Chain Size For Stihl MS170 (5 Expert Tips For Better Cutting)

Are you tired of your Stihl MS170 feeling like it’s fighting the wood instead of slicing through it? A properly sized chain is the unsung hero of efficient cutting, and using the wrong one can turn a simple task into a frustrating ordeal. I’ve seen it happen countless times, and I’m here to help you avoid those pitfalls. This guide will arm you with the knowledge to choose the perfect chain for your MS170, maximizing its performance and your cutting efficiency. Let’s dive in and unlock the true potential of your chainsaw!

Chain Size for Stihl MS170: 5 Expert Tips for Better Cutting

Choosing the right chain for your Stihl MS170 is more than just a matter of picking one off the shelf. It’s about understanding the saw’s capabilities, the type of wood you’re cutting, and how to optimize for safety and efficiency. I’ve spent years working with chainsaws, and I’ve learned a thing or two about getting the most out of them.

1. Understanding the Stihl MS170 Chain Specifications

The Stihl MS170 is a lightweight, entry-level chainsaw perfect for homeowners and occasional users. However, its smaller engine size means it requires a chain specifically designed for its capabilities. Using a chain that’s too aggressive or the wrong size can strain the engine and lead to poor performance.

Pitch: The pitch refers to the distance between any three consecutive rivets on the chain, divided by two. The standard pitch for the Stihl MS170 is 3/8″ LP (Low Profile). This is crucial. Using a different pitch will prevent the chain from properly engaging with the saw’s sprocket.
Gauge: The gauge is the thickness of the drive links (the part of the chain that sits in the guide bar groove). The correct gauge for the MS170 is .050″ (1.3 mm). Again, this is critical for proper fit and function. A chain with the wrong gauge won’t sit properly in the guide bar, leading to excessive wear and potential kickback.
Drive Links: The number of drive links is the number of the links that fit into the groove of the guide bar. The Stihl MS170 typically uses a chain with 50 drive links when fitted with a 16″ (40 cm) guide bar. However, this can vary slightly depending on the specific bar length you are using. Always double-check your guide bar for the correct number of drive links.

Why are these specifications so important?

Imagine trying to fit a puzzle piece into the wrong spot. It just won’t work. The same principle applies to chainsaw chains. If the pitch, gauge, or drive link count is incorrect, the chain won’t fit properly, leading to:

Poor cutting performance: The chain will bind and struggle to cut efficiently.
Increased wear and tear: The chain, guide bar, and sprocket will wear out prematurely.
Safety hazards: An improperly fitted chain can increase the risk of kickback and other dangerous situations.

My Experience: I once had a client who ignored the gauge specification and tried to use a .058″ chain on his MS170, which was designed for a .050″ gauge. The saw vibrated excessively, the chain kept jumping off the bar, and he ended up damaging both the chain and the guide bar. A simple check of the specifications would have saved him time, money, and a lot of frustration.

Takeaway: Always verify the pitch, gauge, and drive link count before purchasing a chain for your Stihl MS170. Consult your owner’s manual or the markings on your guide bar for the correct specifications.

2. Choosing the Right Chain Type for Your Cutting Needs

Not all chainsaw chains are created equal. Different chain types are designed for specific cutting tasks and wood types. Selecting the right chain type can significantly improve your cutting performance and the lifespan of your saw.

Low-Kickback Chains: These chains are designed with features that reduce the risk of kickback, a dangerous situation where the saw suddenly jumps back towards the operator. They are a good choice for beginners and those who prioritize safety. These chains often have bumper drive links or guard links that help prevent the chain from grabbing and kicking back.
Full Chisel Chains: Full chisel chains have square-cornered cutters that are very aggressive and efficient at cutting through clean wood. However, they are more prone to kickback and require more skill to use safely. They also dull more quickly when cutting dirty or abrasive wood.
Semi-Chisel Chains: Semi-chisel chains have rounded cutters that are less aggressive than full chisel chains but more durable and forgiving. They are a good all-around choice for cutting various types of wood, including dirty or knotty wood.
Micro-Lite Chains: These chains are designed to be narrower and lighter than standard chains, reducing the amount of power required to drive them. They are a good choice for smaller chainsaws like the MS170, as they can improve cutting speed and efficiency.

Which chain type is best for the Stihl MS170?

For the Stihl MS170, I generally recommend either a low-kickback chain or a semi-chisel chain.

Low-kickback chains are an excellent choice for beginners and those who prioritize safety. The MS170 is often used by homeowners for light-duty tasks, and a low-kickback chain provides an extra layer of protection.
Semi-chisel chains offer a good balance of cutting performance and durability. They can handle a variety of wood types and are less prone to dulling than full chisel chains.

My Experience: I once used a full chisel chain on my MS170 to cut through some seasoned oak, and while it cut quickly, the chain dulled very quickly due to the hardness of the wood. I switched to a semi-chisel chain, and while it wasn’t quite as fast, it held its edge much longer and was ultimately a better choice for the task.

Takeaway: Consider your skill level and the type of wood you’ll be cutting when choosing a chain type for your Stihl MS170. Low-kickback chains are a good choice for beginners, while semi-chisel chains offer a good balance of performance and durability.

