FORESTER Chainsaw Brush Cutter Blade - 9in x 20 Teeth | Fits Most Straight Shaft Trimmers | Conversion Kit Sold Separately

What It Is

The FORESTER Chainsaw Brush Cutter Blade is a 9-inch, 20-tooth circular blade designed to convert a straight-shaft string trimmer into a brush cutter for heavy vegetation like saplings, thick weeds, and brambles. It’s intended for clearing dense growth, not for grass or light trimming.

Fitment & Compatibility

• Shaft type: Only fits straight shaft trimmers; curved shaft models lack the torque and mounting length.
• Mounting hole: Standard 1-inch (25.4mm) arbor hole, but check your trimmer’s output shaft diameter—some require a bushing (not included).
• Conversion kit: A separate conversion kit (metal shield, nut, washer, and adapter) is required for safe operation. The blade alone won’t mount to most trimmers without it.
• Trimmer brands: Works with most major brands (Stihl, Echo, Husqvarna, Ryobi, etc.) that accept standard brush cutter attachments, but verify your model’s compatibility with the conversion kit.
• Power requirement: Minimum 30cc engine or equivalent electric/battery power—underpowered trimmers will stall or damage the gearbox.

Key Things to Know

• Installation difficulty: Moderate. You’ll need to remove the string head, install the conversion kit’s metal shield, then mount the blade with the provided nut (torque to spec, typically 25-35 ft-lbs). Not a 5-minute swap.
• Safety gear required: Always use the metal shield, eye protection, gloves, and heavy pants. The blade can kick back violently on thick wood.
• Sharpening: The teeth are carbide-tipped and durable but will dull over time. Sharpen with a flat file or replace; avoid grinding on a bench wheel (overheating ruins the temper).
• Common gotcha: This blade is aggressive—never use it for grass or thin weeds; it will tear up the turf and throw debris. Reserve for woody growth only.

Should You Buy It

Buy this if you have a straight-shaft trimmer with at least 30cc power and a separate conversion kit, and you regularly need to clear saplings, thorny brush, or thick weeds. Skip it if you only trim grass or have a curved shaft trimmer—you’ll waste money and risk damage.