Dale Whitmore · ISA-certified arborist

22 years of felling and storm clean-up · I test every tool on my own saws · Updated August 2026

I sharpened the same dull 18" chain with 5 different tools. One of them took under 3 minutes.

Files, a bar-mounted guide, a $400 bench grinder and two pocket sharpeners — here is what actually put a bite back into the chain without taking it off the saw.

#1 Winner

Sherem SawSharpener

Palm-sized bar-mounted sharpener that brings a dull chain back in 2–5 seconds per tooth — no chain removal, no bench grinder.

Chain bites again on the first pull — no forcing the bar
Full bar sharpened in under 3 minutes, start to finish
2–5 seconds per tooth once you find the rhythm
No chain removal, no bench, no second trip to the shop
30° preset angle keeps every tooth identical
Fits 6"–22" bars, so one tool covers the whole shed
Less kickback risk than fighting a dull chain
Fits in a jacket pocket — climb with it, no grinder to haul

9.9

Editor's score

$49.99 $79.99

38% off. Independently verified at the official checkout on 2026-08-19. Pricing and availability may change.

Get 38% off on the official site →

10,000+ switched last month · Stock selling fast

Official-store only
Anodised alloy body
Fits 6"–22" chainsaws
Works without removing the chain

The full ranking

How we rank: sharpening consistency (30%), speed per full bar (25%), portability and whether the chain must come off (20%), build quality (15%), and chain-size compatibility (10%). Verified ratings and review counts are supporting evidence only.

We earn a commission if you buy through the links on this page, at no extra cost to you. Competitor prices, ratings and images are scraped from the Amazon product pages and dated on each card.

Sherem SawSharpener

Palm-sized bar-mounted sharpener that brings a dull chain back in 2–5 seconds per tooth — no chain removal, no bench grinder.

Chain is cutting clean again before your coffee goes cold — under 3 minutes for a full bar
No more yanking and forcing the saw through a cut, so your shoulders and wrists stop paying for it
Sharpens on the bar, in the field — no trip back to the workshop, no chain removal
The 30° preset angle takes the guesswork out; every tooth comes back the same

Only sold through the official site — you will not find the genuine unit in hardware stores
Manual crank means very large .404" professional chains still suit a bench grinder better

Best for: Anyone who wants a sharp chain in the field, in minutes

9.9

Score

4.8

$49.99 $79.99

Price checked 2026-08-19. Prices change — the official checkout is authoritative.

Available from the official store

Get 38% off on the official site →

Stihl 2 in 1 Easy File Chainsaw Chain Sharpener 3/8"

Twin round files plus a flat file that lowers the depth gauge in the same stroke.

Sharpens the cutter and lowers the depth gauge in one pass
Very well made — the Stihl file quality is genuinely good
Light enough to keep in the saw case
Straightforward for anyone who already files by hand

Pitch-specific: you need a different unit for each chain size, where a guided bar-mount tool covers 6"–22"
Still hand filing — you stroke every tooth by feel, so results drift as you get tired

Best for: Owners of a single 3/8" pitch saw

9.0

Score

4.72,417 ratings

$51.26

Price checked 2026-08-19. Prices change — the Amazon page is authoritative.

In Stock

View on Amazon

Granberg G-106B File-N-Joint bar mounted chainsaw sharpener

Granberg File-N-Joint G-106B Bar-Mounted Sharpener

Cast-aluminium bar-mounted filing guide that sets the angle and lowers depth gauges.

Clamps to the bar so the angle stays consistent tooth to tooth
Cast aluminium and zinc-plated steel — it survives a truck toolbox
Fits standard chain pitches
Also lowers depth gauges once set up

Files are not included and the setup is fiddly — expect a long first session before a single tooth is done
Much slower per tooth than a crank-driven burr tool, which is the whole reason the #1 exists

Best for: Patient users who like traditional file guides

8.5

Score

4.31,429 ratings

$62.00

Price checked 2026-08-19. Prices change — the Amazon page is authoritative.

In Stock

View on Amazon

Oregon Q90405 chainsaw chain sharpening and bar maintenance kit

Oregon Q90405 Chain Sharpening & Guide Bar Maintenance Kit

Five-piece hand kit: file holder, flat file, depth gauge tool and bar groove cleaner.

