Husqvarna Chainsaw 445 Chain Size Guide (Pro Tips For Optimal Cutting)

Let’s transform your Husqvarna 445 chainsaw from a potential frustration into a wood-devouring beast! The key? Understanding and mastering chain selection and maintenance. It’s not just about slapping any old chain on and hoping for the best. It’s about optimizing your saw for performance, safety, and longevity. I’ve spent years in the woods, from felling trees for construction to prepping firewood for the long winter months. I’ve learned firsthand how critical the right chain is. A dull or incorrect chain can turn a simple task into a back-breaking ordeal. Conversely, the perfect chain, properly sharpened and maintained, makes even the toughest jobs feel manageable. This guide is my way of sharing that knowledge with you, so you can avoid the pitfalls and unlock the true potential of your Husqvarna 445.

Husqvarna Chainsaw 445 Chain Size Guide (Pro Tips for Optimal Cutting)

Choosing the right chain for your Husqvarna 445 chainsaw is crucial for optimal cutting performance, safety, and the longevity of your saw. It’s not a one-size-fits-all situation. Several factors come into play, including bar length, chain pitch, gauge, and the type of wood you’ll be cutting. Getting it wrong can lead to poor cutting, increased wear and tear on your saw, and even dangerous kickback. This guide will walk you through everything you need to know to select the perfect chain for your 445, backed by my own experiences and practical advice.

Understanding Key Chainsaw Chain Concepts

Before diving into the specifics of the Husqvarna 445, let’s define some essential terms:

Pitch: The distance between any three consecutive rivets on the chain, divided by two. It’s usually expressed in inches (e.g., .325″, 3/8″). Pitch determines the size of the drive sprocket and bar sprocket.
Gauge: The thickness of the drive links (the part of the chain that fits into the guide bar groove). It’s also expressed in inches (e.g., .050″, .058″). The gauge must match the width of the guide bar groove.
Drive Links: The number of drive links determines the overall length of the chain and ensures it fits properly on the bar.
Cutter Type: Different cutter designs are available, each suited for specific applications. Common types include:
- Full Chisel: Aggressive cutting, ideal for clean wood.
- Semi-Chisel: More forgiving, suitable for dirty or frozen wood.
- Low-Profile (Micro-Chisel): Reduced kickback, good for beginners.
- Chipper: Durable and resistant to dulling, good for abrasive wood.
Kickback: The sudden upward or backward movement of the chainsaw bar, which can be dangerous. Low-kickback chains are designed to reduce this risk.
Green Wood vs. Seasoned Wood: Green wood is freshly cut, with high moisture content. Seasoned wood has been dried, reducing its moisture content. Green wood is generally easier to cut but dulls chains faster, while seasoned wood requires a sharper chain.

Determining the Correct Chain Size for Your Husqvarna 445

The Husqvarna 445 is a versatile saw that can accommodate different bar lengths and chain sizes. However, using the wrong chain can lead to problems. Here’s how to determine the correct size:

Check Your Guide Bar: The guide bar usually has the chain pitch, gauge, and number of drive links stamped on it. This is the easiest way to find the correct information. Look closely near the mounting end of the bar.
Consult Your Owner’s Manual: The owner’s manual provides the recommended chain specifications for your specific model. Always refer to the manual as the definitive source of information.
Measure Your Old Chain (If Available): If you have the old chain, you can measure the pitch and gauge. Count the drive links to determine the chain length.
Husqvarna 445 Chain Specifications (Typical):
- Pitch: .325″
- Gauge: .050″
- Drive Links: Varies depending on bar length. Common lengths include 64, 66, or 72 drive links for 16″, 18″ and 20″ bars respectively.
Important Note: These are typical specifications, but it’s always best to confirm the exact requirements for your specific Husqvarna 445 and bar combination.

Step-by-Step Guide to Selecting the Right Chain

Here’s a detailed step-by-step guide to ensure you select the correct chain for your Husqvarna 445:

Step 1: Identify Your Bar Length

Measure the length of your guide bar from the tip to where it enters the chainsaw body. This is usually expressed in inches (e.g., 16″, 18″, 20″). The Husqvarna 445 is commonly used with these bar lengths.

