Master Chainsaw Sharpening: How To Use Stihl Chainsaw Sharpener

What is the best way to sharpen a chainsaw chain? The best way to sharpen a chainsaw chain is to use the right tools and follow a consistent, accurate technique. For Stihl chainsaws, using a Stihl chainsaw sharpener, often referred to as a Stihl file guide, is highly recommended to achieve optimal cutting performance and longevity for your chain.

Maintaining a sharp chainsaw chain is crucial for efficient and safe operation. A dull chain not only makes your work harder but also puts unnecessary strain on your chainsaw, leading to premature wear and potential damage. Fortunately, with the right tools and a bit of practice, you can master the art of chainsaw sharpening and keep your Stihl equipment cutting like new. This guide will walk you through how to use a Stihl chainsaw sharpener, ensuring your chain’s teeth are always in peak condition.

How To Use Stihl Chainsaw Sharpener
Image Source: i.ytimg.com

Why Sharpening Your Chainsaw Chain Matters

Before diving into the “how,” let’s briefly touch on the “why.” A sharp chain has several advantages:

Efficiency: Sharp teeth cut wood cleanly and quickly. Dull teeth tear wood, requiring more force and time.
Safety: A sharp chain bites into the wood more readily, reducing the chance of kickback. A dull chain can bounce unpredictably.
Reduced Strain: Less effort is needed from both you and the chainsaw when the chain is sharp. This means less vibration, less wear on the engine, and less fatigue for the operator.
Longer Chain Life: Proper sharpening, including maintaining the correct chainsaw sharpening angle, helps preserve the life of your chain by removing only the necessary amount of metal from the teeth.

Introducing the Stihl Chainsaw Sharpener

Stihl offers a range of sharpening solutions, but their most common and effective manual tool is often referred to as a Stihl file guide. This is an essential piece of equipment for anyone who wants to perform manual chainsaw sharpening effectively. Essentially, it’s a jig that holds your file at the precise angle needed to sharpen each cutter on your chain.

Some users might also refer to the Stihl 2-in-1 sharpener. This is a highly convenient tool that integrates both the file and the file guide into a single unit. It simplifies the process by ensuring the correct angle and depth simultaneously. Regardless of the specific Stihl tool you have, the principles of correct chainsaw filing remain the same.

Components of a Stihl File Guide (or 2-in-1 Sharpener)

While specific designs may vary slightly, a typical Stihl file guide will include:

The Guide Body: This part securely clamps onto the chainsaw bar, positioning the file correctly over the cutter.
The File Holder: This part precisely holds the round file at the designated chainsaw sharpening angle.
The File: A high-quality round file, specifically sized for your chainsaw chain pitch.
Depth Gauge File (on some models or as a separate tool): This is a flat file used to lower the depth gauges.

What You’ll Need for Chainsaw Sharpening

Before you begin, gather these essential items:

Stihl Chainsaw Sharpener (File Guide or 2-in-1): The core of your sharpening setup.
Correctly Sized Round File: Stihl provides files for various chain pitches. Check your chainsaw manual or the chain itself for the correct size. Common sizes are 5/32″, 3/16″, and 7/32″.
Flat File (for Depth Gauges): Usually a 6-inch flat file.
Stihl File Depth Gauge Tool (or a separate depth gauge tool): This is crucial for setting the correct height of the depth gauges.
Workbench or Sturdy Surface: To stabilize the chainsaw.
Gloves: For a secure grip and to protect your hands.
Safety Glasses: Essential eye protection.
Cleaning Rag: To wipe away sawdust and oil.

Preparing Your Chainsaw for Sharpening

Proper preparation ensures safety and accuracy.

Secure the Chainsaw: Place your chainsaw on a stable workbench or flat surface. Ensure the engine is off and the chain brake is engaged.
Engage the Chain Brake: This prevents the chain from moving accidentally during sharpening.
Clean the Chain: Use a rag to wipe away any dirt, sawdust, or oil from the chain. This helps you see the cutters clearly and ensures the file makes clean contact.
Identify the Start Point: Chainsaw chains have cutters that alternate sides. You’ll typically start sharpening on one side and then move to the other. Find the shortest cutter to begin, as this will be your reference point.

Mastering Chainsaw Sharpening: Step-by-Step with a Stihl File Guide

This section details the process for manual chainsaw sharpening using a Stihl file guide. The Stihl 2-in-1 sharpener simplifies this by combining steps.

Step 1: Setting Up the Stihl File Guide

Place the file guide onto the chainsaw bar, ensuring it aligns correctly with the chain. The guide should sit firmly over the cutter you intend to sharpen.
Ensure the file holder is positioned to engage the cutter at the correct chainsaw sharpening angle. Stihl file guides are pre-set for the optimal angle, which is typically 25 or 30 degrees, depending on your chain type. Many guides have markings to indicate the correct angle.

