Stihl Chainsaw Chains (Types & Sizing Guide)
Choose a STIHL chain by matching three details: pitch, gauge, and drive-link count. Read them from the bar stamp or saw manual, then confirm the chain type and approved bar fit the exact saw model. Bar length alone is not enough. Correct fit, sharp cutters, proper tension, and safe operation matter as much as the brand name.
A chain can look right and still be wrong for your saw. I treat the bar stamp and the model manual as the deciding evidence, not a product photo or a seller’s “fits most” claim. That simple check helps prevent wasted purchases and reduces the risk of poor fit or damage.
Equipment setup, chain sizing, and safety preparation
A STIHL chain must match the bar and saw in pitch, gauge, and drive-link count. These measurements work together; none can be safely guessed from bar length or appearance. Before ordering, record the markings on your guide bar and check the manual for the exact saw model and approved setup.
How to identify the three chain measurements
Pitch is the spacing between chain links, stated as a fraction of an inch. Gauge is the thickness of the drive link, the part that sits in the bar groove. Drive-link count is the number of links that travel around the bar and sprocket.
Look for these details stamped on the bar, often near its mounting end. If the stamp is hard to read, use the model’s manual or ask a STIHL dealer to identify the bar. Do not count on pitch and gauge alone to determine chain length.
| Measurement | What it means | Where to verify |
|---|---|---|
| Pitch | Spacing that must match the chain, bar, and drive sprocket | Bar stamp and saw manual |
| Gauge | Drive-link thickness that must fit the bar groove | Bar stamp and manual |
| Drive links | Total links needed for that exact bar setup | Bar stamp, manual, or chain listing |
A chain described as 3/8-inch low-profile (3/8 P), .050-inch gauge is a valid example only if the bar and saw call for those specifications. It is not a universal STIHL fit. Even two bars with the same nominal length may call for different drive-link counts.
Check the whole cutting setup, not just the chain
The chain must work with the guide bar and drive sprocket. The saw manual sets out approved bar lengths and configurations for that model. There is no universal rule that lets you choose a bar safely from engine size alone. Use the approved range and consider the intended work.
Hardwood does not require a different chain size by itself. It does place more load on the cutting system. Keep the chain sharp, avoid forcing the saw through a cut, and use the setup specified for the saw.
STIHL chain types and what the labels mean
STIHL chain names describe chain families and cutting features, but a family name does not replace sizing checks. Names such as Picco, Rapid, Micro, Super, and Duro appear on STIHL chains and product information. Availability and exact versions can vary by market and chain generation.
Common chain families and cutter styles
Picco chains are generally associated with smaller-pitch chain systems, including low-profile applications where specified. Rapid chains cover other STIHL chain and bar systems. Micro and Super refer to different cutter designs; Duro versions use carbide-tipped cutters in applicable products. Check the specific chain’s product details rather than assuming every family fits every saw.
A cutter’s shape also matters. Full-chisel cutters have a square corner, while semi-chisel cutters have a more rounded profile. The right choice depends on the chain offered for the saw, the work, and the user’s sharpening needs. Neither cutter style changes the need to match pitch, gauge, and drive links.
| Chain feature | What to check | Useful buying question |
|---|---|---|
| Picco or Rapid family | Exact pitch and approved saw/bar fit | Is this chain listed for my bar and model? |
| Micro or Super cutter style | Chain’s exact product designation | Can I maintain this cutter profile correctly? |
| Duro or carbide-tipped type | Manufacturer’s sharpening and service instructions | Do I have the right tools or dealer support? |
| Low-kickback design, where identified | Product details and saw manual | Is this the chain specified for my use? |
A “pro” label or a familiar family name is not proof of compatibility. I recommend comparing the chain’s full designation with the bar stamp and manual before paying. If a listing gives only bar length, ask for the pitch, gauge, and link count.
How to size a replacement STIHL chain
Sizing means confirming the chain’s three dimensions against the bar and saw. Start with the bar stamp, then confirm the saw’s approved setup in its manual. If the markings conflict, stop and have a dealer identify the bar and sprocket before ordering.
A practical sizing sequence
- Find the saw model. Read the model label on the saw and locate the matching manual. Do not rely on a seller’s model list if it omits the bar or chain version.
- Read the bar markings. Record pitch, gauge, and drive-link count. If a marking is worn or missing, use the exact bar part number or ask a dealer to confirm it.
- Check the manual. Confirm the bar and chain combination is approved for the saw. Also check whether the sprocket must match the chain pitch.
- Compare the full chain listing. Check all three measurements and the chain type. A listing that says “fits a 16-inch bar” is incomplete.
- Inspect before fitting. Do not install a chain with damaged links, cracked cutters, or other visible defects.
Sizing examples: what to do in common cases
These examples show the verification process, not universal fit rules. Bar sizes and chain specifications vary by exact saw and bar.
| Situation | Correct next step |
|---|---|
| Bar stamp gives pitch, gauge, and link count | Match all three to the chain listing, then check the manual |
| Pitch and gauge are clear, but link count is not | Find the exact bar specification; do not infer count from length |
| Bar is a different length from the original | Confirm the new bar is approved for the saw and verify all chain measurements |
| Online listing gives only “fits STIHL” | Ask for the chain’s pitch, gauge, drive links, and compatible bar |
| Chain feels too tight or loose after fitting | Stop; check fit and tension using the manual before starting |
For example, a chain marked 3/8 P and .050 gauge is not ready to order until you also confirm the drive-link count and approved saw/bar combination. That final number is often where a seemingly correct purchase fails.
