm 3-tooth steel
- Carbide bladeManganese steel body, tungsten-carbide tips
- Arbor adapters25.4 mm and 20 mm included
Einhell's original 3-tooth thicket blade: 255 mm, 2.5 mm thick, 25.4 mm bore — for tall, woody grass, rank growth and light scrub on Einhell brush cutters.
- Type3-tooth thicket blade
- Diameter255 mm
- Thickness2.5 mm
Oregon's 255 mm, 1.4 mm-thick 2-tooth grass blade in hardened steel (42–48 HRC), with a 20 mm adaptor — for soft grass, small weeds and light growth.
- Type2-tooth grass blade
- Size255 mm × 1.4 mm
- Steel hardness42–48 HRC