Medium-duty chainsaws in the 50 to 60 cubic centimeter class commonly accept a 72-drive-link chain on a 20-inch bar. These saws—popular among homeowners, farmers, and rural property owners—typically use a 3/8-inch pitch chain with a 0.050-inch gauge. Brands such as Stihl, Husqvarna, and Echo offer models that match this configuration, though the exact specifications can vary between manufacturers and even between different bars on the same saw model.
Before purchasing a replacement chain, you must verify four key factors: the chain pitch, the bar gauge, the drive link count, and the bar mount type. A 72-link chain designed for one pitch or gauge will not fit a bar expecting a different configuration, even if the bar length is identical. This article explains what each specification means, which chainsaws commonly use this combination, and how to confirm compatibility before you buy.
Understanding the Question: What Do ’72 Link’ and ’20-Inch Bar’ Mean?
When someone asks what chainsaw takes a 72-link chain on a 20-inch bar, they are looking for either a replacement chain match or confirmation that their saw uses this configuration. To answer the question properly, you need to understand what these terms actually describe.
A drive link is the individual tooth-like component on the bottom of a chainsaw chain that engages with the sprocket to move the chain around the bar. The drive link count represents the total number of these components on a complete chain loop. A chain with 72 drive links will have 72 of these engagement points arranged in a continuous circle around the bar and sprocket.
The 20-inch measurement refers to the usable cutting length of the bar, not the total physical length of the bar from tip to mount. This is an important distinction because bars marketed as “20-inch” may have slightly different actual lengths depending on the manufacturer, which can affect the required drive link count. For broader ecosystem context, read through our operational guide on jbl partybox club 120 vs sony srs xv500.
The reason the same 20-inch bar can use different link counts comes down to three variables: the chain pitch, the bar gauge, and the specific bar mount configuration. Pitch determines how far apart the cutting teeth are spaced. Gauge determines how thick the drive links are, which must match the bar groove width. These factors combine to determine how many links fit around a given bar length. For broader ecosystem context, read through our operational guide on jbl partybox club 120 vs sony srs xv500.
Direct Answer: Which Chainsaws Use a 72-Link Chain on a 20-Inch Bar?
Medium-duty gas-powered chainsaws in the 50 to 60cc range frequently use a 72-drive-link chain when equipped with a 20-inch bar. These saws strike a balance between power for moderate cutting tasks and manageable weight for homeowner and light professional use. For troubleshooting and reliability insights, consult our in-depth z890 vs x870e motherboard report.
Pros
- Supports a wide range of chainsaw chains up to .404 pitch
- Includes both chain grinding wheels and a depth-gauge maintenance disc
- Can be mounted on a bench or wall for flexible workspace setup
- Built for frequent sharpening tasks rather than occasional use
Cons
- May be more machine than needed for casual users who sharpen chains only occasionally
- Requires mounting and workshop space, so it is less portable than handheld sharpeners
- Compatibility is limited to chains up to .404 pitch
Overview: The Oregon 520-120 is a professional 120-volt chainsaw chain sharpener designed for frequent, high-volume use. It can be mounted on a bench or wall, making it a practical fit for a garage, workshop, or service area.
Performance and Features: This universal sharpener handles chains up to .404 pitch and is intended to work with many popular chain brands, including Oregon, Stihl, and Husqvarna. Multiple adjustment points support more accurate sharpening, while the built-in light helps improve visibility during detailed grinding work.
Drawbacks and Considerations: Its professional focus means it may be more capable than many casual users need. It also requires a mounting setup and dedicated space, so it is not as portable as simpler chain sharpeners. Chains larger than .404 pitch are not supported.
Verdict: The Oregon 520-120 is best suited to professional users or serious property owners who sharpen chains regularly and want a more controlled, workshop-style solution. If you need a durable sharpener for repeated use and value adjustment precision, this model is a strong fit.
Pros
- Space-saving alternative to a full-size chain sharpener.
- Wide chain compatibility up to .404 inch pitch.
- Includes useful setup and maintenance accessories.
