Makita UC3591A Chain (Size & Fit Guide)
For the common 35 cm (14 in) bar on the corded Makita UC3591A, the usual replacement chain is 3/8 in low-profile pitch, 1.3 mm (.050 in) gauge, and 52 drive links. Check the bar stamp or manual before buying: the fitted bar’s specifications override this common setup. Match all three dimensions, then tension and oil the chain before cutting.
A chain can look close and still be the wrong fit. Pitch, gauge, and drive-link count each matter; bar length alone does not identify a replacement. I check the bar markings first, then compare the chain package and the saw’s manual before fitting anything.
The UC3591A is corded electric, so it needs no fuel mixture or carburetor adjustment. Its rated input is 2,000 W and its specified chain speed is 14.5 m/s. Those figures do not change the chain-fit rule: use a chain that matches the fitted bar and sprocket.
UC3591A chain fitment, bar matching, and safety setup
This section identifies the common UC3591A chain size and explains how to verify it on your saw. The usual 35 cm bar setup takes a 3/8 in low-profile chain with a 1.3 mm (.050 in) gauge and 52 drive links. Treat those figures as a starting point, not a substitute for checking your bar.
The common replacement-chain dimensions
The chain’s pitch is the spacing used to match it to the drive sprocket and bar nose. Gauge is the thickness of the drive links that sit in the bar groove. Drive-link count is the number of links that run inside that groove.
| What to match | Common 35 cm / 14 in setup | What to check |
|---|---|---|
| Pitch | 3/8 in low profile | Bar stamp, manual, replacement chain label |
| Gauge | 1.3 mm (.050 in) | Bar stamp or manual |
| Drive links | 52 | Count the old chain or check the bar/manual |
| Chain family | Commonly Oregon 91-series | Confirm the exact chain maker’s specifications |
Oregon 91-series chains are commonly used for this size combination, but the series name alone is not enough to confirm fit. Check that the exact chain has the required pitch, gauge, and link count. A chain with 50 or 56 drive links will not become correct just because its package lists a 35 cm bar.
I have seen owners focus on the bar length and overlook the stamp inside the bar cover area. That can lead to buying a chain that appears right on the shelf but will not seat correctly. If the fitted bar is not the common 35 cm setup, use its markings and the correct manual to identify the chain.
How to verify your fitted bar
A bar stamp is the quickest dependable check when it is readable. Remove the plug from the power supply before taking off the sprocket cover or handling the chain. Clean away packed sawdust, then look for stamped or printed details on the bar.
If the stamp is missing or worn, consult the saw manual and the bar maker’s part information. You can also count the drive links on the removed chain, but that only confirms the link count of that chain; it does not prove the chain is correct. Compare all three dimensions with the bar and sprocket requirements.
Safe installation and pre-start checks
Start with the saw unplugged. Wear a helmet with eye and face protection, hearing protection, chainsaw-rated leg protection, gloves, and boots. Inspect the cord and plug, switch, chain catcher, bar, fasteners, and chain brake if fitted. Clear the work area, note overhead hazards, and keep bystanders away.
To fit the chain:
- Remove the sprocket cover as directed in the manual, and release the tension adjuster if needed.
- Place the chain around the sprocket and into the bar groove. Check the direction: the cutters on the top run of the bar must face forward, toward the bar nose.
- Refit the cover and adjust tension according to the manual. The chain must sit in the groove and should move by hand with a gloved hand, without hanging loose.
- Tighten the cover fasteners as instructed, then recheck tension. A chain can feel different after the cover is secured.
Do not force a chain onto the bar or use the adjuster to compensate for a wrong link count. If it will not seat and adjust correctly, stop and recheck the part numbers and specifications. Fill the automatic oil reservoir with dedicated chainsaw bar-and-chain oil; its capacity is 200 mL. Do not use engine oil or waste oil.
Before cutting, check oil delivery using the method in the manual. Use an RCD/GFCI-protected supply and an outdoor-rated extension cord. Route the cord behind you and away from the cutting path.
Field cutting practice and landscaping applications
The UC3591A is a corded saw, so safe work depends on both a suitable chain and careful cord control. Keep the chain clear of the work as you start, hold the saw with two hands, and avoid forcing a chain that slows. Keep the bar nose away from wood to reduce kickback risk.
A sharp, correctly fitted chain should cut without being pushed hard. If it produces fine dust, needs excess pressure, or burns the wood, stop and inspect it. Those signs can point to dull cutters, poor lubrication, incorrect tension, or a chain that is damaged. Do not keep cutting to see if the problem clears.
Kickback can occur if the guide-bar nose contacts wood, or if the chain is pinched and stops suddenly. The saw may rotate rapidly toward the operator. Keep the upper bar tip clear, maintain a firm two-handed grip, cut below shoulder height, and never reach across a moving chain.