Step 2: Determine the Pitch

As mentioned earlier, the pitch is typically .325″ for the Husqvarna 445. You can confirm this by checking your guide bar or owner’s manual. This is a critical measurement because the chain pitch MUST match the drive sprocket on the chainsaw.

Step 3: Determine the Gauge

The gauge is typically .050″ for the Husqvarna 445. Again, confirm this by checking your guide bar or owner’s manual. The chain gauge MUST match the width of the groove on your guide bar. Using a chain with the wrong gauge will result in either a chain that is too loose or one that won’t fit at all.

Step 4: Count the Drive Links

This is where things can get a little tricky. The number of drive links depends on the bar length. Here’s a general guideline:

16″ Bar: Typically requires 64 drive links.
18″ Bar: Typically requires 66 drive links.
20″ Bar: Typically requires 72 drive links.

How to Count Drive Links:

Lay the chain flat on a surface.
Identify a drive link (the part that fits into the guide bar groove).
Count each drive link around the entire chain.

Important Tip: If you’re unsure, it’s always better to err on the side of having too many drive links. You can always remove excess links with a chain breaker tool. However, you can’t add links if the chain is too short.

Step 5: Choose the Cutter Type

The cutter type depends on the type of wood you’ll be cutting and your skill level.

For clean wood (felling trees, limbing): Full chisel cutters provide the fastest and most efficient cutting. However, they dull quickly if they come into contact with dirt or debris.
For dirty or frozen wood (firewood preparation, storm cleanup): Semi-chisel cutters are more durable and forgiving. They don’t cut as fast as full chisel cutters, but they hold their edge longer.
For beginners or those concerned about kickback: Low-profile (micro-chisel) cutters offer reduced kickback and are easier to control.

Step 6: Consider Safety Features

Low-kickback chains are a good choice for beginners or anyone concerned about safety. These chains have features that reduce the risk of kickback, such as guard links or bumper drive links. I always recommend using a low-kickback chain, especially when teaching someone new to chainsaw operation. It provides an extra layer of safety and helps build confidence.

Step 7: Purchase Your Chain

Once you’ve determined the correct pitch, gauge, drive link count, and cutter type, you can purchase your chain. You can find chains at most hardware stores, chainsaw dealers, or online retailers.

Example Scenario:

Let’s say you have a Husqvarna 445 with an 18″ bar and you primarily cut firewood from seasoned oak. Here’s how you would select the right chain:

Bar Length: 18″
Pitch: .325″ (confirmed by checking the bar)
Gauge: .050″ (confirmed by checking the bar)
Drive Links: 66 (typical for an 18″ bar)
Cutter Type: Semi-chisel (for durability when cutting seasoned oak)
Safety Features: Low-kickback (recommended for added safety)

You would then look for a chain that matches these specifications: .325″ pitch, .050″ gauge, 66 drive links, semi-chisel cutters, and low-kickback features.

Pro Tips for Optimal Cutting Performance

Once you’ve selected the right chain, here are some pro tips to ensure optimal cutting performance:

Sharpen Your Chain Regularly: A sharp chain is essential for efficient cutting and safety. Dull chains require more force, increasing the risk of kickback and putting unnecessary strain on your saw. I recommend sharpening your chain after every few tanks of fuel, or whenever you notice a decrease in cutting performance.
Use the Correct Sharpening Angle: The correct sharpening angle is crucial for maintaining the chain’s cutting ability. Consult your owner’s manual for the recommended angle. Using the wrong angle can damage the chain and reduce its lifespan.
Maintain Proper Chain Tension: Proper chain tension is essential for safety and performance. A chain that is too loose can derail, while a chain that is too tight can overheat and break. Check the chain tension before each use and adjust as needed. The chain should be snug against the bar but still able to be pulled around by hand.
Lubricate Your Chain Regularly: Chain lubrication is essential for reducing friction and wear. Use a high-quality bar and chain oil and check the oil level frequently. I prefer using a bio-degradable bar and chain oil to minimize environmental impact.
Clean Your Chainsaw Regularly: Sawdust and debris can accumulate on your chainsaw, reducing its performance and lifespan. Clean your chainsaw regularly with a brush and compressed air. Pay particular attention to the air filter, cooling fins, and bar groove.
Inspect Your Chain Regularly: Check your chain for damage, such as cracked or broken cutters, bent drive links, or loose rivets. Replace the chain if you find any damage.