Fitting, starting, and safe cutting
Safe operation begins before the first cut. Follow the saw manual, the applicable ANSI Z133 work practices, and OSHA 29 CFR 1910.266 where they apply to the work. Do not use a saw beyond its rated or manufacturer-approved configuration.
Before starting
Wear chainsaw-rated leg protection, a helmet with eye and face protection, hearing protection, gloves, and protective boots. Check the chain, bar, controls, chain brake, throttle lockout, and chain catcher. Confirm chain tension and lubrication according to the manual.
Assess the work area for overhead hazards, lean, footing, bystanders, and escape routes. Use a site-specific plan for tree work. Felling or complex removals require suitable training and work controls.
Start the saw on stable ground and follow its cold- or warm-start steps, with the chain brake engaged as directed. Check that the chain does not move at idle. Verify lubrication using the manual’s procedure. If the chain moves at idle or lubrication is not working, stop and correct the fault before cutting.
While cutting
Hold the saw with both hands and keep the bar nose clear of objects. Rotational kickback can occur when the upper quadrant of the bar nose contacts wood or another object, throwing the saw back toward the operator. A chain brake is not a substitute for avoiding nose contact, keeping a firm grip, and using sound cutting technique.
Use a stable stance and planned cut sequence. Do not cut above shoulder height. If the chain is dull, damaged, or incorrectly tensioned, stop rather than forcing it through wood.
Chain sharpening, tensioning, and saw maintenance
A sharp, correctly tensioned chain cuts more effectively and helps you spot problems early. Follow the instructions for the exact chain and saw. Cutter geometry, depth-gauge clearance, chain tension, lubrication, and service settings are not universal across STIHL models.
Sharpen and tension to the chain instructions
Use the file size, filing angles, and depth-gauge tool specified for that chain. Depth gauges, also called rakers, control how much wood each cutter takes. Their correct height depends on the chain model. Do not apply a generic setting such as .025 inch unless the applicable STIHL chain instructions call for it.
Check tension with the saw shut down and follow the manual’s method. A chain that is too loose may come off; one that is too tight can add wear and strain. Recheck after use and whenever cutting performance or fit changes. Stop if you find damaged cutters, links, or bar parts.
Keep the bar groove and oil passages clean. Before adjustment or cleaning, shut the saw down and let hot parts cool. Clean debris from the bar groove, sprocket cover, and air-intake areas, then inspect the chain and bar before the next start.
Shutdown, storage, and fuel care
Shutdown and storage steps help protect the chain and saw between jobs. Use the manual for the exact controls and service steps. Fuel instructions apply to the saw, not the chain, but they matter when storing or preparing a compatible two-stroke model.
After cutting, engage the brake as appropriate and shut down before cleaning or adjustment. Let the saw cool. Clean away chips and debris, inspect the chain for damage, and check tension before storage or the next start.
For STIHL two-stroke saws whose manuals specify the standard STIHL mixture, use a 50:1 gasoline-to-two-cycle-oil ratio by volume. That equals 5 litres of gasoline to 100 millilitres of oil. Confirm the specific model manual; never put straight gasoline in a two-stroke saw. Idle speed, maximum speed, oil delivery, and fastener torque also vary by model, so do not tune or tighten by guesswork.
Frequently asked questions
These answers cover common chain-buying and maintenance questions. For a specific saw, the manual and bar markings take priority over general guidance. If the bar stamp is missing or the setup has been changed, confirm the part numbers with a STIHL dealer before fitting a chain.
How do I find the right STIHL chainsaw chain?
Match the pitch, gauge, and drive-link count shown on the bar or specified for its part number. Then confirm the combination is approved for your saw model.
Can I choose a chain by bar length alone?
No. Bar length does not determine pitch, gauge, or drive-link count. Check all three measurements.
Does a longer bar need a longer chain?
It usually calls for a chain made for that exact bar, but do not infer its link count. Confirm the bar’s specification and the saw’s approved setup.
What does 3/8 P mean?
It means 3/8-inch low-profile pitch. It is compatible only when the bar, sprocket, and saw specify that chain system.
Can I use a .050-gauge chain on any STIHL bar?
No. The chain gauge must match the bar groove, and the chain must also match pitch and drive-link count.
Does hardwood need a different chain size?
Not by itself. Hardwood increases cutting load, so use the approved setup, keep the chain sharp, and do not force the saw.
Can I install a chain with the same pitch but a different link count?
No. Drive-link count must match the exact bar. Pitch and gauge alone do not establish chain length.
What is the correct depth-gauge setting?
Use the instructions and tool for the exact chain. Do not assume a generic clearance applies to every STIHL chain.
Why does my chain move at idle?
Stop the saw and correct the fault before cutting. Follow the manual or have a qualified dealer inspect the saw; do not keep operating it.
What should I do if the bar markings are unreadable?
Use the bar part number or ask a STIHL dealer to identify it. Do not guess from appearance or nominal bar length.
Can I use any low-kickback chain that fits?
Confirm the chain is approved for the exact saw and bar, and follow the manual and applicable work rules. Physical fit alone is not enough.
Which check matters most before ordering?
Verify all three dimensions: pitch, gauge, and drive-link count. Then confirm the chain and bar are approved for the saw.
(This article was written by one of our staff writers, Elliott Fowler. Visit our Meet the Team page.)