Here are two common fitment situations I use to explain the checks. They are examples, not a claim that every saw has the same bar fitted.
| Situation | What to do | Why it matters |
|---|---|---|
| A replacement chain is marked 3/8 in low profile, .050 in, 52 links; the bar stamp agrees | Confirm the sprocket match, then install and tension as directed | All three chain dimensions match the common configuration |
| A 35 cm bar is fitted, but its stamp calls for a different link count | Follow the bar stamp and manual, not the common 52-link figure | Bar length alone does not determine drive-link count |
| A chain fits the groove but will not tension correctly | Unplug, remove the cover, and recheck pitch, gauge, and link count | A near match is not a safe fit |
| The chain cuts slowly and leaves fine dust | Stop, unplug, inspect cutters, tension, and oil delivery | Continuing to force a dull or poorly lubricated chain can add strain |
For landscaping, use stable footing and keep the cutting area clear. Do not cut with the upper bar tip, and do not force the saw if the chain slows. Tree felling or complex cuts involving tension and compression call for trained operators and suitable procedures. A corded saw is not a replacement for the equipment and skill required for professional felling.
Chain tension, sharpening, and bar/oiler maintenance
Tension keeps the drive links seated in the bar groove while allowing the chain to move. Check it with the saw unplugged, and follow the manual’s adjustment steps. A loose chain can derail; one set too tight can add wear and make the saw difficult to move by hand.
Check tension before work and again during use as directed by the manual, especially after fitting a chain. Let the chain cool before making a final adjustment. Never tension, clean, or adjust the saw while it is plugged in.
For the common Oregon 91-series chain, a 4.0 mm (5/32 in) round file and a 30-degree top-plate filing angle are common sharpening specifications. Confirm the markings and instructions for your exact chain before filing; chain types can differ. Keep the file level and use consistent strokes. If cutters are damaged or uneven, have the chain assessed rather than trying to correct it by eye.
Depth gauges control how much wood a cutter takes. Their setting must follow the chain maker’s specification. For Oregon 91-series chain, the commonly specified depth-gauge setting is .025 in (0.65 mm). Use a depth-gauge tool, not guesswork, and do not lower the gauges beyond the chain maker’s limits.
After use, unplug the saw before cleaning. Once the chain and bar have cooled, clear debris from the sprocket cover, bar groove, and oil outlet. Check for damaged cutters, uneven wear, burrs on the bar rails, and signs of poor oil flow. A blocked oil outlet can leave the chain running without enough lubrication.
Unplugged storage and seasonal care
Store the UC3591A unplugged, with the chain covered and the saw kept dry. Before putting it away, clean the bar and cover area, inspect the chain and cord, and confirm the oil reservoir is not leaking. A quick check before the next job can catch a damaged or incorrect chain before it reaches the wood.
I make the fit check part of storage, too. If the old chain is removed, note its link count and keep the package or part details with the saw. Do not rely on memory or on bar length when ordering a replacement later.
A quick pre-cut checklist
- Confirm the bar’s pitch, gauge, and required drive-link count.
- Make sure the chain is undamaged, correctly oriented, seated, and tensioned.
- Fill the 200 mL automatic oil reservoir with bar-and-chain oil and check delivery.
- Inspect the cord and plug; use an outdoor-rated cord and RCD/GFCI protection.
- Keep the cord behind the operator and clear of the cut.
- Stop and unplug before adjustment, cleaning, or inspection.
Bottom line: the usual chain for a 35 cm UC3591A setup is 3/8 in low profile, 1.3 mm (.050 in), and 52 drive links. Verify the fitted bar’s markings before purchase, then match every dimension.
Frequently asked questions
What chain size does the Makita UC3591A usually use?
The common 35 cm (14 in) setup uses 3/8 in low-profile pitch, 1.3 mm (.050 in) gauge, and 52 drive links. Check the fitted bar stamp or manual before ordering.
Is the UC3591A chain always 52 drive links?
No. Fifty-two links is the common count for the standard 35 cm setup. If your fitted bar specifies another count, follow the bar and manual.
Can I choose a replacement chain by bar length alone?
No. Match pitch, gauge, and drive-link count. Bar length alone does not confirm that a chain will fit the groove and sprocket.
Is Oregon 91-series chain suitable?
It is a common chain family for the standard size combination. Check the exact chain’s pitch, gauge, and link count against your bar before buying.
What file size is used for a common 91-series chain?
A 4.0 mm (5/32 in) round file is common for Oregon 91-series chain. Confirm the sharpening instructions for the exact chain you own.
What sharpening angle should I use?
A 30-degree top-plate angle is common for Oregon 91-series chain. Follow the chain maker’s markings and instructions if they differ.
Does the UC3591A need a fuel mix?
No. It is a corded electric saw, so it uses no gasoline, two-stroke oil mixture, or carburetor adjustment.
What oil goes in the reservoir?
Use dedicated chainsaw bar-and-chain oil. The automatic oil reservoir holds 200 mL. Do not substitute engine oil or waste oil.
Can I adjust the chain while the saw is plugged in?
No. Unplug the saw before fitting, tensioning, cleaning, or adjusting the chain. A switched-off saw can still start if power remains connected.
Why does the chain fit but fail to tension correctly?
Recheck pitch, gauge, and drive-link count, and confirm the chain is seated around the sprocket and in the bar groove. Do not force the adjuster to make a mismatched chain fit.
(This article was written by one of our staff writers, David Hensley. Visit our Meet the Team page.)
