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How To Shorten Chainsaw Chains Safely
Can you shorten a chainsaw chain? Yes, you can shorten a chainsaw chain, but it requires specific tools and a careful approach to ensure safety and proper function. Shortening a chainsaw chain is typically done to compensate for chain stretch, or when a shorter bar is fitted to the saw, or to deal with a worn-out section of the chain. This guide will walk you through the process of shortening your chainsaw chain safely and effectively.
Why You Might Need to Shorten a Chainsaw Chain
Several factors can lead to the need for shortening a chainsaw chain. Over time, chain wear chainsaw components, including the drive links, cutters, and rivets, can become worn. This wear, along with stretching, can lead to a chain that no longer fits the bar properly, even when you try to tighten chainsaw chain. Another common reason is fitting a shorter guide bar to your chainsaw. If you switch from a 20-inch bar to an 18-inch bar, for instance, the original chain will be too long. Sometimes, a specific section of the chain might be damaged, and removing a few links is a temporary fix to get you back to work. It’s crucial to address these issues promptly to maintain your chainsaw’s chainsaw cutting performance and prevent further damage to the saw or bar. A properly sized chain ensures efficient cutting and reduces strain on the engine and clutch.
Essential Tools and Safety Gear
Before you begin, gathering the right tools and safety gear is paramount. Working with chainsaw chains involves sharp metal and potentially dangerous tools.
Essential Tools:
- Chainsaw Chain Breaker Tool: This is the most critical tool for the job. It’s designed to push out the rivets that hold the chain links together.
- Pliers (Needle-nose and Standard): Useful for holding small parts and manipulating links.
- Vice or Clamping Device: To securely hold the chain while you work on it. A good bench vice is ideal.
- Hammer: A small to medium-sized hammer for tapping the chain breaker tool.
- Replacement Connecting Link (if needed): If you are removing a section to rejoin the chain, you’ll need a new connecting link.
- Safety Glasses or Face Shield: To protect your eyes from flying metal fragments.
- Work Gloves: To protect your hands from sharp edges and the tools.
- Chain File: For re-sharpening the cutters if they are dull. A dull chainsaw chain will perform poorly and make the shortening process more difficult if you also need to sharpen.
- Measuring Tape or Ruler: To accurately measure the desired chainsaw chain length.
Safety Gear:
- Safety Glasses/Face Shield: Non-negotiable.
- Sturdy Work Gloves: Essential for grip and protection.
- Closed-Toe Shoes: To protect your feet.
Step-by-Step Guide to Shortening Your Chainsaw Chain
Shortening a chainsaw chain involves removing specific links. The key is to remove an equal number of “tie straps” and “cutter links” from both sides of the chain to maintain its balance and proper functioning.
1. Dismount and Inspect the Chain
First, ensure your chainsaw is completely turned off and the spark plug wire is disconnected. This is a critical safety step to prevent accidental starting. Carefully remove the chain from the guide bar. Lay the chain out on a clean, flat surface. Inspect the entire chain for any signs of damage beyond what you intend to fix. Look for bent or cracked links, worn rivets, and any obvious damage to the cutters. If you find extensive damage, it might be more cost-effective and safer to replace the entire chain rather than trying to repair chainsaw chain by removing multiple sections.
2. Determine the Required Chain Length
Measure your existing chain against the guide bar it will be used on. Note the number of drive links that engage with the sprocket and the bar groove. If you are fitting a new, shorter guide bar, measure that bar to determine the correct chain length. Generally, you’ll need to count the number of drive links that sit inside the bar groove. This is your target chainsaw chain length.
3. Identify the Links to Remove
Chainsaw chains are made up of alternating cutter links (with the cutting teeth) and tie strap links (which connect the cutters). To shorten a chain, you must remove pairs of these links – one cutter link and its corresponding tie strap link on each side of the chain. This ensures the chain remains symmetrical. For example, if you need to remove two links, you’ll remove two tie straps and two cutters in total, one pair on each side. This maintains the correct drive and prevents the chain from running unevenly.
