Measuring the chain length on a chainsaw is crucial for ensuring optimal performance and safety. An inaccurately sized chain can lead to decreased cutting efficiency, increased wear and tear, and potential hazards. Understanding the proper measuring technique is essential for any chainsaw user to maintain their equipment and operate it effectively.
To begin measuring the chain, locate the drive sprocket and the bar tip. The drive sprocket is the gear located at the base of the saw, while the bar tip is the end of the guide bar opposite the drive sprocket. Count the number of drive links that fit between these two points. Drive links are the links that connect the cutting teeth to the chain. The number of drive links you count will correspond to the correct chain length for your chainsaw.
Once you have determined the number of drive links, refer to your chainsaw’s owner’s manual to find the appropriate chain pitch. Chain pitch is the distance between the centers of two consecutive rivets on the chain. Common chain pitches for chainsaws include 0.325 inches, 3/8 inches, and 0.404 inches. Multiply the number of drive links by the chain pitch to calculate the total chain length in inches. For example, if you counted 50 drive links and the chain pitch is 0.325 inches, the total chain length would be 50 x 0.325 = 16.25 inches.
Determining Chain Length by Measuring the Saw Bar
Measuring the Saw Bar Length
When determining the chain length, start by measuring the saw bar, the metal guide that holds the chain. To do this, you’ll need a measuring tape or ruler.
* Position the saw bar on a flat surface. Make sure the saw bar is straight and level, not twisted or bent.
* Measure the length of the saw bar. Place the measuring tape or ruler at the base of the saw bar, where it meets the chainsaw’s body. Extend the measuring tool to the tip of the saw bar, excluding the nose sprocket.
* Record the measurement. Note down the length in inches or centimeters.
Determining Chain Size
Once you have the saw bar length, you can determine the matching chain size. Refer to the chainsaw manufacturer’s recommendations or consult a chain compatibility chart. The chart typically lists the appropriate chain length for each saw bar size.
Example:
| Saw Bar Length | Chain Length |
|—|—|
| 16 inches | 56 Drive Links |
| 18 inches | 60 Drive Links |
| 20 inches | 64 Drive Links |
Identifying Chain Pitch, Gauge, and Drive Link Count
1. Identifying Chain Pitch
The pitch of a chainsaw chain refers to the distance between the centers of adjacent drive links. It is typically measured in inches or millimeters, with common pitches including 0.325″, 0.375″, and 0.404″. To measure the chain pitch:
- Hold the chain taut.
- Count the number of drive links within a 12-inch section.
- Divide the number of drive links by 12 to determine the pitch.
2. Identifying Chain Gauge
The gauge of a chainsaw chain indicates the thickness of the drive links. It is also measured in inches or millimeters, with common gauges being 0.050″, 0.058″, and 0.063″. To measure the chain gauge:
- Locate the narrowest part of a drive link.
- Measure the thickness of this narrow section.
- The resulting measurement represents the chain gauge.
| Gauge (inches) | Thickness (inches) |
|---|---|
| 0.050 | 0.030 |
| 0.058 | 0.042 |
| 0.063 | 0.050 |
3. Identifying Drive Link Count
The drive link count refers to the total number of drive links in a chainsaw chain. To count the drive links:
- Locate the starting point of the chain (marked by a connecting link or a different color).
- Count each drive link as you move along the chain until you reach the starting point again.
- The total count represents the drive link count.
Using a Chainsaw to Measure Chain Length
When your chainsaw chain becomes dull or damaged, it’s crucial to measure its length to ensure you purchase the correct replacement. Here’s a step-by-step guide on how to measure chain length using a chainsaw:
1. Safety First
Before handling the chainsaw, always wear proper safety gear, including gloves, safety glasses, and earplugs. Ensure the chainsaw is turned off and disconnected from the power source.
2. Remove the Guide Bar and Chain
Loosen the nuts or bolts holding the guide bar to the chainsaw body. Carefully remove the guide bar and chain as a unit.
3. Determining the Chain Length
Method A: Link Counting
Count the number of drive links (the links that fit into the guide bar groove) on the chain. Multiply this number by 0.5 to determine the chain length in inches. For example, if you count 72 drive links, the chain length is 72 x 0.5 = 36 inches.
Method B: Chain Gauge Measurement
Find the chain gauge number stamped on the side of the chain. The gauge is the width of the drive link. Use a ruler or caliper to measure the width of the drive link in inches. Common chain gauges are 0.050″, 0.058″, and 0.063″.
Method C: Using a Chain Measuring Tool
Some chainsaw manufacturers provide a measuring tool specifically designed for this purpose. Simply wrap the tool around the chain and read the measurement directly from the tool’s scale.
Chain Length Table:
| Guide Bar Length (inches) | Chain Length (inches) |
|——————–|———————-|
| 12 | 23 |
| 14 | 25 |
| 16 | 27 |
| 18 | 29 |
| 20 | 31 |
Wrap the Chain Around the Template
Place the template around the chainsaw bar, ensuring the chain is taut and the teeth are facing the correct direction. Align the end of the chain with the marked measurement on the template.
