How To Sharpen Chain Saw Blade Like A Pro: Step-by-Step

Are you wondering how to sharpen a chainsaw chain? The answer is with the right tools, proper technique, and a little patience. This guide provides a detailed, step-by-step explanation of chainsaw sharpening, covering everything from choosing the best chainsaw sharpening tools to mastering the correct angle for sharpening chainsaw teeth. Learning to sharpen chainsaw yourself will save you money and keep your saw cutting efficiently.

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Why Sharpen Your Chainsaw Blade?

A dull chainsaw is a dangerous chainsaw. It requires more force to cut, increasing the risk of kickback and operator fatigue. A sharp chain cuts faster, cleaner, and more safely. Regular chainsaw blade sharpening also extends the life of your chain and bar.

The Benefits of a Sharp Chain

• Increased Safety: Reduces the risk of kickback and injury.
• Improved Cutting Efficiency: Cuts faster and with less effort.
• Reduced Fatigue: Less strain on the operator.
• Extended Equipment Life: Prevents unnecessary wear and tear on the saw.
• Cost Savings: Avoids expensive repairs and replacements.

Essential Chainsaw Sharpening Tools

Before you begin, gather the necessary chainsaw sharpening tools. Having the right equipment will make the job easier and more accurate.

Must-Have Tools

• Round File: The most common tool for sharpening chain saw teeth. Choose the correct diameter for your chain size (see chart below).
• File Guide: Helps maintain the correct angle and depth for consistent sharpening.
• Flat File: Used for filing the depth gauges (rakers).
• Depth Gauge Tool: Measures the height of the depth gauges.
• Vise or Clamp: Secures the chainsaw bar for stability.
• Gloves: Protects your hands.
• Eye Protection: Shields your eyes from metal filings.
• Cleaning Brush: Removes debris from the chain.

Optional, But Helpful Tools

• Chainsaw Sharpener (Electric or Manual): Can speed up the sharpening process and provide consistent results.
• Stump Vise: Holds the chainsaw in place in the field.
• Magnifying Glass: Helps to see small details.

Round File Size Chart

Chain Pitch	File Size
1/4″	5/32″ (4.0 mm)
.325″	3/16″ (4.8 mm)
3/8″ Low Profile	5/32″ (4.0 mm)
3/8″	7/32″ (5.5 mm)
.404″	13/64″ (5.2 mm) or 7/32″ (5.5 mm)

Preparing Your Chainsaw for Sharpening

Proper preparation is crucial for effective and safe chainsaw sharpening.

Cleaning the Chain and Bar

1. Remove Debris: Use a brush to remove dirt, sawdust, and oil from the chain and bar.
2. Inspect the Chain: Look for damaged or broken teeth. If the chain is severely damaged, it may need to be replaced.
3. Clean the Bar Groove: Use a screwdriver or specialized tool to clean out the groove in the bar. This ensures proper lubrication and chain movement.

Securing the Chainsaw

1. Vise Method: Secure the chainsaw bar in a vise, ensuring the chain is accessible.
2. Stump Vise Method: If working in the field, use a stump vise to hold the chainsaw in place.
3. Stable Surface: If a vise isn’t available, place the chainsaw on a stable, flat surface.

Step-by-Step Guide to Sharpening Chainsaw with a File

Filing chainsaw blade is a straightforward process when done correctly. Follow these steps for optimal results:

Step 1: Finding the Correct Sharpening Angle

The angle for sharpening chainsaw teeth is critical. Most chains have markings on the tooth to indicate the correct angle. Refer to your chainsaw’s manual for the manufacturer’s recommended angle. Typically, the top plate angle is between 25 and 35 degrees. The side plate angle is usually around 85-90 degrees.

Step 2: Sharpening the Cutter Teeth

1. Position the File: Place the round file in the tooth, using the file guide to maintain the correct angle. Ensure that approximately 1/5 of the file diameter is above the top of the cutter.
2. File Stroke: Using smooth, even strokes, file the tooth from the inside out. Apply pressure on the forward stroke and release on the return stroke.
3. Consistent Strokes: Maintain a consistent number of strokes for each tooth (usually 3-5 strokes) to ensure uniform sharpening.
4. Sharpen Every Tooth: Sharpen each tooth on one side of the chain, then rotate the chainsaw to sharpen the teeth on the other side.
5. Mirror Image: Ensure that the teeth on one side are mirror images of the teeth on the other side.

Step 3: Lowering the Depth Gauges (Rakers)

The depth gauges, also known as rakers, control how deeply the chain cuts. As you sharpen the teeth, the depth gauges become relatively higher and need to be filed down.

1. Check Depth Gauge Height: Use a depth gauge tool to measure the height of the depth gauges.
2. File Depth Gauges: Place the flat file on top of the depth gauge tool and file down any portion of the depth gauge that protrudes above the tool.
3. Round the Front: Use the flat file to slightly round the front of the depth gauge. This prevents the chain from grabbing and causing kickback.
4. Consistent Depth: Ensure that all depth gauges are filed to the same height.