Chainsaw Chain Sharpening: A Detailed Guide

Sharpening your chainsaw chain is a critical skill for any chainsaw user. A dull chain not only makes cutting difficult but also increases the risk of kickback and puts unnecessary strain on your saw. Here’s a detailed guide to sharpening your chain:

Tools You’ll Need:

Chainsaw File: A round file specifically designed for sharpening chainsaw chains. The correct file size depends on the chain pitch. For a .325″ pitch chain, a 5/32″ (4.0mm) file is typically used.
File Guide: A file guide helps you maintain the correct sharpening angle and depth.
Flat File: A flat file for filing the depth gauges (rakers).
Depth Gauge Tool: A tool for checking the depth gauge height.
Vise: A vise to hold the chainsaw bar securely while sharpening.
Gloves: To protect your hands.
Safety Glasses: To protect your eyes from flying metal filings.

Step-by-Step Sharpening Process:

Secure the Chainsaw: Place the chainsaw in a vise, clamping the bar securely. Make sure the chain is free to move around the bar.
Identify the Cutter Type: Determine whether you have full chisel, semi-chisel, or another type of cutter. This will affect the sharpening angle.
Determine the Sharpening Angle: Consult your owner’s manual for the recommended sharpening angle for your chain. This angle is typically between 25 and 35 degrees.
Position the File: Place the file guide on the chain, aligning it with the cutter you’re about to sharpen. The file should be positioned at the correct sharpening angle.
Sharpen the Cutter: Using smooth, even strokes, push the file across the cutter from the inside out. Follow the contours of the cutter and maintain the correct sharpening angle. Apply light pressure and avoid forcing the file. I usually count the number of strokes I make on each cutter to ensure consistency.
Repeat for All Cutters: Repeat the sharpening process for all cutters on the chain, alternating between the left and right sides.
File the Depth Gauges (Rakers): The depth gauges (rakers) are the small protrusions in front of each cutter. They control the depth of cut. As you sharpen the cutters, the depth gauges become too high and need to be filed down. Use a depth gauge tool to check the height of the depth gauges. If they are too high, use a flat file to file them down to the correct height. Consult your owner’s manual for the recommended depth gauge height.
Check Your Work: After sharpening all the cutters and filing the depth gauges, inspect your work carefully. Make sure all the cutters are sharp and the depth gauges are at the correct height.
Lubricate the Chain: After sharpening, lubricate the chain with bar and chain oil.

Tips for Effective Sharpening:

Use a Sharp File: A dull file will make sharpening more difficult and less effective. Replace your file when it becomes dull.
Maintain a Consistent Angle: Maintaining a consistent sharpening angle is crucial for achieving a sharp, even edge.
Don’t Over-Sharpen: Over-sharpening can weaken the chain and reduce its lifespan.
Practice Makes Perfect: Sharpening a chainsaw chain takes practice. Don’t be discouraged if you don’t get it right the first time. Keep practicing, and you’ll eventually become proficient.

My Personal Experience:

I remember one time when I was felling trees for a cabin project in the mountains. I was using a dull chain, and it was taking me forever to cut through the trees. I was getting frustrated and exhausted. Finally, I decided to take a break and sharpen my chain. After sharpening, the difference was incredible. The chainsaw cut through the trees like butter, and I was able to finish the job much faster and with less effort. That experience taught me the importance of keeping my chain sharp.