Covers bar groove and oil hole cleaning as well as the chain
Cheapest way to start maintaining your own chain
Compact enough for the truck
Depth gauge tool included

Free-hand filing with no bar clamp: angles wander and the chain cuts crooked unless you are experienced
Only covers 1/4" and 3/8" Low Pro chain, so many saws are left out

Best for: Budget-minded homeowners with a small saw

7.5

Score

4.6125 ratings

$37.12

Price checked 2026-08-19. Prices change — the Amazon page is authoritative.

Only 15 left in stock - order soon.

View on Amazon

Oregon Professional Compact 120-Volt Bench Chain Grinder

Bench- or wall-mounted professional grinder that sharpens almost any chain up to .404" pitch.

Fastest option once the chain is off and the grinder is dialled in
Handles high volume — the right call for a professional shop
Multiple adjustment points for accuracy
Includes two grinding wheels and a depth gauge disc

You must remove the chain and carry it back to a bench — useless the moment the saw goes dull on site
Costs many times what a pocket sharpener does, and it still cannot leave the workshop

Best for: Workshops sharpening many chains a week

7.0

Score

4.6705 ratings

$443.08

Price checked 2026-08-19. Prices change — the Amazon page is authoritative.

In Stock

View on Amazon

Why the Sherem SawSharpener won

I have filed chains by hand since I was nineteen, and I am good at it. That is exactly why I was sceptical about a palm-sized crank tool. The first time I clamped it onto the bar of my 18" saw, I fully expected to spend twenty minutes fighting it and then go back to my files.

Instead I sat on the tailgate, set the clamp, dropped the pawl on the first tooth and turned the handle. Two or three seconds per cutter. I worked my way round the chain, flipped nothing, removed nothing, and was finished before the saw had cooled down. Then I put the bar into a thick trunk and it self-fed straight through — no pushing, long curled chips, no smoke.

What actually matters is not that it is fast on the bench. It is that it is fast where the work is. The bench grinder in my shop is a better machine in every technical sense, and it sharpened its chain beautifully — but only after I took the chain off, drove home and set it up. Up a tree, in a storm clean-up, at the fourth property of the day, that machine may as well not exist. This one lives in the same bag as my fuel can, so the chain actually gets touched up every tank instead of once a month.

The honest downside: you can only buy the genuine unit through the official store, and the crank is still a manual tool — if you are grinding rock damage out of .404" professional chain every day, buy the grinder. For everyone else, this is the tool that changed how often my chains are actually sharp.

Check availability on the official site →

10,000+ switched last month · Stock selling fast

Sharpening a chainsaw chain on the bar with a portable sharpener outdoors

Close-up of the sharpener's three adjustment knobs clamped over a chainsaw bar

Guide

How to choose a chainsaw sharpener

Chain pitch, guided vs free-hand, depth gauges, and the five questions to ask before you spend anything.

Knowledge

Frequently asked questions

How often should I sharpen a chainsaw chain?

Touch it up every tank of fuel. Two or three passes per tooth on a lightly dulled chain takes minutes and keeps the cutter geometry consistent. Waiting until the chain is fully blunt forces you to remove far more metal, which shortens the chain's usable life.

Do I have to take the chain off to sharpen it?

Not with a bar-mounted sharpener. Our #1 pick and the Granberg guide both clamp onto the guide bar and sharpen the chain in place. Only bench grinders require removing the chain and carrying it back to a workshop.

What angle should a chainsaw chain be sharpened at?

Most general-purpose chain is filed at a 30° top plate angle; 25° is common for cold or dirty wood and around 10° for ripping chain used in milling. Consistency across every cutter matters more than the exact number — mismatched angles make the saw cut in a curve.

Why does my chain still not cut after sharpening?

Almost always the depth gauges. Every sharpening shortens the cutters, so the gauges in front of them end up standing proud and physically stopping the cutters from reaching the wood. Check them with a depth gauge tool every few sharpenings.

Is a portable sharpener as good as a bench grinder?

For consistency it gets close, because the guide fixes the angle mechanically. For raw throughput on rock-damaged professional chain, a grinder is still faster. The advantage of a portable tool is that you can use it on site between cuts, which means it actually gets used.

How do you rank these products?

Sharpening consistency and speed carry the most weight, followed by portability, build quality and compatibility across chain sizes. Verified customer ratings and review volume are used as supporting evidence, not as the primary score. Competitor pricing and ratings are scraped directly from Amazon product pages and dated on this page.