Step 2: Sharpening the Cutters

This is the core of maintaining chainsaw teeth.

Select the Correct File: Ensure you are using the round file recommended for your chain pitch. A file that is too large or too small will not sharpen effectively and can damage the teeth.
Position the File: Place the file into the holder of the file guide, ensuring it is centered on the cutter.
Apply Downward Pressure: With firm, steady pressure, push the file forward across the cutter. Apply pressure on the forward stroke only; lift the file on the return stroke to avoid dulling the cutter or wearing down the file prematurely.
Count Your Strokes: The key to consistent chainsaw sharpening is to use the same number of strokes on each cutter. Stihl recommends a specific number of strokes, often between 5 and 10, depending on the dullness of the chain. Start with a lower number, say 5, and check the sharpness. You can always add more strokes if needed.
Maintain the Angle: The file guide is designed to maintain the best chainsaw sharpener angle. Ensure the file is properly seated in the guide and making contact with the cutter at the intended angle throughout the stroke.
Sharpen Each Cutter: Work your way around the chain, sharpening each cutter on one side using the same number of strokes.

Step 3: Sharpening the Other Side

Once you’ve sharpened all the cutters on one side, you’ll need to do the same for the cutters on the other side.

Reposition the File Guide: Rotate the file guide or adjust its position to align with the cutters on the opposite side of the chain.
Repeat the Filing Process: Using the same file and the same number of strokes, sharpen each cutter on this side. Consistency is paramount here to ensure the chain cuts evenly.

Step 4: Adjusting the Depth Gauges

The depth gauges, also known as rakers, control how much wood the cutter can bite. If they are too high, the chain will cut slowly; if they are too low, the chain will cut too aggressively and can cause excessive vibration or even dangerous kickback. This is where the Stihl file depth gauge tool comes into play.

Locate the Depth Gauge: The depth gauge is the small metal projection in front of each cutter.
Use the Depth Gauge Tool: Place the Stihl file depth gauge tool (or a similar gauge) over the chain. It has a slot that guides the file precisely over the depth gauge.
File the Depth Gauge: Use the flat file to carefully file down the depth gauge. The gauge tool will ensure you only remove the excess material, leaving the depth gauge at the correct height relative to the cutter. File it until it is flush with the guide tool’s setting.
Repeat for All Depth Gauges: Work your way around the chain, filing each depth gauge. It’s important to do this after sharpening the cutters, as sharpening can slightly alter the depth gauge height.

Step 5: Final Checks

Inspect the Teeth: Look at the sharpened cutters. They should have a sharp, pointed edge with a silvery appearance. Avoid over-filing, which can create a rounded edge.
Rotate and Feel: Gently run your gloved finger (carefully!) from the back to the front of each cutter. You should feel a sharp edge.
Check for Consistency: Ensure all cutters appear similar in length and sharpness. The depth gauges should also be uniform.

Using the Stihl 2-in-1 Sharpener: A Simplified Approach

The Stihl 2-in-1 sharpener streamlines the sharpening process. It’s designed to hold both the round file and the flat file (or a guide for the depth gauge) in a single, integrated unit.

Secure the Sharpener: Clamp the 2-in-1 sharpener onto the chainsaw bar, just as you would with a standard file guide.
Sharpen Cutters: Insert the round file into its designated holder and sharpen the cutters on one side, using the recommended number of strokes and maintaining the correct chainsaw sharpening angle.
Sharpen Other Side: Reposition the 2-in-1 sharpener to align with the cutters on the opposite side and repeat the filing process.
Adjust Depth Gauges: The 2-in-1 sharpener often has a built-in guide or a separate attachment for the depth gauges. Use the flat file to adjust them as described in Step 4 above.

The convenience of the Stihl 2-in-1 sharpener makes it a popular choice for many users, especially for those who need to perform manual chainsaw sharpening in the field.

What is the Correct Chainsaw Sharpening Angle?

The correct chainsaw sharpening angle is critical for optimal cutting performance. For most Stihl chains and general-purpose cutting, the recommended angle is 25 to 30 degrees. This angle provides a good balance between sharpness and durability.

25-degree angle: Offers a sharper cut and is often preferred for softwoods or when speed is paramount.
30-degree angle: Provides a more durable edge, suitable for hardwoods or general use where chain longevity is a priority.

Your Stihl file guide or Stihl sharpening kit will be pre-set to one of these common angles, often indicated by markings on the tool. Always consult your chainsaw’s manual or the chain manufacturer’s specifications to confirm the exact recommended angle for your specific chain. Deviating significantly from the recommended angle can lead to poor cutting, excessive wear, or damage to the chain.