4. Secure the Chain
Place the section of the chain you intend to break in a vice. Ensure the rivet you need to push out is accessible by the chain breaker tool. The vice should hold the chain firmly but not so tightly that it distorts the links.
5. Using the Chain Breaker Tool
- Position the Tool: Align the pin of the chain breaker tool with the rivet of the link you want to remove. Make sure the chain is stable.
- Engage the Rivet: Slowly turn the handle of the chain breaker tool. You will feel resistance as the tool’s pin pushes against the rivet.
- Push the Rivet: Continue turning the handle. The rivet will start to push out of the chain link. You don’t need to push it out completely, just enough to separate the links. Be careful not to push it out so far that it damages the surrounding metal. The goal is to break the connection.
- Repeat for Other Side: Once you’ve separated one side of the chain (e.g., removed a tie strap), you will need to do the same on the other side of the chain at the designated spot to remove the corresponding cutter. This means finding the next set of tie strap and cutter you need to eliminate. Remember, you always remove a tie strap and a cutter to shorten the chain.
6. Remove the Excess Section
Once the rivets are sufficiently pushed out, you can gently pull the chain apart to remove the excess length. You should now have a shorter chain with the desired number of links.
7. Reconnecting the Chain (if necessary)
If you’ve removed a damaged section and need to rejoin the chain, you’ll use a new connecting link or re-rivet the existing ones if your breaker tool has that capability.
- Using a Connecting Link: Align the two ends of the chain. Position the new connecting link so that it bridges the gap, with the tie strap on one side and the cutter on the other.
- Secure the Connecting Link: You might need your pliers to help position the connecting link. Once in place, use the chain breaker tool again to push the rivet of the connecting link firmly into its place, securing the chain.
8. Test the Chain Tension
After shortening and reassembling, place the chain back on the guide bar. You’ll need to adjust chainsaw chain tension. The chain should be snug against the bar but still allow you to pull it around by hand. There should be minimal chain slack chainsaw. Most chainsaws have an adjustment mechanism on the side or front of the saw. Consult your chainsaw’s manual for specific instructions on how to tighten chainsaw chain correctly. A chain that is too loose can fly off the bar, while a chain that is too tight will cause excessive wear and strain.
Common Issues and Troubleshooting
When shortening a chainsaw chain, several problems can arise. Knowing how to address them can save you time and prevent frustration.
Chain Won’t Break
- Cause: Rivet is too tight, or the chain breaker tool isn’t aligned properly.
- Solution: Ensure the chain breaker tool’s pin is perfectly centered on the rivet. Apply steady, firm pressure. If it’s still difficult, try a slight tap with the hammer on the end of the chain breaker handle to help seat it. Make sure the chain is held securely in the vice.
Chain is Too Loose After Reassembly
- Cause: Incorrect number of links removed, or the chain has stretched significantly.
- Solution: Double-check your measurements and the number of links removed. If the chain still seems loose after proper tensioning, the chain wear chainsaw might be more advanced than initially thought, or you may have removed too many links. You might need to adjust the tension again, or if the chain is significantly worn, consider replacing it.
Chain Runs Unevenly or Jumps
- Cause: The chain is not symmetrical due to unequal removal of links, or a connecting link wasn’t secured properly.
- Solution: Carefully re-examine the chain for symmetry. Ensure you removed an equal number of tie straps and cutters from both sides. Verify that all rivets, especially on connecting links, are fully seated and secure. A damaged or worn sprocket can also cause this issue.
Difficulty Rejoining Chain
- Cause: Bent links or misalignment when using the chain breaker for rejoining.
- Solution: Gently align the chain ends using pliers. Ensure the connecting link fits smoothly. Use the chain breaker tool with care, ensuring it’s perpendicular to the rivet. If a link is significantly bent, you may need to remove that link and use a different section of the chain if possible, or replace the chain.