3. Measuring Your Existing Chain (If Applicable)

If you already have a chain for your Stihl MS170, measuring it can help you determine the correct replacement size. This is especially useful if the markings on the chain or guide bar are worn or illegible.

How to measure your chain:

Pitch: Use a ruler or measuring tape to measure the distance between any three consecutive rivets on the chain. Divide that number by two. The result should be 3/8″ (0.375″).
Gauge: Use a caliper to measure the thickness of the drive links. The measurement should be .050″ (1.3 mm).
Drive Links: Count the number of drive links on the chain. This is the most accurate way to determine the correct number of drive links for your replacement chain.

Important Considerations:

Wear and Stretch: Chains stretch over time due to wear and tear. A worn chain may appear to be slightly longer than its original length.
Inaccurate Markings: Markings on the chain or guide bar can sometimes be inaccurate or misleading. Always double-check your measurements.
Professional Assistance: If you are unsure about measuring your chain or determining the correct replacement size, consult a qualified chainsaw technician.

My Experience: I once had a customer who brought in a chain that he claimed was the correct size for his MS170. However, when I measured it, I discovered that it was actually a different pitch. He had been trying to force the wrong chain onto his saw, which could have damaged the sprocket and guide bar.

Takeaway: Measuring your existing chain can be a helpful way to determine the correct replacement size. However, always double-check your measurements and consult a professional if you are unsure.

4. Adjusting Chain Tension for Optimal Performance

Proper chain tension is crucial for safe and efficient cutting. A chain that is too loose can derail from the guide bar, while a chain that is too tight can overheat and damage the saw.

How to adjust chain tension:

Loosen the bar nuts: Use the wrench that came with your chainsaw to loosen the bar nuts on the side of the saw. Do not remove the nuts completely.
Locate the chain tensioning screw: The chain tensioning screw is usually located on the front or side of the saw, near the guide bar.
Adjust the tension: Use a screwdriver or the wrench to turn the tensioning screw. Turning the screw clockwise will tighten the chain, while turning it counterclockwise will loosen the chain.
Check the tension: The chain should be snug against the guide bar but still able to be pulled around the bar by hand. You should be able to pull the chain out from the guide bar approximately 1/8″ (3 mm) at the midpoint of the bar.
Tighten the bar nuts: Once you have adjusted the chain tension, tighten the bar nuts securely.

Important Considerations:

New Chains: New chains will stretch more than used chains. Check the tension frequently during the first few uses and adjust as needed.
Temperature: Chain tension can change with temperature. Check the tension before each use and adjust as needed.
Over-Tightening: Avoid over-tightening the chain, as this can cause excessive wear and tear on the chain, guide bar, and sprocket.

My Experience: I once neglected to check the chain tension on my MS170 before starting a cutting project. The chain was too loose, and it derailed from the guide bar several times. This not only slowed me down but also increased the risk of injury.

Takeaway: Proper chain tension is essential for safe and efficient cutting. Check the tension before each use and adjust as needed.

5. Maintaining Your Chain for Longevity and Safety

Regular chain maintenance is essential for extending the life of your chain and ensuring safe operation. A dull chain is not only less efficient but also more dangerous, as it requires more force to cut and increases the risk of kickback.

Chain Maintenance Tasks:

Sharpening: Sharpen your chain regularly using a chainsaw file or a chain grinder. A sharp chain will cut more efficiently and reduce the risk of kickback.
Cleaning: Clean your chain regularly to remove dirt, debris, and sap. This will help prevent the chain from dulling prematurely.
Lubrication: Keep your chain well-lubricated with chainsaw bar and chain oil. This will reduce friction and wear and tear.
Inspection: Inspect your chain regularly for damage, such as cracked or broken cutters. Replace the chain if it is damaged.

Chain Sharpening Techniques:

Filing: Use a round chainsaw file of the correct size to sharpen each cutter. Maintain the correct filing angle and depth.
Grinding: Use a chain grinder to sharpen the chain quickly and accurately. Follow the manufacturer’s instructions carefully.

My Experience: I once neglected to sharpen my chain for a long time, and it became so dull that it was almost impossible to cut through wood. I finally took the time to sharpen it, and the difference was amazing. The saw cut through wood effortlessly, and I was able to complete my project much faster.

Takeaway: Regular chain maintenance is essential for extending the life of your chain and ensuring safe operation. Sharpen, clean, lubricate, and inspect your chain regularly.

