Australian Engineer Shows a Faster Way to Sharpen Chainsaw Chains
By Craig Merritt
May 11, 2026
Tasmania, Australia - What originally started as a field frustration on a professional logging site is now turning into one of the most discussed chainsaw tools in Australia.
The idea is simple: a compact sharpener that brings any dull chainsaw chain back to factory-sharp in under three minutes — without removing the chain, without a grinder, and without any prior sharpening experience.
That's exactly what David Werner (52), a forestry equipment engineer from Tasmania, asked himself after years of watching professional logging crews waste hours and money on sharpening methods that didn't last.
"Every crew I worked with had the same problem," David explains. "The chains would go dull after a few hours of hard cutting. They'd stop, file by hand — usually at the wrong angle — and within minutes the chain was dragging again. Or they'd send it out and wait days to get it back."
With over 24 years of experience developing tools for professional forestry operations, David couldn't let the problem go.
"The concept isn't complicated," Werner says. "Every chainsaw chain already has the correct geometry built into it from the factory. The problem is that hand filing and cheap grinders can't reproduce that angle consistently across every tooth. So every sharpening session makes the chain slightly worse than the one before."
After more than a year of prototyping with professional logging crews in the field, he finally built a working version: a compact clamp-on sharpener that locks the correct angle automatically and guides every tooth through an identical sharpening pass.
The outcome?
Factory-sharp results in under three minutes — with no skill, no guesswork, and no risk of burning the steel.
"I handed it to one of the guys on site — someone who'd never sharpened a chain in his life," Werner recalls. "He clamped it onto the guide bar, turned the handle along each tooth, and was done in under three minutes. Then he fired up the saw."
The chain cut cleaner than anything the crew had sharpened by hand all season.
"By the end of that week, every man on that site had asked me where to get one," Werner says. "Nobody could believe something that small could produce results like that."
What started as a field prototype for professional logging crews eventually became Qamotors — a precision chainsaw sharpener now used in more than 60,000 households across Australia.
- Automatic angle lock Clamps directly onto your guide bar and locks the sharpening angle automatically — the same method professional forestry crews use in the field.
- No skill required Turn the handle along each tooth. The tool guides the entire process. Anyone can use it correctly on the first attempt.
- Works on any chain Compatible with virtually all chainsaw bars, from small homeowner saws to full professional rigs.
- Compact and portable Small enough to fit in a shirt pocket and light enough to carry on any job site — no cables, no electricity, no bulk..
Qamotors is ideal for anyone who:
- Stop paying sharpening shops A$30-A$40 per visit for results that don't last
- Bring chains back to life that they assumed were ruined
- Sharpen on the job site without hauling heavy equipment
- Cut faster, cleaner, and safer without buying replacement chains
Timber contractors, arborists, tree services, and serious homeowners with acreage are the core users.
But weekend firewood cutters and property owners with occasional clearing work are buying it just as fast.
Spring cutting season is here — and demand for Qamotors has increased.
"Production is scheduled in batches," Werner explains.
Because this is a specialized tool, availability can vary by region and delivery window.
Customers should check the form below for current Australian availability before placing an order request.
"I brought three chains to a shop last year and spent A$120 to get them all sharpened. Two sessions later they were dragging again. I've run Qamotors on those same chains four times now. They're still cutting clean. I don't know what the shops were doing but it wasn't this."
Storm came through and dropped six big pines on my property. My chain was half-dead going in. Clamped on the Qamotors, three minutes, and I worked through the whole job without stopping once to re-sharpen. That's never happened before."
"I was skeptical because it looks too simple. But that's the point — it locks the angle for you so you can't get it wrong. My son tried it on his first attempt and his chain came out sharper than anything I've done by hand in 20 years of filing."
Qamotors is currently offering 50% off on this production run through the order form below.
Craig's advice is simpler than that.
"You've got chains sitting in your garage right now that you think are dead. Run Qamotors on them first. Then decide."
Interest has increased since this article was first published. Current availability and promotional pricing may vary by location and inventory. Please review the form below for the latest order details before submitting your information.
Click here to check availability and check current availability →
Offer details are available through the Qamotors order form. Not available on Amazon, eBay, or in any retail store.
Complete the form below to request the current 50% offer. A support representative may contact you to confirm availability, delivery details, and final order terms before processing.
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