Maintaining Chainsaw Teeth: Tips for Success

Sharpen Regularly: Don’t wait until your chain is completely dull. Sharpen your chain after about every 5-10 hours of use, or more frequently if you notice a decrease in cutting performance. It’s much easier to maintain a sharp edge than to restore a very dull one.
Use the Right File: Always use the file size recommended for your chain pitch. A Stihl file guide paired with the correct file is your best bet.
Consistency is Key: Apply the same number of strokes to each cutter and maintain the same chainsaw sharpening angle for every tooth.
Don’t Over-Sharpen: Removing too much metal from the teeth will shorten the life of your chain. If a cutter is severely damaged, it might be better to replace the entire chain.
Check Depth Gauges Frequently: Ensure your depth gauges are set correctly. Overly aggressive depth gauges can lead to dangerous kickback. A Stihl file depth gauge tool is invaluable here.
Storage: When not in use, store your chainsaw and sharpening tools in a dry place to prevent rust.

Troubleshooting Common Sharpening Issues

Problem	Cause	Solution
Chain not cutting smoothly	Dull cutters, incorrect chainsaw sharpening angle, high depth gauges	Re-sharpen all teeth with the correct angle and number of strokes. Check and adjust depth gauges.
Chain cuts slowly	Dull cutters, depth gauges too high	Sharpen the chain thoroughly. Adjust depth gauges using the Stihl file depth gauge tool.
Chain bounces or kicks back	Depth gauges too low, damaged cutters	Lower depth gauges to the correct height. Replace damaged chain or individual cutters if possible.
Uneven cutting	Inconsistent filing strokes or angles on cutters	Be meticulous with strokes and angles. Use a Stihl file guide for consistency.
Rapid dulling of chain	Over-sharpening, incorrect file size, cutting dirt or rocks	Use fewer strokes. Ensure correct file size. Avoid cutting into the ground or debris.
File wears out too quickly	Filing on the backstroke, using too much pressure, wrong file type	Lift file on backstroke. Use firm but controlled pressure. Ensure you’re using the correct Stihl file.

When to Consider a New Chain

Even with diligent manual chainsaw sharpening, chains have a finite lifespan. You should consider replacing your chain when:

The cutters are significantly worn down and can no longer be sharpened effectively without removing too much material.
You have sharpened the chain so many times that the depth gauges are almost level with the cutter’s gullet.
The chain has been damaged by hitting metal, rocks, or concrete.
You notice excessive cracking or stretching of the chain.

Using a good Stihl sharpening kit and maintaining your chain properly will extend its life considerably, but replacement is sometimes inevitable.

Frequently Asked Questions (FAQ)

Q: How often should I sharpen my chainsaw chain?
A: It’s best to sharpen your chain regularly, typically every 5-10 hours of use, or whenever you notice a decline in cutting performance. Sharpening small amounts frequently is better than letting it get very dull.
Q: What is the best chainsaw sharpener angle for Stihl chains?
A: For most Stihl chains, the recommended chainsaw sharpening angle is between 25 and 30 degrees. Always check your specific chain’s specifications.
Q: Can I use a generic file instead of a Stihl file?
A: While generic files might work, it’s highly recommended to use a Stihl file designed for your specific chain pitch. Stihl files are engineered to match the metallurgy and design of their chains, ensuring optimal results and longevity. Using the wrong file can damage the chain or the file itself.
Q: My chain is cutting crooked. What could be the problem?
A: Crooked cutting usually indicates an unevenly sharpened chain. Ensure that each cutter has the same number of strokes and the same chainsaw sharpening angle. Also, check that the depth gauges are all at the correct height.
Q: How do I know if my depth gauges are set correctly?
A: Use a Stihl file depth gauge tool or a similar depth gauge gauge. Place the tool over the chain; it will indicate if the depth gauge needs to be filed down to be flush with the guide. If the depth gauge is too high, the chain will cut slowly; if it’s too low, it can lead to dangerous kickback.
Q: What is the Stihl 2-in-1 sharpener?
A: The Stihl 2-in-1 sharpener is a specialized tool that combines a file guide and a depth gauge tool into a single unit. It simplifies the process of manual chainsaw sharpening by ensuring the correct angles for both the cutters and depth gauges simultaneously.
Q: When should I replace my chainsaw chain instead of sharpening it?
A: Replace your chain if the cutters are worn down so much that they can’t be sharpened properly without removing excessive metal, if they are damaged from hitting hard objects, or if the chain is excessively stretched or damaged.

Mastering chainsaw sharpening is a vital skill for any chainsaw owner. By utilizing your Stihl chainsaw sharpener correctly, paying attention to the chainsaw sharpening angle, and consistently maintaining your chain’s teeth, you ensure your Stihl chainsaw performs at its best, making your work safer and more efficient. Invest the time to learn and practice this skill, and you’ll be rewarded with a tool that cuts powerfully and reliably.