- Bench mounting with included bolts adds stability in a workshop or garage.
Cons
- Best suited to occasional use rather than high-volume sharpening.
- Requires a bench or fixed work surface for installation.
- No customer review details are available in the provided data, so long-term performance feedback is limited.
Overview & Design: The Oregon Professional Compact 120-Volt Bench Chain Grinder is a small bench-mounted chain sharpener built for home workshops and garages. Its compact footprint makes it a practical choice for users who want a dedicated sharpening tool without the size of a full professional machine.
Performance & Key Features: This grinder is designed to sharpen chains up to .404 inch pitch, which covers many common chainsaw chains from brands such as Oregon, Stihl, and Husqvarna. It includes a manual chain clamping vice, one-way motor rotation for added safety, two grinding wheels, a dressing brick, and a profile guide.
Drawbacks & Considerations: The main limitation is that it is aimed at occasional users rather than heavy-duty shop use. It also needs to be bolted to a bench, so it is not a portable sharpener. Since no customer review details were provided, there is limited real-world feedback to judge long-term durability.
Verdict: For homeowners, property owners, and light-duty users who want an affordable and space-saving way to maintain saw chains, this Oregon grinder is a sensible option. It offers the core features needed for basic sharpening while staying compact and straightforward.
Pros
- Electric sharpener with a 230W rating listed in the title
- Designed for saw chain and blade sharpening per title
Cons
- Chain size compatibility is not stated in supplied data
Pros
- High-speed 8400 RPM operation supports efficient sharpening.
- Adjustable angle adds flexibility for different chain types.
- Stable mountable base can improve control during use.
- Lightweight and compact compared with many bench-style sharpeners.
Cons
- Best suited to chains between 1/4" and 3/8" pitch, so it is not a universal solution for every chain size.
- Mountable setup is less portable than a fully handheld sharpener.
- No included accessory list or detailed specs were provided in the source data, so buyers may need to confirm what comes in the box.
Overview: The KonKell Electric Chainsaw Sharpener is a 250W bench-style chain grinder designed to restore cutting edges quickly and with more consistency than manual filing. Its heavy-duty build and compact 1.55 kg design make it a practical option for garages, workshops, and on-site maintenance.
Performance and Features: With an 8400 RPM motor and adjustable grinding angle, this sharpener is built for efficient, repeatable sharpening on chains from 1/4" to 3/8" pitch. The mountable base adds stability, which can help improve accuracy and reduce movement during operation. That makes it a strong fit for users who want a more controlled sharpening process.
Drawbacks and Considerations: The sharpening range is limited to specific chain pitches, so it will not fit every chainsaw chain. Because it is designed to be mounted, it is less convenient for fully portable use than a handheld tool. The provided product data also does not include a full accessory list, so buyers may want to confirm what is included before purchasing.
Verdict: This sharpener makes the most sense for DIY owners, homeowners, and professionals who regularly maintain compatible chains and want a stable, power-driven sharpening solution. If you value speed, adjustability, and a more precise setup, it is a sensible choice.
Models commonly associated with this configuration include several popular options from major manufacturers. The Stihl medium-frame saws in the Farm Boss and Rancher-style classes often use this combination when equipped with the standard 3/8-inch pitch, 0.050-inch gauge chain. Similar configurations appear across Husqvarna’s homeowner and farm-oriented models in the 50 to 60cc class. Echo’s medium-duty offerings in comparable displacement ranges also frequently use this setup.
The typical chain specification for these saws is a 3/8-inch pitch with 0.050-inch gauge and 72 drive links. This combination provides good cutting performance while maintaining chain speed and control suitable for the power output of mid-range saws. For troubleshooting and reliability insights, consult our in-depth z890 vs x870e motherboard report.
However, you should note that the same bar length from different manufacturers—or even different bars from the same manufacturer—may require different link counts. Some 20-inch bars using 0.325-inch pitch chains may also use 72 drive links, while the same bar length with 3/8-inch pitch might require 70 links depending on the specific mount and groove configuration. Always verify your saw’s exact requirements rather than assuming based on bar length alone.