Measure the Chain with a Measuring Tape
If a template is not available, use a measuring tape to determine the length of the chain. Start by aligning the zero mark of the measuring tape with the end of the chain. Measure along the chain, following the contour of the teeth, until you reach the end of the chain. Note the measurement displayed on the measuring tape.
Advantages of Using a Template or Measuring Tape
Utilizing a template or measuring tape offers several advantages:
- Accuracy: Both methods provide precise measurements, ensuring the chain is cut to the correct length.
- Convenience: Templates and measuring tapes are readily available and easy to use, making the process convenient and efficient.
- Consistency: Using templates or measuring tapes ensures consistent measurements, reducing the likelihood of inconsistencies that could lead to incorrect chain length.
- Time-Saving: These tools eliminate the need for guesswork and repetitive measurements, saving time and effort during the maintenance process.
Chain Length Measuring Options
| Method | Advantages | Disadvantages |
|---|---|---|
| Template | Precise, convenient, consistent | Requires specific template for chainsaw model |
| Measuring Tape | Versatile, readily available | Slightly less accurate, more time-consuming |
Measuring Chain Length
Chainsaw chains come in a variety of lengths to accommodate different sized chainsaws. Using the wrong length chain can damage the saw or pose a safety hazard. It is important to measure the chain length correctly before installing it on your saw. Here are some tips on how to do it:
Measuring Chain Length for Specific Chainsaw Models
Some chainsaw manufacturers provide a guide for the chain length that is compatible with specific models. If you have the owner’s manual for your chainsaw, refer to the guide for the correct chain length. You can also look up the chain length on the manufacturer’s website or by contacting the manufacturer directly.
Counting Drive Links
Drive links are the links that engage with the sprocket on the chainsaw’s guide bar. To count the number of drive links, follow these steps:
- Lay the chain out on a flat surface.
- Start counting the drive links from the front of the chain, where the cutting teeth are located.
- Count each link, including the connecting link (the link that connects the two ends of the chain).
The number of drive links will be the chain length in inches.
Measuring Chain Pitch
Chain pitch is the distance between two consecutive drive links. To measure chain pitch, follow these steps:
- Lay the chain out on a flat surface.
- Measure the distance between the centers of two consecutive drive links.
Chain pitch is typically measured in inches or millimeters. The most common chain pitches are 0.325 inches, 0.375 inches, and 0.404 inches.
Identifying the Chain Length on the Package
Many chainsaw chains come with the length printed on the packaging. Check the packaging for a label or sticker that indicates the chain length.
Referring to a Chain Length Chart
You can also refer to a chain length chart to find the correct chain length for your chainsaw model. Chain length charts are typically available online or in chainsaw retailers. The chart will list the chain length for different chainsaw models and brands.
| Chain Pitch (inches) | Drive Link Count | Chain Length (inches) |
|---|---|---|
| 0.325 | 64 | 20 |
| 0.325 | 68 | 21.6 |
| 0.325 | 72 | 23.2 |
| 0.375 | 66 | 24.75 |
| 0.375 | 72 | 27 |
Note that these are just a few examples and the actual chain length may vary depending on the specific chainsaw model.
Calculating Chain Length from Drive Link Count and Pitch
Determine the number of drive links in your chain. Drive links are the rectangular-shaped links that connect to the drive sprocket.
Multiply the number of drive links by the pitch of the chain. The pitch is the distance between two rivets on adjacent drive links, measured in inches or millimeters. For example, a chain with a pitch of 0.325 inches and 60 drive links would have a length of 19.5 inches (60 x 0.325).
Here are the most common chain pitches and their corresponding link counts:
| Pitch (inches) | Link Count |
|---|---|
| 0.325 | 50-80 |
| 0.375 | 40-60 |
| 0.404 | 30-45 |
| 0.500 | 20-28 |
Comparing Model-Specific Chainsaw Chain Lengths
Chain Length Variability
Chainsaw chains come in various lengths to accommodate different models and applications. The length of the chain is determined by the size and power of the chainsaw, as well as the specific task at hand.
Determining the Correct Length
It is essential to use the correct chain length for your chainsaw to ensure optimal performance and safety. Using a chain that is too long or too short can damage the machine or cause kickback, a dangerous situation where the chainsaw jerks backward and upward.
Model-Based Reference
To determine the correct chain length for your chainsaw, refer to the owner’s manual or consult the manufacturer’s website. Each chainsaw model typically has a specific recommended chain length range, which may vary based on bar size and cutting needs.
Determining Length Manually
If you don’t have access to the owner’s manual or manufacturer’s information, you can determine the chain length manually by following these steps:
- Measure the length of the guide bar from the base of the saw to the tip of the bar where the chain wraps around.
- Count the number of drive links on the chain, which are the links that engage with the sprocket on the saw.