Troubleshooting Common Chain Problems

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

Chain Dulls Quickly:
- Cause: Cutting dirty or abrasive wood, improper sharpening, insufficient lubrication.
- Solution: Use a more durable chain, sharpen more frequently, use high-quality bar and chain oil, avoid cutting dirty wood if possible.
Chain Binds or Jams in the Cut:
- Cause: Dull chain, improper chain tension, pinched bar, cutting wood that is too thick for the saw.
- Solution: Sharpen the chain, adjust chain tension, use a wedge to prevent the bar from being pinched, use a larger saw for thicker wood.
Chain Comes Off the Bar Frequently:
- Cause: Loose chain tension, worn bar, damaged drive sprocket, incorrect chain size.
- Solution: Adjust chain tension, replace the bar, replace the drive sprocket, ensure you are using the correct chain size.
Chain Cuts at an Angle:
- Cause: Uneven sharpening, damaged cutters, bent bar.
- Solution: Sharpen the chain evenly, replace damaged cutters, replace the bar.
Excessive Vibration:
- Cause: Loose chain, damaged bar, worn bearings, unbalanced chain.
- Solution: Adjust chain tension, replace the bar, replace the bearings, replace the chain.

Case Study: Optimizing Chain Selection for Firewood Production

I once helped a local firewood business improve their efficiency by optimizing their chain selection. They were using a generic chain on their Husqvarna 445s, and they were experiencing frequent chain dulling and slow cutting speeds.

The Problem:

The business was cutting a variety of wood types, including oak, maple, and birch. They were using the same chain for all types of wood, regardless of its condition (green or seasoned). This resulted in frequent chain dulling and reduced productivity.

The Solution:

I recommended that they use different chains for different types of wood. For seasoned oak, I suggested using a semi-chisel chain for its durability. For green maple and birch, I recommended using a full chisel chain for its faster cutting speed. I also recommended that they sharpen their chains more frequently and use a high-quality bar and chain oil.

The Results:

After implementing these changes, the business saw a significant improvement in their efficiency. Chain dulling was reduced, cutting speeds increased, and overall productivity improved. They were able to produce more firewood in less time, resulting in increased profits.

Key Takeaways:

Match the chain to the wood type: Using the right chain for the job can significantly improve cutting performance and reduce chain dulling.
Sharpen frequently: A sharp chain is essential for efficient cutting.
Use high-quality bar and chain oil: Proper lubrication reduces friction and wear, extending the life of the chain.

Safety First: Chainsaw Safety Precautions

Operating a chainsaw can be dangerous if proper safety precautions are not followed. Here are some essential safety tips:

Wear Appropriate Safety Gear: Always wear a helmet, safety glasses or face shield, hearing protection, gloves, chainsaw chaps, and sturdy boots.
Read the Owner’s Manual: Familiarize yourself with the chainsaw’s operation and safety features.
Inspect the Chainsaw Before Each Use: Check the chain tension, oil level, and all other components.
Start the Chainsaw on the Ground: Never drop-start a chainsaw.
Maintain a Firm Grip: Use both hands and keep a firm grip on the chainsaw at all times.
Keep a Clear Work Area: Remove any obstacles from the work area.
Be Aware of Kickback: Understand the causes of kickback and how to avoid it.
Never Cut Above Shoulder Height: Cutting above shoulder height is dangerous and increases the risk of losing control of the chainsaw.
Take Breaks: Chainsaw operation can be tiring. Take frequent breaks to avoid fatigue.
Never Operate a Chainsaw Under the Influence of Drugs or Alcohol: This is extremely dangerous and can lead to serious injury or death.
Store the Chainsaw Properly: Store the chainsaw in a safe place, out of reach of children.

I’ve witnessed firsthand the devastating consequences of chainsaw accidents. It’s crucial to take safety seriously and follow all recommended precautions. A moment of carelessness can lead to a lifetime of regret.

Choosing the Right Bar and Chain Oil

The right bar and chain oil is crucial for keeping your chain lubricated, reducing friction, and extending the life of your chainsaw. Here’s what to look for:

High Viscosity: A high-viscosity oil will cling to the chain and bar, providing better lubrication.
Tackifiers: Tackifiers are additives that help the oil adhere to the chain and bar, even at high speeds.
Anti-Wear Additives: Anti-wear additives protect the chain and bar from wear and tear.
Low-Temperature Performance: Choose an oil that performs well in cold weather, especially if you live in a cold climate.
Biodegradability: Consider using a biodegradable bar and chain oil to minimize environmental impact. I personally prefer using bio-degradable oils whenever possible.