Key Factors to Check: Pitch, Gauge, Drive Links, and Bar Mount
Understanding these four specifications will prevent you from buying the wrong chain. Each factor must match your bar and saw requirements. Readers comparing setup options can review our technical analysis on marshall stanmore iii vs harman kardon onyx studio 8.
Chain Pitch
Chain pitch refers to the distance between three consecutive rivets divided by two, measured in inches. The two most common pitches for mid-range saws are 0.325 inches and 3/8 inches. The 3/8-inch pitch is more prevalent on medium-duty saws because it offers a good balance of cutting speed and chain strength. The 0.325-inch pitch is slightly narrower and is often found on lighter-duty saws or specific bar configurations.
A 3/8-inch pitch chain will not physically fit a bar and sprocket designed for 0.325-inch pitch, and vice versa. The cutting teeth and rakers are also spaced differently, so using the wrong pitch would result in poor cutting performance or damage. For complementary field maintenance guidelines, examine our breakdown of dyson v8 cyclone vs bissell featherweight stick.
Bar Gauge
Bar gauge describes the thickness of the drive links, which must match the width of the groove in your guide bar. Common gauges are 0.043 inches, 0.050 inches, and 0.058 inches. Most medium-duty saws using a 20-inch bar with 3/8-inch pitch utilize 0.050-inch gauge.
If you install a chain with the wrong gauge, it will either be too loose (causing safety hazards and poor performance) or too tight (causing excessive wear and potential damage). The chain must fit snugly in the bar groove while still being able to rotate freely. To evaluate matched hardware tolerances, consult our detailed overview of bissell crosswave hydrosteam vs shark stainforce.
Drive Link Count
The drive link count must exactly match what your bar requires. For a 20-inch bar on a medium-duty saw, common counts include 70, 72, and occasionally other numbers depending on the specific bar and pitch combination. The link count is determined by the bar length, pitch, and gauge working together.
A chain with too few links will not reach around the bar. A chain with too many links will bunch up and potentially damage the bar or cause the chain to skip off the sprocket.
Bar Mount
The bar mount refers to how the bar attaches to the saw’s sprocket nose or clutch. Different manufacturers use different mounting systems, and some saws within the same brand use different mounts for different bar lengths. The mount affects how the chain sits in the bar and how the drive links engage with the sprocket.
Using a chain designed for a different mount type—even if the pitch, gauge, and link count appear correct—can result in poor chain retention or premature wear. Always confirm that your replacement chain is designed for your specific bar mount configuration.
Step-by-Step: How to Verify Compatibility Before Buying
Following these steps will help you confirm the exact chain specifications for your chainsaw before making a purchase.
Step 1: Locate Your Current Chain’s Specifications
Look at the side of your cutting chain where the manufacturer stamps the specifications. You will typically see a three-part code: pitch, gauge, and drive link count. For example, you might see “3/8 P .050 72” indicating a 3/8-inch pitch, 0.050-inch gauge, 72-drive-link chain.
If the chain has been heavily used or filed, the stamps may be worn. In this case, move to Step 2.
Step 2: Check Your Owner’s Manual
Your chainsaw’s owner’s manual lists the recommended chain specifications for each bar length the saw can accept. This information is specific to your model and accounts for the exact bar mount and sprocket configuration. The manual will typically list the chain size in the format “pitch-gauge-drive links” or similar.
If you do not have the manual, most manufacturers provide PDF versions on their websites if you search by model number.
Step 3: Measure Your Bar
Measure the cutting length of your bar from the tip to the point where it emerges from the saw body. This is the 20-inch or other length measurement. Do not measure the total physical length of the bar, as this will give you an incorrect number.
Compare this length to what your manual or current chain specifications claim. If they match, you have confirmation. If they differ significantly, you may have the wrong bar length or need to verify your measurements.
Step 4: Verify Pitch and Gauge
If you need to determine pitch and gauge without stamped information, you can measure them directly. For pitch, measure the distance between the centers of three consecutive rivets and divide by two. For gauge, measure the thickness of a drive link with calipers.
