When it comes to keeping your chainsaw running smoothly and efficiently, one of the most important aspects is ensuring that the chain is the correct length. Too short a chain can cause the saw to bind and stall, while too long a chain can lead to excessive wear and tear on the saw’s components. In this article, we will guide you through the simple steps on how to measure the length of your chainsaw chain so that you can keep your saw operating at its peak performance.
To begin, gather a few essential tools: a measuring tape, a piece of chalk or a marker, and a pair of safety gloves. Start by securing the chainsaw on a stable surface, making sure that the chain is not touching anything. Next, put on your safety gloves to protect your hands from the sharp edges of the chain. Using the measuring tape, carefully measure the distance from the tip of one drive link to the tip of the corresponding drive link on the opposite side of the chain. This measurement will give you the length of a single drive link.
Once you have measured the length of a single drive link, you need to multiply this value by the total number of drive links in the chain. To count the number of drive links, start from any drive link and count every other link until you reach the starting point. Remember to include the drive link you started from. Now, simply multiply the length of a single drive link by the total number of drive links to get the overall length of the chain. With this information, you can easily determine if your chain is the correct length for your chainsaw. If it is not, you can adjust the length by adding or removing links as needed.
Measure from Tip to Tip
To obtain the most accurate chain length measurement, follow these detailed guidelines when using the “tip to tip” method:
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Inspect the Chain
Examine the chain to ensure it is in good condition, free of any significant nicks or damage that could interfere with the measurement.
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Identify the Drive Links
Locate the drive links, which are the larger, rectangular-shaped links that engage with the chainsaw’s sprocket. Count the number of drive links from one end of the chain to the other, excluding the first and last links. The number of drive links represents the required chain length.
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Measure the Pitch and Gauge
Determine the pitch and gauge of the chain using a chain pitch gauge or consult the chainsaw’s manual. The pitch refers to the distance between drive links, while the gauge pertains to the thickness of the drive links. These measurements are crucial for selecting the appropriate replacement chain.
For further clarity, refer to the table below:
| Measurement | Definition | How to Measure |
|---|---|---|
| Chain Length | Total number of drive links | Count drive links from one end to the other (excluding first and last links) |
| Pitch | Distance between drive links | Use a chain pitch gauge |
| Gauge | Thickness of drive links | Use a chain pitch gauge |
Measure from Bar Stud to Bar Stud
This method involves measuring the distance between the bar studs on the chainsaw guide bar. It’s the most accurate technique, especially for chainsaws with semi-chisel or full-chisel chains.
Step 1: Determine the bar type.
Identify the type of chainsaw bar you have. Most modern chainsaws use either standard or low-profile bars. Refer to the chainsaw user manual or check the bar itself for information.
Step 2: Locate the bar studs.
Bar studs are small round protrusions on the inside of the chainsaw guide bar, where the chain links fit. Count the number of bar studs on your guide bar, excluding any studs at the end of the bar.
Determining Chain Length Based on Bar Studs
The following table provides a guide to determine the chain length based on the number of bar studs and bar type:
| Bar Type | Number of Bar Studs | Chain Length |
|---|---|---|
| Standard | 7 or 8 | 18 inches (45 cm) |
| Standard | 9 or 10 | 20 inches (50 cm) |
| Standard | 11 or 12 | 22 inches (55 cm) |
| Low-Profile | 7 or 8 | 16 inches (40 cm) |
| Low-Profile | 9 or 10 | 18 inches (45 cm) |
Use a Measuring Tape
This is the most straightforward method and requires only a measuring tape. Start by measuring the length of the guide bar. It is the metal blade that holds the chain. Once you have the length of the guide bar, add 2 inches to it. This will give you the minimum length of the chain you need.
Now, hold the measuring tape up to the chain and measure the length from the tip of one cutting tooth to the tip of the next cutting tooth. Multiply this number by the number of cutting teeth on the chain. This will give you the total length of the chain.
Compare the total length of the chain to the minimum length you calculated earlier. If the total length is less than the minimum length, you need to add links to the chain. If the total length is greater than the minimum length, you need to remove links from the chain.
Here are some tips for using a measuring tape to measure the length of a chainsaw chain:
- Make sure the measuring tape is straight and taut.
- Measure the length of the chain from the tip of one cutting tooth to the tip of the next cutting tooth.
- Multiply the number of cutting teeth on the chain by the length of one cutting tooth to get the total length of the chain.