- Use the table below to determine the corresponding chain length based on the bar length and number of drive links.
| Bar Length (inches) | Number of Drive Links | Chain Length (inches) |
|---|---|---|
| 12 | 40 | 20.0 |
| 14 | 44 | 22.0 |
| 16 | 48 | 24.0 |
| 18 | 52 | 26.0 |
| 20 | 56 | 28.0 |
Tips for Accurate Chain Length Measurement
Measuring the length of your chainsaw chain is crucial to ensure proper performance and safety. Follow these tips for accurate measurements:
Count the Drive Links
Drive links are the components that engage with the sprocket on the chainsaw bar. To count them, place the chain on a flat surface and count the number of teeth that fit between two consecutive rivets.
Measure the Bar Groove
The bar groove is the channel where the chain runs. Measure the length of the groove from the tip of the bar to the end. Subtract 1 inch (2.5 cm) to account for the overlap between the chain and the bar.
Calculate the Chain Length
Once you have the drive link count and bar groove length, calculate the chain length using the following formula:
| Formula | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Chain Length = (Drive Link Count + 2) x (Drive Link Pitch) + (Bar Groove Length – 1 inch)
where Drive Link Pitch is the distance between the centers of two consecutive drive links. Consider the Type of BarDifferent types of bars, such as full-skip and semi-skip, have different chain lengths. Check the manufacturer’s specifications for the recommended chain length for your bar. Error ToleranceAllow for a small error tolerance of ±1 link. This is acceptable as long as the chain is not too short or too long to engage properly with the bar and sprocket. Visual InspectionOnce you have measured the chain, visually inspect it for wear or damage. Worn or damaged chains can affect the accuracy of your measurement and should be replaced. How to Measure Chain Length on ChainsawFollow these steps to accurately measure the length of your chainsaw chain:
Troubleshooting Common Errors in Measuring Chain LengthHere are some common errors that can occur when measuring chain length and how to avoid them: Error 1: Counting the wrong linksMake sure to count the drive links, which have square-shaped teeth. Avoid counting the cutter links, which have chisel-shaped teeth. Error 2: Using the incorrect pitchThe pitch is the distance between the centers of three consecutive rivets. Measure the pitch accurately to ensure the correct chain length. Error 3: Forgetting to add the overlapThe overlap is the amount of chain that extends beyond the guide bar. Failure to add the overlap can result in a chain that is too short. Error 4: Rounding incorrectlyRound the result to the nearest even number to ensure the chain fits properly on the guide bar. Error 5: Using the wrong measuring toolUse a tape measure or a chain gauge to ensure an accurate measurement. Maintaining Proper Chain Length for Optimal PerformanceEnsuring the proper chain length is crucial for optimal chainsaw performance, efficiency, and safety. Here’s a comprehensive guide on how to measure chain length on a chainsaw: 1. Safety FirstAlways wear protective gear, including gloves, eye protection, and earplugs while handling the chainsaw and measuring the chain. 2. Find the Guide Bar LengthRefer to the chainsaw manufacturer’s specifications or check the guide bar itself. The length is typically marked in inches or centimeters. 3. Determine the Number of Drive LinksCount the number of drive links (teeth) on the chain. These are the rectangular metal teeth that connect the cutting teeth. 4. Measure the Drive Link PitchUse a ruler or caliper to measure the distance between the centers of three consecutive drive links. This is known as the pitch. 5. Calculate Chain LengthMultiply the number of drive links by the pitch to determine the chain length. For example, a chain with 72 drive links and a 0.325″ pitch would have a length of 23.4″. 6. Adjust the Chain TensionAdjust the chain tension according to the manufacturer’s instructions. Too loose or too tight chains can affect performance and safety. 7. Check the Chain for WearInspect the chain for signs of wear, such as dull or damaged cutting teeth. Replace or sharpen worn chains to maintain optimal performance. 8. Consider Cutting ConditionsHeavy cutting conditions may require a longer chain for increased reach and cutting speed. Consult the manufacturer’s recommendations for specific applications. 9. Choose the Correct Chain TypeSelect the appropriate chain type based on the type of wood you’ll be cutting and the power of your chainsaw. 10. Detailed Guide for Calculating Chain LengthTo avoid errors, follow these steps precisely:
How to Measure Chain Length on ChainsawMeasuring the chain length on a chainsaw is crucial for ensuring the proper fit and performance of the saw. Here are the steps involved in measuring the chain length:
Example: If you counted 20 drive links, the chain length would be 20 x 2 = 40 links. People Also AskHow do I measure chain pitch?Measure the distance between three consecutive rivets. Divide this distance by two to get the chain pitch. Common chain pitches are 0.325, 0.375, and 0.404.What if my chain is too long?A chain that is too long can cause the chainsaw to bind or jump. Cut off excess links using a chain grinder or hacksaw.What if my chain is too short?A chain that is too short will not engage properly with the drive sprocket. An authorized saw repair shop can replace the chain. |