Bonus Tips for Stihl MS170 Chain Selection and Use

Beyond the core steps, here are some extra tips to help you make the most of your Stihl MS170 and its chain:

Consider the Wood Type: Softer woods like pine require less aggressive chains, while hardwoods like oak demand sharper and more durable chains. Adjust your chain selection accordingly.
Invest in Quality Chains: Cheaper chains might seem appealing, but they often dull quickly and are more prone to breaking. Investing in a high-quality chain from a reputable brand will save you money and frustration in the long run.
Proper Bar Maintenance: Regularly clean the guide bar groove and check for wear. A damaged guide bar can cause the chain to bind and wear prematurely.
Chain Break In: When you first get a new chain, run it at half speed for the first couple of minutes to help it break in. This will reduce stretching and improve its lifespan.
Sharpening Frequency: The more often you sharpen your chain, the easier it is to maintain a sharp edge. Don’t wait until the chain is completely dull before sharpening it.
Safety Gear is Key: Always wear appropriate safety gear, including eye protection, hearing protection, gloves, and chaps, when operating a chainsaw.
Read the Manual: Familiarize yourself with your Stihl MS170 owner’s manual. It contains valuable information about chain selection, maintenance, and safety.
Learn from Others: Watch videos, read articles, and talk to experienced chainsaw users to learn more about chain selection and maintenance.
Store Chains Properly: Store your chains in a dry place to prevent rust. Consider using a chain storage case or bag to protect them from damage.
Don’t Force It: If your chainsaw is struggling to cut through wood, don’t force it. Stop and check the chain tension, sharpness, and lubrication. Forcing the saw can damage the engine and increase the risk of kickback.

My Experience: I once saw a homeowner trying to cut through a large oak log with a dull chain on his MS170. He was forcing the saw so hard that the engine was smoking, and the chain was jumping and vibrating. I advised him to stop and sharpen the chain, and he was amazed at how much easier it was to cut through the log once the chain was sharp.

Takeaway: By following these bonus tips, you can extend the life of your chain, improve your cutting performance, and ensure safe operation of your Stihl MS170.

Troubleshooting Common Chain Problems

Even with proper chain selection and maintenance, you may encounter some common chain problems. Here’s how to troubleshoot them:

Chain Dulls Quickly: This could be due to cutting dirty or abrasive wood, using the wrong chain type, or improper sharpening techniques. Try using a semi-chisel chain for dirty wood, sharpening more frequently, or consulting a professional sharpener.
Chain Binds in the Cut: This could be due to insufficient chain tension, a dull chain, or a pinched guide bar. Check the chain tension, sharpen the chain, and inspect the guide bar for damage.
Chain Derails from the Bar: This could be due to excessive chain tension, a worn guide bar, or an improperly sized chain. Check the chain tension, inspect the guide bar for wear, and verify that you are using the correct chain size.
Chain Stretches Excessively: This is normal for new chains, but excessive stretching can indicate a worn chain or improper lubrication. Check the chain tension frequently, lubricate the chain properly, and replace the chain if it is excessively worn.
Chain Smokes: This is usually a sign of insufficient lubrication. Check the bar and chain oil level and make sure the oiler is working properly.

My Experience: I once had a customer who complained that his chain was constantly derailing from the bar. After inspecting his saw, I discovered that the guide bar was badly worn, with a groove that was too wide for the chain. Replacing the guide bar solved the problem.

Takeaway: By understanding the causes of common chain problems, you can troubleshoot them effectively and keep your Stihl MS170 running smoothly.

Safety First: Essential Precautions When Working with Chainsaws

No discussion about chainsaws is complete without emphasizing safety. Chainsaws are powerful tools that can cause serious injury if not used properly.

Read the Owner’s Manual: Familiarize yourself with the safety instructions and operating procedures for your Stihl MS170.
Wear Proper Safety Gear: Always wear eye protection, hearing protection, gloves, chaps, and sturdy footwear.
Maintain a Safe Distance: Keep bystanders and pets at least 50 feet away from your work area.
Inspect the Work Area: Before starting, inspect the work area for hazards such as rocks, wires, and branches.
Use a Firm Grip: Hold the chainsaw firmly with both hands.
Maintain a Stable Stance: Keep your feet firmly planted and maintain a balanced stance.
Be Aware of Kickback: Understand the causes of kickback and take steps to prevent it.
Never Cut Above Shoulder Height: Cutting above shoulder height is dangerous and can increase the risk of losing control of the saw.
Never Cut with One Hand: Always use both hands to operate a chainsaw.
Never Use a Chainsaw When Tired or Under the Influence: Chainsaws require focus and concentration.
Turn Off the Saw Before Setting It Down: Always turn off the saw and engage the chain brake before setting it down.
Carry the Saw Safely: When carrying the saw, engage the chain brake and keep the bar pointed away from your body.
Store the Saw Properly: Store the saw in a safe place, out of reach of children.

My Experience: I have witnessed several chainsaw accidents over the years, and they are always preventable. By following these safety precautions, you can significantly reduce your risk of injury.

Takeaway: Safety should always be your top priority when working with chainsaws. Follow these essential precautions to protect yourself and others.

Conclusion: Mastering Chain Selection for Your Stihl MS170

Choosing the right chain for your Stihl MS170 is a crucial step towards achieving efficient and safe cutting. By understanding the chain specifications, selecting the appropriate chain type, measuring your existing chain, adjusting chain tension, and maintaining your chain properly, you can maximize the performance of your saw and extend its lifespan. Remember to prioritize safety at all times and follow the essential precautions outlined in this guide. With the right knowledge and practices, you can confidently tackle any wood-cutting project with your Stihl MS170. Now go forth and cut with confidence!

Chain Size for Stihl MS170 (5 Expert Tips for Better Cutting)