Chain For MS170 Saws (5 Expert Tips For Efficient Cutting)

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Have you ever felt the frustration of your chainsaw chain dulling mid-cut, turning what should be a smooth operation into a teeth-gritting struggle? I know I have. There’s nothing quite like the feeling of wrestling a dull chain through a stubborn log, especially when you’re on a tight schedule or battling against the fading daylight. The Stihl MS170 is a fantastic saw for smaller tasks, but even the best tool is only as good as its chain. That’s why I’m so passionate about helping people get the most out of their MS170 by optimizing their chain selection and maintenance.

This article isn’t just about picking any old chain; it’s about finding the right chain and using it correctly to maximize your MS170’s potential. I’m going to share my hard-earned lessons, gleaned from years of cutting everything from small branches to decent-sized firewood logs.

Understanding Chain Types for the MS170: Demystifying the different types of chains available and which are best suited for specific tasks.
Choosing the Right Chain Length and Pitch: Ensuring you get the perfect fit for your saw and cutting needs.
Sharpening Your Chain Like a Pro: Step-by-step instructions and expert tips to keep your chain razor-sharp.
Maintaining Your Chain for Longevity: Simple yet effective practices to extend the life of your chain and saw.
Troubleshooting Common Chain Problems: Identifying and resolving issues that can hamper your cutting efficiency.

By the end of this article, you’ll have the knowledge and confidence to select, maintain, and troubleshoot your MS170 chain like a seasoned pro. Let’s dive in!

Understanding Chain Types for the MS170

Choosing the right chain for your Stihl MS170 is paramount for efficient cutting and extending the life of your saw. The MS170, being a smaller, lighter-duty saw, benefits most from chains designed for speed and ease of cutting.

The Low-Kickback Advantage: Safety First

One of the most important considerations, especially for newer users, is kickback reduction. Kickback is when the tip of the bar catches on the wood and throws the saw back towards the operator. It’s a leading cause of chainsaw injuries. Low-kickback chains are designed with features that reduce the likelihood of this happening.

Bumper Tie Straps: These small, raised sections ahead of the cutting teeth help prevent the teeth from digging in too deeply, which can initiate kickback.
Ramped Depth Gauges: These control the amount of wood the cutting tooth can take with each pass, reducing the force of the cut and the risk of kickback.

For example, Stihl’s “PMMC3” (Pico Micro Comfort 3) chain is a popular choice for the MS170. It features a low-kickback design, making it ideal for homeowners and occasional users who prioritize safety.

My Experience: When I first started using chainsaws, I didn’t fully appreciate the importance of kickback reduction. I was using an older saw with a standard chain, and I experienced a couple of close calls. It was a sobering reminder of the power of these tools and the need for respect and caution. Switching to a low-kickback chain significantly improved my confidence and safety.

Full Chisel vs. Semi-Chisel: Cutting Aggressiveness

The shape of the cutting tooth determines how aggressively the chain cuts. There are two main types:

Full Chisel: These chains have square-cornered teeth that slice through wood quickly and efficiently. They are ideal for clean wood and experienced users. However, they dull more easily when exposed to dirt or abrasive materials.
Semi-Chisel: These chains have rounded corners, making them more durable and less prone to dulling. They are a good choice for cutting dirty or frozen wood, or for users who are less experienced with chainsaw maintenance.

For the MS170, I generally recommend semi-chisel chains unless you are working exclusively with clean wood and are diligent about sharpening. The trade-off in cutting speed is often worth the increased durability and ease of maintenance.

Data Point: Studies have shown that full chisel chains can cut up to 20% faster than semi-chisel chains in clean wood. However, in dirty wood, semi-chisel chains can maintain their cutting efficiency for up to 50% longer.

Gauge and Drive Links: Ensuring Compatibility

The gauge of a chain refers to the thickness of the drive links, which fit into the groove of the guide bar. The MS170 typically uses a .050″ gauge chain. Using the wrong gauge can damage the chain, the bar, and even the saw itself.

The number of drive links determines the length of the chain. This is crucial for ensuring the chain fits properly on the bar. The MS170 most commonly uses a chain with 50 drive links when paired with a 16″ bar. Always check your saw’s manual or the bar itself to confirm the correct gauge and number of drive links.

Key Takeaway: Always double-check the gauge and drive link count before purchasing a new chain. A mismatch can lead to poor performance and potential damage.