Step 4: Testing the Chain

After sharpening, test the chain to ensure it cuts properly.

1. Visual Inspection: Check that all teeth are uniformly sharpened and that the depth gauges are at the correct height.
2. Cutting Test: Make a test cut in a piece of wood. A sharp chain should produce long, smooth shavings. A dull chain will produce sawdust or require excessive force.

Chainsaw Sharpening Techniques: Beyond the Basics

While the steps above provide a solid foundation, mastering chainsaw sharpening requires more than just following instructions. Here are some advanced techniques to consider:

Identifying Dull Teeth

Before you begin sharpening, identify the dull teeth on the chain. Dull teeth will have rounded edges and may appear shiny or polished. Use a marker to mark the first tooth you sharpen. This helps you keep track and ensures you sharpen every tooth.

Using a Chainsaw Sharpener

Electric or manual chainsaw sharpener tools can provide more consistent results, especially for those new to sharpening chainsaw. These tools typically feature adjustable angles and depth settings, making it easier to achieve a precise and uniform sharpening. Follow the manufacturer’s instructions for your specific sharpener model.

Maintaining Proper Chain Tension

Proper chain tension is essential for safe and efficient cutting. A chain that is too loose can derail or cause kickback, while a chain that is too tight can cause excessive wear and tear. Adjust the chain tension according to the manufacturer’s recommendations.

Recognizing When to Replace a Chain

Even with regular chainsaw blade sharpening, chains eventually wear out and need to be replaced. Signs that your chain needs replacing include:

• Excessive wear on the teeth.
• Broken or damaged teeth.
• Difficulty maintaining a sharp edge.
• Stretching of the chain beyond the adjustment range.

Grasping Different Types of Chainsaw Chains

There are several types of chainsaw chains, each designed for specific cutting applications. It’s important to choose the right chain for your needs and to sharpen chainsaw accordingly.

Full Chisel Chains

• Characteristics: Aggressive cutting, square-cornered teeth.
• Best For: Clean wood, professional use.
• Sharpening: Requires precise angle control.

Semi-Chisel Chains

• Characteristics: More forgiving than full chisel, rounded corners.
• Best For: General use, dirty or knotty wood.
• Sharpening: Easier to sharpen than full chisel.

Low-Profile Chains

• Characteristics: Reduced kickback, rounded teeth.
• Best For: Homeowners, safety-conscious users.
• Sharpening: Requires a smaller file and shallower angle.

Chipper Chains

• Characteristics: Rounded cutting edges, durable.
• Best For: Heavy-duty cutting, dirty wood.
• Sharpening: Similar to semi-chisel chains.

Tips for Prolonging Chain Sharpness

To minimize the frequency of chainsaw blade sharpening, consider these tips:

• Avoid Cutting Dirty Wood: Dirt and grit quickly dull the chain. Clean the wood before cutting if possible.
• Keep the Chain Lubricated: Proper lubrication reduces friction and heat, extending the life of the chain.
• Store the Chainsaw Properly: Store the chainsaw in a clean, dry place to prevent rust and corrosion.
• Use the Right Chain for the Job: Using the appropriate chain for the type of wood you’re cutting will prevent unnecessary wear.
• Inspect the Chain Regularly: Check for damage or wear before each use and address any issues promptly.

Frequently Asked Questions (FAQ)

Q: What is the best way to sharpen a chainsaw chain?
A: The best way to sharpen a chainsaw chain is by using a round file and file guide, or an electric chainsaw sharpener, ensuring the correct angle and consistent strokes.

Q: Can I sharpen a chainsaw chain while it’s on the saw?
A: Yes, you can sharpen a chainsaw chain while it’s on the saw, but it’s safer and easier to remove the chain or secure the bar in a vise for better stability.

Q: Who is qualified to sharpen a chainsaw chain?
A: Anyone can learn to sharpen a chainsaw chain with the right tools and instructions. However, professional sharpening services are available for those who prefer expert assistance.

Q: How often should I sharpen my chainsaw chain?
A: Sharpen your chainsaw chain whenever you notice a decrease in cutting performance, typically after every few hours of use.

Q: What angle should I use when sharpening my chainsaw chain?
A: The angle for sharpening chainsaw teeth typically ranges from 25 to 35 degrees for the top plate and around 85 to 90 degrees for the side plate. Refer to your chainsaw’s manual for specific recommendations.

Q: Can a dull chainsaw be dangerous?
A: Yes, a dull chainsaw is dangerous because it requires more force to cut, increasing the risk of kickback and operator fatigue.

Q: What do I do if I mess up sharpening my chainsaw chain?
A: If you make a mistake while sharpening, you can either try to correct it by carefully re-sharpening the affected teeth, or consult a professional for assistance. In severe cases, you may need to replace the chain.

By following this comprehensive guide, you can master the art of sharpening chainsaw like a pro, ensuring safe, efficient, and enjoyable cutting for years to come.