Types of Bar and Chain Oil:

Petroleum-Based Oils: These are the most common type of bar and chain oil. They are relatively inexpensive and provide good lubrication. However, they are not biodegradable.
Vegetable-Based Oils: These oils are made from vegetable oils, such as canola or soybean oil. They are biodegradable and environmentally friendly. However, they may not provide as good lubrication as petroleum-based oils.
Synthetic Oils: These oils are made from synthetic materials. They provide excellent lubrication and wear protection. However, they are more expensive than petroleum-based or vegetable-based oils.

My Recommendation:

I recommend using a high-quality petroleum-based or synthetic bar and chain oil with tackifiers and anti-wear additives. If you are concerned about the environment, consider using a biodegradable vegetable-based oil.

Beyond the Basics: Advanced Techniques for Wood Processing

Once you’ve mastered the basics of chain selection and maintenance, you can explore some advanced techniques for wood processing:

Felling Techniques: Learn proper felling techniques to safely and efficiently fell trees. This includes understanding tree lean, wind direction, and escape routes.
Limbing Techniques: Learn how to safely and efficiently limb trees. This includes using proper body positioning and avoiding kickback.
Bucking Techniques: Learn how to buck logs into desired lengths. This includes using proper cutting techniques and avoiding pinching the bar.
Debarking Logs: Debarking logs can improve their drying time and prevent insect infestation. There are several methods for debarking logs, including using a drawknife, a debarking spud, or a mechanical debarker.
Splitting Firewood: Splitting firewood can be done manually with an axe or maul, or with a hydraulic log splitter. Hydraulic log splitters are more efficient and less strenuous.
Stacking Firewood: Proper firewood stacking is essential for drying and preventing rot. Stack the firewood in a well-ventilated area, off the ground, and with the bark side up.
Wood Drying Techniques: Learn how to properly dry wood to reduce its moisture content and prevent warping or cracking. This includes air drying, kiln drying, and solar drying.

Strategic Advantages of Proper Chain Selection and Maintenance

Investing time and effort in proper chain selection and maintenance offers several strategic advantages:

Increased Efficiency: A sharp chain cuts faster and more efficiently, saving you time and energy.
Reduced Strain on Your Saw: A sharp chain puts less strain on your saw’s engine and components, extending its lifespan.
Improved Safety: A sharp chain is less likely to kick back, reducing the risk of injury.
Lower Operating Costs: A sharp chain requires less fuel and oil, reducing your operating costs.
Professional Results: A sharp chain produces cleaner, more professional cuts.

Practical Next Steps

Ready to put your knowledge into practice? Here are some practical next steps:

Inspect Your Current Chain: Check your chain for wear, damage, and sharpness.
Identify Your Chain Specifications: Determine the pitch, gauge, and drive link count for your Husqvarna 445.
Sharpen Your Chain: Sharpen your chain using the techniques described in this guide.
Purchase a New Chain (If Needed): If your chain is worn or damaged, purchase a new chain that matches your saw’s specifications.
Practice Safe Chainsaw Operation: Always follow safety precautions when operating a chainsaw.
Experiment with Different Cutter Types: Try different cutter types to see which works best for your needs.
Attend a Chainsaw Safety Course: Consider attending a chainsaw safety course to learn more about safe operation and maintenance.

Conclusion: Mastering Your Husqvarna 445

Choosing the right chain for your Husqvarna 445 and maintaining it properly is essential for optimal cutting performance, safety, and the longevity of your saw. By following the steps and tips outlined in this guide, you can transform your chainsaw from a potential frustration into a powerful and efficient tool. Remember to prioritize safety and always follow recommended precautions. With a little knowledge and practice, you can master your Husqvarna 445 and tackle any wood processing task with confidence. And don’t hesitate to reach out to experienced chainsaw users or professionals for guidance and support. The woods are full of knowledge, just waiting to be shared.

Husqvarna Chainsaw 445 Chain Size Guide (Pro Tips for Optimal Cutting)