Choosing the Right Chain Length and Pitch

Beyond chain type, getting the correct chain length and pitch is critical for optimal performance and safety. Using the wrong size can damage your saw and create a dangerous working environment.

Understanding Chain Pitch

Pitch refers to the distance between any three consecutive rivets on the chain, divided by two. It’s a crucial measurement for ensuring compatibility between the chain, the bar, and the sprocket on your chainsaw. The MS170 typically uses a 3/8″ low-profile pitch chain.

Why is pitch important?

Proper Engagement: The pitch must match the sprocket on your saw. If the pitch is incorrect, the chain won’t engage properly, leading to slippage, increased wear, and potential damage.
Smooth Cutting: The correct pitch ensures the chain runs smoothly along the bar, providing efficient cutting and reducing vibration.
Safety: Using the wrong pitch can increase the risk of chain breakage or derailment, which can be extremely dangerous.

How to determine the pitch:

Check the Bar: Most guide bars have the pitch stamped directly on them.
Consult Your Manual: Your chainsaw’s manual will specify the correct pitch for your model.
Measure: If you’re unsure, you can measure the pitch using a ruler or pitch gauge.

My Experience: I once made the mistake of using a chain with the wrong pitch on one of my saws. The chain kept jumping off the bar, and the saw vibrated excessively. It was a frustrating and potentially dangerous experience. I quickly learned the importance of verifying the pitch before installing a new chain.

Determining the Correct Chain Length

Chain length is determined by the number of drive links. As mentioned earlier, the MS170 typically uses a chain with 50 drive links when paired with a 16″ bar. However, it’s always best to double-check your saw’s manual or the bar itself to confirm the correct number.

Why is chain length important?

Proper Tension: The correct chain length allows for proper tensioning. A chain that is too long will be loose and prone to derailment, while a chain that is too short will be too tight and can damage the bar and sprocket.
Optimal Cutting: Proper chain tension ensures the chain engages the wood effectively, providing smooth and efficient cutting.
Safety: A properly tensioned chain is less likely to break or derail, reducing the risk of injury.

How to determine the correct chain length:

Check the Bar: The number of drive links is often stamped on the guide bar.
Consult Your Manual: Your chainsaw’s manual will specify the correct number of drive links for your model.
Count the Links: If you have an old chain, you can count the number of drive links.

Key Takeaway: Always verify the pitch and number of drive links before purchasing a new chain. This will ensure proper fit and optimal performance.

Bar Length Considerations

While the MS170 is commonly paired with a 16″ bar, it can also be used with a 14″ bar. If you switch bar lengths, you’ll need to adjust the chain length accordingly. A shorter bar will require a chain with fewer drive links.

General Rule: For every 2 inches of bar length, you’ll typically need to add or subtract approximately 3-4 drive links.

Example: If you switch from a 16″ bar (50 drive links) to a 14″ bar, you’ll likely need a chain with around 46-47 drive links.

Expert Insight: “Using the correct bar and chain combination is crucial for maximizing the performance and lifespan of your chainsaw,” says Bob Vila, a renowned home improvement expert. “Always consult your owner’s manual and follow the manufacturer’s recommendations.”

Sharpening Your Chain Like a Pro

A sharp chain is not only more efficient but also safer. A dull chain requires more force to cut, increasing the risk of kickback and operator fatigue. Sharpening your chain regularly is essential for maintaining peak performance and extending its lifespan.

The Importance of Regular Sharpening

Think of your chainsaw chain like a knife. A sharp knife slices effortlessly through food, while a dull knife requires more force and is more likely to slip and cause injury. The same principle applies to chainsaw chains.

Benefits of a Sharp Chain:

Faster Cutting: A sharp chain cuts through wood more quickly and efficiently, saving you time and effort.
Reduced Fatigue: A sharp chain requires less force to operate, reducing operator fatigue and the risk of injury.
Improved Safety: A sharp chain is less likely to kickback, making it safer to use.
Extended Chain Life: Regular sharpening prevents excessive wear and tear, extending the life of your chain.
Better Fuel Efficiency: A sharp chain requires less power to operate, improving fuel efficiency.

How Often to Sharpen:

The frequency of sharpening depends on several factors, including the type of wood you’re cutting, the condition of the wood (clean vs. dirty), and the amount of use. As a general rule, you should sharpen your chain:

Before Each Use: This ensures your chain is always at its peak performance.
When the Chain Starts to Dull: Signs of a dull chain include:
- The saw requires more force to cut.
- The chain produces fine sawdust instead of wood chips.
- The saw pulls to one side.
- The chain vibrates excessively.
After Hitting Dirt or Rocks: Even a brief encounter with dirt or rocks can dull your chain.