- Compare the total length of the chain to the minimum length you calculated earlier to determine if you need to add or remove links.
| Measurement | How to Measure |
|---|---|
| Length of Guide Bar | Measure the length of the metal blade that holds the chain. |
| Length of Cutting Tooth | Measure the length from the tip of one cutting tooth to the tip of the next cutting tooth. |
| Number of Cutting Teeth | Count the number of cutting teeth on the chain. |
| Total Length of Chain | Multiply the length of one cutting tooth by the number of cutting teeth on the chain. |
Use a Chain Gauge
A chain gauge is a simple tool that can be used to accurately measure the length of a chainsaw chain. Chain gauges are available at most hardware stores and online retailers.
Here are the steps on how to use a chain gauge to measure the length of a chainsaw chain:
- Find the correct chain gauge for your chainsaw. Chain gauges are available in different sizes, so it is important to find one that is the correct size for your chainsaw. You can find the correct size chain gauge by checking the owner’s manual for your chainsaw.
- Place the chain gauge around the chain. The chain gauge should fit snugly around the chain, but it should not be so tight that it cannot be moved.
- Read the measurement on the chain gauge. The measurement will be in inches. The number of inches displayed is the length of your chainsaw chain loop.
- **Refer to the table below to determine the correct length of chain for your chainsaw. Chainsaw chain length is determined by the number of drive links. Drive links are the links with two teeth, so count the number of drive links on your chain to determine its length.
| Chain Length (in inches) | Number of Drive Links |
|---|---|
| 12 | 32 |
| 14 | 36 |
| 16 | 40 |
| 18 | 44 |
| 20 | 48 |
Measure the Saw Bar
To measure the saw bar, follow these steps:
- Hold the chainsaw in front of you with the bar pointing away from you.
- Use a measuring tape to measure the length of the bar from the tip of the blade to the end of the bar.
- Record the measurement in inches or centimeters.
Determining the Chain Size From the Saw Bar Length
To determine the chain size from the saw bar length, refer to the following table:
| Saw Bar Length (inches) | Chain Pitch (inches) | Number of Drive Links |
|---|---|---|
| 12 | 0.325 | 37-39 |
| 14 | 0.325 | 41-43 |
| 16 | 0.325 | 45-47 |
| 18 | 0.325 | 49-51 |
| 20 | 0.325 | 53-55 |
| 18 | 0.375 | 44 |
| 20 | 0.375 | 48 |
| 22 | 0.375 | 52 |
| 16 | 0.404 | 38 |
| 18 | 0.404 | 42 |
| 20 | 0.404 | 46 |
Note that this table provides approximate values and may vary depending on the specific chainsaw model.
Determine the Pitch and Gauge
Before counting the drive links, you need to determine the pitch and gauge of your saw chain. Pitch refers to the distance between the drive links, while gauge refers to the thickness of the drive links.
Determine the Pitch
| Chain Pitch | Distance Between Drive Links |
|---|---|
| 1/4″ | 1/4 inch (6.35 mm) |
| 3/8″ | 3/8 inch (9.53 mm) |
| .325″ | .325 inch (8.26 mm) |
| .404″ | .404 inch (10.26 mm) |
Determine the Gauge
| Gauge | Thickness of Drive Links |
|---|---|
| .043″ | .043 inch (1.09 mm) |
| .050″ | .050 inch (1.27 mm) |
| .058″ | .058 inch (1.47 mm) |
| .063″ | .063 inch (1.60 mm) |
Check the Manufacturer’s Recommendations
Before replacing or adjusting the chain on your chainsaw, it’s crucial to consult the manufacturer’s specifications. The recommended chain length varies depending on the model and size of the chainsaw. Refer to the owner’s manual or the manufacturer’s website for the specific chain length and pitch recommended for your particular chainsaw.
Measuring the Chain Length
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Wrap the chain around the bar
Position the chain on the guide bar and loop it around completely.
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Align the drive links with the bar groove
Ensure that the drive links of the chain align with the groove on the underside of the guide bar.
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Tighten the chain
Adjust the chain tension as per the manufacturer’s instructions to create a snug fit.
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Count the number of drive links
Start from the first drive link on the lower side of the guide bar and count the number of drive links until you reach the last drive link on the upper side.
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Double the count
Multiply the count obtained in step 4 by two to determine the total number of drive links in the chain.