However, visual comparison with a known chain of the correct specification is often easier and more reliable for most users.
Step 5: Confirm the Link Count
Count the drive links on your current chain by marking one link with a piece of tape, then counting every drive link as the chain passes through your hands until you return to the tape. This number—72 in your case—must be matched exactly.
Common Compatibility Mistakes to Avoid
Understanding these frequent errors will help you avoid wasting money on the wrong chain or potentially damaging your equipment.
Mistake 1: Assuming Bar Length Determines Everything
Many buyers assume that any 72-link chain will fit any 20-inch bar. This is incorrect because pitch, gauge, and mount also affect compatibility. A 72-link chain designed for a 0.325-inch pitch bar will not fit a 3/8-inch pitch bar of the same length, even though the link count matches.
Mistake 2: Ignoring the Gauge
The bar gauge must match exactly. A 0.050-inch gauge chain on a 0.058-inch gauge bar will be dangerously loose. Conversely, forcing a 0.058-inch chain into a narrower groove will cause binding and excessive wear on the bar rails.
Mistake 3: Mixing Pitch Types
Some users try to use a 0.325-inch pitch chain on a 3/8-inch pitch system because the chains look similar. The different tooth spacing means the chain will not engage properly with the sprocket and guide bar, creating a serious safety hazard and poor cutting performance.
Mistake 4: Overlooking Bar Mount Differences
The same manufacturer may offer multiple bar mount options for the same bar length. An interchangeable bar mount may use a different link count than a mounted bar from the same manufacturer, even with identical pitch and gauge specifications.
Mistake 5: Buying Based on Other People’s Recommendations
While knowing that certain saw models commonly use 72 links on a 20-inch bar is helpful, your specific saw and bar combination may differ. Always verify against your owner’s manual or the physical specifications of your current chain rather than assuming a recommendation from a friend or online forum applies to your exact situation.
Common Questions on 72 Link 20 Inch Bar Answered
Can a 72-link chain fit all 20-inch bars? No. The link count must match the pitch, gauge, and mount requirements of your specific bar. A 72-link chain for a 3/8-inch pitch, 0.050-inch gauge bar will not fit a bar requiring a different configuration.
What happens if I use the wrong pitch chain? Using a chain with the wrong pitch will prevent proper engagement with the sprocket and guide bar. This can cause the chain to skip, bind, or come off the bar entirely, creating a serious safety hazard.
Why does my 20-inch bar use 70 links instead of 72? Different bar mounts and gauge specifications affect how many links fit around a given bar length. A 20-inch bar with a narrower gauge or different mount may require fewer links to achieve the same cutting length.
Is it safe to use a chain with slightly different specifications? No. Even small mismatches in gauge or pitch can cause safety issues and equipment damage. All specifications must match exactly for safe and effective operation.
Where can I find my exact chain specifications? Check your owner’s manual or look for the stamped specifications on the side of your current chain. If these are unavailable, contact the saw manufacturer with your model number.
Summary
Chainsaws that commonly take a 72-link chain on a 20-inch bar are typically medium-duty models in the 50 to 60cc class, often from Stihl, Husqvarna, and Echo. These saws typically use 3/8-inch pitch chains with 0.050-inch gauge, but the exact link count depends on the specific bar mount and configuration.
Before purchasing a replacement chain, verify the pitch, gauge, drive link count, and bar mount match your specific saw and bar combination. Check your owner’s manual or the specifications stamped on your current chain. Never assume that a chain fitting a friend’s saw with similar specifications will fit yours—small differences in any of these four factors can make a chain incompatible.
When in doubt, consult your saw’s owner’s manual or contact the manufacturer directly with your model number. Taking a few minutes to verify specifications can prevent injury, equipment damage, and the cost of returning an incompatible chain.
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Mechanical safety standards, operational tolerances, and protective gear guidelines align with benchmark specifications established by the American National Standards Institute (ANSI).