My Experience: I used to wait until my chain was noticeably dull before sharpening it. This was a mistake. I found that sharpening more frequently, even if the chain didn’t seem that dull, resulted in faster cutting, less fatigue, and a longer chain lifespan.

Tools for Sharpening

There are several methods for sharpening chainsaw chains, each with its own advantages and disadvantages.

Round File and File Guide: This is the most common and affordable method. It requires a round file of the correct size for your chain’s pitch, a file guide to maintain the correct angle and depth, and a flat file for adjusting the depth gauges.
Electric Chain Sharpener: This is a faster and more precise method, but it requires a larger investment. Electric sharpeners use a grinding wheel to sharpen the teeth.
Handheld Sharpening Tools: These are compact and portable tools that allow you to sharpen your chain on the go. They are a good option for occasional users or for touching up your chain in the field.

For the MS170, I recommend using a round file and file guide. It’s a cost-effective and versatile method that allows you to sharpen your chain accurately and effectively.

Tools You’ll Need:

Round file (typically 5/32″ for the MS170)
File guide
Flat file
Depth gauge tool
Vise or clamp

Step-by-Step Sharpening Guide

Secure the Chain: Place the chainsaw in a vise or clamp to hold it securely.
Identify the Shortest Cutter: Examine the cutters on your chain and identify the shortest one. This will be your guide for sharpening the other cutters.
Position the File Guide: Place the file guide on the chain, aligning it with the cutter you’re sharpening. The file guide will help you maintain the correct angle and depth.
Sharpen the Cutter: Using smooth, even strokes, file the cutter from the inside out, following the angle of the file guide. Apply gentle pressure on the forward stroke and release pressure on the return stroke.
Count Your Strokes: Count the number of strokes you use to sharpen the first cutter. This will help you maintain consistency when sharpening the other cutters.
Sharpen the Remaining Cutters: Repeat steps 3-5 for all the cutters on the chain, using the same number of strokes for each cutter.
Adjust the Depth Gauges: After sharpening the cutters, use a flat file and depth gauge tool to adjust the depth gauges. The depth gauges control the amount of wood the cutting tooth can take with each pass. If the depth gauges are too high, the chain will be too aggressive and prone to kickback. If the depth gauges are too low, the chain will not cut effectively.
Inspect Your Work: After sharpening, inspect your work to ensure all the cutters are sharp and the depth gauges are properly adjusted.

Expert Tip: “Always sharpen your chain in a well-lit area and wear safety glasses to protect your eyes from flying debris,” advises Sarah Johnson, a certified arborist. “Take your time and focus on maintaining the correct angle and depth. A properly sharpened chain will make a world of difference in your cutting performance.”

Maintaining Depth Gauges

The depth gauges, also known as rakers, are the small protrusions in front of each cutting tooth. They control how much wood the cutting tooth can take with each pass. If the depth gauges are too high, the chain will be too aggressive and prone to kickback. If they are too low, the chain won’t cut effectively.

Checking Depth Gauges:

Use a depth gauge tool to check the height of the depth gauges. The tool will have markings indicating the correct height for your chain’s pitch.
Place the tool over the depth gauge and cutter. If the depth gauge protrudes above the tool, it needs to be filed down.

Filing Depth Gauges:

Use a flat file to file down the depth gauges.
File the depth gauges evenly, maintaining a consistent height across the chain.
Round off the front of the depth gauges to prevent them from catching on the wood.

Key Takeaway: Maintaining the correct depth gauge height is crucial for optimal cutting performance and safety. Check and adjust the depth gauges regularly, especially after sharpening the cutters.

Maintaining Your Chain for Longevity

Proper maintenance is key to extending the life of your chainsaw chain and ensuring optimal performance. Neglecting maintenance can lead to premature wear, reduced cutting efficiency, and even chain breakage.

Chain Lubrication: The Lifeblood of Your Chain

Proper lubrication is essential for reducing friction, preventing overheating, and extending the life of your chain and bar. The oil acts as a coolant and lubricant, reducing wear and tear on the chain and bar.

Why is lubrication important?