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Consult the drive link table
Refer to the manufacturer’s specifications or the below table to determine the corresponding chain length based on the count of drive links.
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Verify and correct
Check the measured chain length against the recommended chain length specified by the manufacturer. Adjust the chain accordingly if necessary.
Calibrate Your Measuring Device
Before you begin measuring the chain length, it is important to calibrate your measuring device. This will ensure that your measurements are accurate. To calibrate your measuring device, follow these steps:
- Wrap the measuring device around a known length of chain, such as a 12-inch piece of chain.
- Make sure that the measuring device is snug against the chain, but not so tight that it distorts the chain.
- Read the measurement on the measuring device.
- If the measurement is not accurate, adjust the measuring device until it is.
Once your measuring device is calibrated, you are ready to measure the chain length on your chainsaw.
Measuring the Chain Length
To measure the chain length on your chainsaw, follow these steps:
- Place the chain on a flat surface.
- Wrap the measuring device around the chain, starting at the end of the bar.
- Make sure that the measuring device is snug against the chain, but not so tight that it distorts the chain.
- Measure the length of the chain from the end of the bar to the end of the chain.
- Record the measurement in inches.
The chain length should be specified in the owner’s manual for your chainsaw. If you are not sure what the correct chain length is for your chainsaw, consult with a qualified technician.
The following table shows the recommended chain lengths for some of the most common chainsaw models:
| Chainsaw Model | Chain Length |
|---|---|
| Stihl MS 180 | 14 inches |
| Husqvarna 142 | 16 inches |
| Echo CS-310 | 18 inches |
| McCulloch CS 350 | 20 inches |
Determine the Cutting Length
To determine the cutting length of a chainsaw chain, follow these steps:
- Identify the drive links: The drive links are the links that engage with the sprocket on the chainsaw bar. They are typically narrower and have a rectangular shape.
- Count the drive links: Count the number of drive links along the entire length of the chain, including the links at each end where the chain is connected to the bar.
- Multiply by the pitch: The pitch is the distance between the centers of adjacent drive links. The pitch is usually stamped on the chainsaw bar or the chain itself. Multiply the number of drive links by the pitch to get the cutting length.
For example, if you have a chain with 72 drive links and a pitch of 0.325 inches, the cutting length would be 72 x 0.325 = 23.4 inches.
Table: Chain Length Calculation
| Number of Drive Links | Pitch (inches) | Cutting Length (inches) |
|---|---|---|
| 64 | 0.325 | 20.8 |
| 72 | 0.375 | 27 |
| 80 | 0.404 | 32.32 |
How to Measure Chain Length on Chainsaw
Measuring the length of a chainsaw chain is crucial for ensuring proper fit and optimal performance. Here’s a comprehensive guide to help you accurately measure your chainsaw chain:
Step 1: Gather Materials
You’ll need the following equipment:
- Measuring tape or ruler
- Chain hook or needle-nose pliers
Step 2: Remove the Chain
To access the chain, you’ll need to remove it from the chainsaw. Follow the manufacturer’s instructions for your specific model.
Step 3: Identify the Drive Links
Drive links are the elongated metal links that connect the cutting teeth. On most chainsaws, drive links are colored differently or have a different shape than the cutting teeth.
Step 4: Mark and Count Drive Links
Use a chain hook or needle-nose pliers to carefully grasp one end of the chain. Pull the chain away from itself to separate the drive links.
Make a mark on the first drive link and then continue pulling the chain, counting each drive link as you go.
Stop when you reach the marked drive link again. The number of drive links you counted represents the chain length.
Step 5: Measure Pitch
The chain pitch is the distance between the centers of three consecutive rivets. To measure the pitch, use a measuring tape or ruler and measure the distance between two adjacent rivets.
Example:
If you count 72 drive links and measure a pitch of 3/8″, your chainsaw chain length is 72 divided by 4 (since there are 4 drive links per pitch) = 18″.
People Also Ask
Q: What measurement system should I use to measure chain length?
A: Use the metric system to measure the length in centimeters or inches.
Q: How do I know if I measured the chain length correctly?
A: Refer to your chainsaw’s manufacturer manual for the recommended chain length. It should match your measured length.
Q: Can I use any chain length on my chainsaw?
A: No, using an incorrect chain length can damage the chainsaw or affect its performance. Always choose a chain length that matches the manufacturer’s specifications.
