FORESTER 9" Chainsaw Tooth Brush Cutter Blade - 20 Teeth, 1" Arbor with 13/64" File for Straight-Shaft Trimmers

FORESTER's 9-inch chainsaw-tooth brush cutter blade with 20 teeth and included sharpening file converts a compatible straight-shaft trimmer into a heavy-duty brush cutting tool.

This blade and file set is designed for landscaping pros and serious homeowners who need faster, more aggressive cutting than a standard string trimmer can deliver. Built with chainsaw-style teeth and a 1" arbor (20mm bushing included), the FORESTER kit mounts to most straight-shaft gas trimmers configured as brush cutters and works best on higher-horsepower engines. A separate conversion adapter is required if your trimmer uses a different head configuration.

How does this blade handle thick brush and small trees?

The chainsaw-style teeth bite through woody stems and dense vegetation that nylon line struggles with. Spinning up to high RPMs, the 20-tooth 9" blade provides rapid, aggressive cuts suitable for saplings, heavy weeds, and brush up to approximately 2.5" in diameter.

• 20 chainsaw teeth for consistent woody cutting performance
• 9" diameter covers more ground per pass than smaller blades
• Recommended for trimmers 35cc and up for safe, efficient operation
• Effective on saplings, thick weeds, and dense brush

Will this fit my trimmer and what installation parts are needed?

The blade uses a 1" arbor hole and ships with a 20mm bushing to accommodate a range of straight-shaft trimmers. It is not compatible with curved-shaft trimmers or most electric string trimmers without a proper conversion kit or adapter.

• Includes 1" arbor with 20mm bushing for common straight shafts
• Conversion kit/adapters sold separately when required
• Not suitable for curved-shaft or many electric trimmer heads
• Confirm compatibility with your trimmer manufacturer before installing

How do I maintain cutting performance and sharpen the blade?

FORESTER includes a 13/64" file sized for the blade's 3/8" pitch chain, letting you keep teeth sharp in the field. Regular sharpening preserves cutting speed, reduces engine load, and extends blade life.

• Comes with a 13/64" file for the 3/8" pitch chain
• Sharpen individual teeth to factory-like angles for best results
• Inspect for damaged links or excessive wear before each use
• Wear protective gloves and follow safety steps when filing

What safety and equipment considerations should I know?

Because this is a high-speed, aggressive cutter, proper guards, personal protective equipment, and a compatible high-horsepower trimmer are essential. Use the blade only with trimmers set up as brush cutters and with a guard sized for a 9" rotating blade.

• Use with recommended protective guard and lower-shaft mount
• Wear eye, ear, leg, and hand protection during operation
• Do not use on curved-shaft or incompatible electric trimmers
• Keep bystanders clear of the work area while cutting

Who this is for: Landscapers, property managers, and experienced homeowners who need a faster, more durable cutting solution than line trimmers will allow. The FORESTER 9" chainsaw-tooth brush cutter blade is aimed at users with straight-shaft, higher-horsepower trimmers who are comfortable performing blade installations and routine sharpening. If your work involves dense brush, saplings, or heavy overgrowth and your trimmer supports a 1" arbor (or you can obtain the correct adapter), this blade provides a professional-grade cutting option.