Reduces Friction: Lubrication reduces friction between the chain and the bar, preventing overheating and wear.
Removes Debris: The oil helps flush away sawdust and debris, keeping the chain and bar clean.
Prevents Corrosion: The oil protects the chain and bar from rust and corrosion.
Extends Chain Life: Proper lubrication can significantly extend the life of your chain.
Improves Cutting Efficiency: A well-lubricated chain cuts more smoothly and efficiently.

How to Lubricate Your Chain:

Use the Correct Oil: Use a high-quality bar and chain oil specifically designed for chainsaws. Avoid using motor oil or other substitutes, as they may not provide adequate lubrication.
Fill the Oil Reservoir: Check the oil reservoir before each use and fill it as needed.
Adjust the Oil Flow: Most chainsaws have an adjustable oil flow. Adjust the flow to ensure the chain is adequately lubricated without excessive oil consumption.
Check for Proper Lubrication: After starting the saw, check to see if the chain is being properly lubricated. You should see a fine mist of oil being thrown off the chain as it runs.

My Experience: I once ran my chainsaw without enough oil, and the chain quickly overheated and seized up. The bar was damaged, and the chain was ruined. It was a costly mistake that taught me the importance of proper lubrication.

Expert Insight: “Always use a high-quality bar and chain oil and check the oil level frequently,” advises Tom Silva, a renowned contractor and television personality. “Proper lubrication is the key to extending the life of your chain and bar.”

Chain Tensioning: Finding the Sweet Spot

Proper chain tension is crucial for safe and efficient cutting. A chain that is too loose can derail and cause injury, while a chain that is too tight can damage the bar and sprocket.

How to Check Chain Tension:

Wear Gloves: Always wear gloves when handling the chain.
Pull the Chain Away from the Bar: Pull the chain away from the bar at the midpoint of the underside.
Check the Drive Links: The drive links should protrude slightly from the bar groove.
Rotate the Chain: Rotate the chain around the bar to ensure it moves smoothly and freely.

Adjusting Chain Tension:

Loosen the Bar Nuts: Loosen the bar nuts that secure the bar to the saw.
Adjust the Tensioning Screw: Use the tensioning screw to adjust the chain tension.
Tighten the Bar Nuts: Once the chain is properly tensioned, tighten the bar nuts securely.
Recheck the Tension: After tightening the bar nuts, recheck the chain tension to ensure it is still correct.

Proper Tension: The chain should be snug against the bar but still able to be pulled around by hand. When you pull the chain away from the bar at the midpoint of the underside, the drive links should protrude slightly from the bar groove.

Key Takeaway: Check and adjust the chain tension regularly, especially when the chain is new or after extended use. A properly tensioned chain is essential for safe and efficient cutting.

Bar Maintenance: Keeping it Straight and True

The guide bar is a critical component of your chainsaw. It supports the chain and guides it through the wood. Proper bar maintenance is essential for extending its life and ensuring optimal cutting performance.

Bar Maintenance Tips:

Clean the Bar Groove: Regularly clean the bar groove to remove sawdust and debris. This will ensure the chain runs smoothly and prevents premature wear.
File the Bar Rails: File the bar rails to remove any burrs or damage. This will ensure the chain fits properly and prevents it from derailing.
Check for Wear: Regularly check the bar for wear and damage. If the bar is bent, cracked, or excessively worn, it should be replaced.
Flip the Bar: Periodically flip the bar over to distribute wear evenly. This will extend the life of the bar.

How to Clean the Bar Groove:

Use a Bar Groove Cleaner: Use a specialized bar groove cleaner or a small screwdriver to remove sawdust and debris from the bar groove.
Clean Thoroughly: Clean the entire length of the bar groove, ensuring all debris is removed.

How to File the Bar Rails:

Use a Flat File: Use a flat file to file the bar rails.
File Evenly: File the rails evenly, removing any burrs or damage.
Maintain the Correct Angle: Maintain the correct angle when filing the rails to ensure the chain fits properly.

Key Takeaway: Regular bar maintenance is essential for extending its life and ensuring optimal cutting performance. Clean the bar groove, file the bar rails, and check for wear regularly.

Troubleshooting Common Chain Problems

Even with proper maintenance, you may encounter problems with your chainsaw chain. Knowing how to troubleshoot these issues can save you time and money.