Maintaining Your Chainsaw Chain
Proper maintenance is key to extending the life of your chainsaw chain and ensuring optimal performance.
Regular Sharpening
A dull chainsaw chain not only makes cutting difficult but also puts more strain on your chainsaw and can lead to premature wear on the chain and bar. Sharpen your chain regularly using a high-quality file and guide. The filing angle is crucial for efficient cutting. Refer to your chainsaw manufacturer’s recommendations for the correct file size and sharpening angle.
Cleaning
After each use, clean your chain to remove sawdust, sap, and debris. A clean chain runs smoother and reduces wear. You can use a brush and a degreaser or solvent for thorough cleaning.
Proper Tensioning
Maintaining correct chainsaw chain tension is vital. A chain that’s too loose can derail, causing damage, while a chain that’s too tight increases friction and wear. Periodically check the tension while the chain is cool and adjust as needed. You should be able to pull the chain around the bar by hand. It should be snug but not binding.
Lubrication
Ensure your chainsaw’s automatic oiler is functioning correctly and the oil reservoir is full. Proper lubrication reduces friction between the chain, bar, and sprocket, which is critical for preventing overheating and wear.
Inspecting for Wear
Regularly inspect your chain for signs of wear, such as stretched loops, worn-out cutters, or damaged tie straps. If you notice significant chain wear chainsaw, it’s often better to replace the chain than to attempt extensive repairs.
When to Replace Your Chainsaw Chain
While shortening a chain can extend its life or adapt it to a new bar, there are times when replacement is the only safe and practical option.
- Excessive Stretch: If the chain has stretched significantly and you find yourself constantly adjusting the tension, it’s a sign of wear.
- Damaged Cutters: If several cutters are broken, chipped, or severely worn, it compromises cutting performance and safety.
- Bent or Cracked Links: Any visible cracks or significant bending in the links indicates structural weakness.
- Worn Rivets: If the rivets that hold the links together are worn down, the chain will be loose and difficult to tension properly.
- Multiple Repairs: If you’ve had to shorten or repair the chain multiple times, its overall integrity might be compromised.
A new chain can significantly improve your chainsaw cutting performance, making your work easier and safer. It’s an investment in the longevity of your chainsaw.
Frequently Asked Questions (FAQ)
Q1: How often should I check my chainsaw chain tension?
You should check your chainsaw chain tension before each use and periodically during extended cutting sessions, especially when the chain is new or after significant use. Always check when the chain is cool.
Q2: Can I shorten a chainsaw chain without a chain breaker tool?
While technically possible with extreme effort and makeshift tools, it is highly discouraged. A proper chain breaker tool ensures precision and safety. Attempting to do it without one significantly increases the risk of injury and damaging the chain or saw.
Q3: What is the average lifespan of a chainsaw chain?
The lifespan of a chainsaw chain varies greatly depending on usage, maintenance, and the quality of the chain. However, with proper care, sharpening, and tensioning, a good quality chain can last for many sharpening cycles. Generally, when a chain can no longer be effectively sharpened or has significant wear, it’s time for replacement.
Q4: Does shortening a chainsaw chain affect its balance?
If done correctly by removing an equal number of tie straps and cutters from both sides, shortening a chain should not significantly affect its balance. However, if done improperly, it can lead to uneven running and increased vibration.
Q5: What are the signs of a loose chainsaw chain?
A loose chainsaw chain will often “slap” against the bar during operation, may appear to sag away from the top of the bar when not under tension, and can easily come off the bar if not adjusted.
Q6: Is it always safe to repair a chainsaw chain by removing links?
It is safe to remove a few links to adjust length or remove a damaged section if done correctly with the proper tools. However, if the chain has significant overall wear, multiple damaged links, or is repeatedly stretching, it’s safer and more effective to replace the entire chain.
Q7: How do I know if my chainsaw chain is dull?
A dull chainsaw chain will require more force to cut, produce sawdust instead of chips, may burn the wood, and won’t cut straight. You’ll notice a significant decrease in chainsaw cutting performance.