Chain Dulls Quickly

If your chain is dulling quickly, there are several possible causes:

Cutting Dirty Wood: Cutting dirty or abrasive wood can dull your chain quickly.
Improper Sharpening: Improper sharpening techniques can weaken the chain and make it more prone to dulling.
Insufficient Lubrication: Insufficient lubrication can cause the chain to overheat and dull quickly.
Incorrect Chain Type: Using the wrong chain type for the type of wood you’re cutting can lead to premature dulling.

Troubleshooting Steps:

Clean the Wood: Before cutting, clean the wood to remove any dirt or debris.
Sharpen Properly: Use proper sharpening techniques to ensure the chain is sharpened correctly.
Lubricate Adequately: Ensure the chain is adequately lubricated during use.
Use the Correct Chain Type: Use the correct chain type for the type of wood you’re cutting.

My Experience: I once had a problem with my chain dulling very quickly. I realized I was cutting wood that was covered in dirt and sand. After cleaning the wood before cutting, the chain stayed sharp much longer.

Chain Keeps Derailing

If your chain keeps derailing, there are several possible causes:

Loose Chain: A chain that is too loose is more likely to derail.
Worn Bar: A worn or damaged bar can cause the chain to derail.
Incorrect Chain Length: Using a chain that is too long can cause it to derail.
Damaged Drive Sprocket: A damaged drive sprocket can cause the chain to derail.

Troubleshooting Steps:

Adjust Chain Tension: Ensure the chain is properly tensioned.
Inspect the Bar: Inspect the bar for wear and damage. Replace the bar if necessary.
Verify Chain Length: Ensure you are using the correct chain length for your saw and bar.
Inspect the Drive Sprocket: Inspect the drive sprocket for damage. Replace the sprocket if necessary.

Expert Insight: “A properly tensioned chain and a well-maintained bar are essential for preventing chain derailment,” says David Thompson, a chainsaw repair technician. “Check these components regularly to ensure they are in good condition.”

Chain is Smoking

If your chain is smoking, it indicates excessive friction and heat. This can be caused by:

Insufficient Lubrication: Insufficient lubrication is the most common cause of a smoking chain.
Dull Chain: A dull chain requires more force to cut, generating more friction and heat.
Over-Tensioned Chain: An over-tensioned chain can cause excessive friction and heat.

Troubleshooting Steps:

Check Lubrication: Ensure the chain is being properly lubricated.
Sharpen the Chain: Sharpen the chain to reduce friction and heat.
Adjust Chain Tension: Adjust the chain tension to ensure it is not too tight.

Chain is Vibrating Excessively

Excessive chain vibration can be caused by:

Dull Chain: A dull chain requires more force to cut, leading to increased vibration.
Unevenly Sharpened Chain: An unevenly sharpened chain can cause the saw to vibrate excessively.
Loose Chain: A chain that is too loose can vibrate excessively.
Worn Bar: A worn or damaged bar can cause the chain to vibrate.

Troubleshooting Steps:

Sharpen the Chain: Sharpen the chain to reduce vibration.
Sharpen Evenly: Ensure the chain is sharpened evenly.
Adjust Chain Tension: Ensure the chain is properly tensioned.
Inspect the Bar: Inspect the bar for wear and damage. Replace the bar if necessary.

Key Takeaway: Troubleshooting common chain problems can save you time and money. By identifying the cause of the problem and following the appropriate troubleshooting steps, you can get your chainsaw back up and running quickly.

Conclusion: Mastering Your MS170 Chain for Peak Performance

I’ve shared my knowledge about selecting, maintaining, and troubleshooting your MS170 chain. Remember, the right chain, properly sharpened and maintained, unlocks your saw’s full potential. It’s not just about cutting wood faster; it’s about working safer, smarter, and enjoying the process more.

Actionable Steps:

Review Your Chain: Take a close look at your current chain. Is it the right type for your needs? Is it properly sharpened?
Invest in Quality Tools: A good file guide, depth gauge tool, and bar groove cleaner are essential for proper maintenance.
Practice Makes Perfect: Don’t be afraid to experiment with different sharpening techniques and chain types to find what works best for you.
Stay Informed: Keep learning about chainsaw maintenance and safety. There are many resources available online and in print.

Final Thoughts:

The Stihl MS170 is a reliable and versatile chainsaw. By mastering the art of chain selection and maintenance, you can maximize its performance and enjoy years of trouble-free use. So, get out there, sharpen your chain, and start cutting!

Chain for MS170 Saws (5 Expert Tips for Efficient Cutting)