The Work Sharp Ken Onion Edition MK.2 is Work Sharp’s collaboration with knife designer Ken Onion. It took the belt grinding method custom makers used by hand. Then it built that method into a machine anyone can run at home.
At its core this is a variable speed belt sharpener with an adjustable angle guide. The manufacturer lists seven LED speed settings. The guide itself locks blade angle from 15 to 30 degrees.
That range lets one machine handle a thin fillet knife and a thick outdoor blade. No tool swap needed between them. This guide covers the current model, its upgrade path, who it suits, and where owners run into trouble.
What the Ken Onion Edition Changes About Belt Sharpening
A fixed guided sharpener drags a blade through a set slot at a set angle. This machine spins a belt under a moving blade instead. The leather lined guide can be dialed anywhere from 15 to 30 degrees.
The manufacturer lists five belt grits in the box. They run from P120 extra coarse down to a 6000 extra fine finishing belt. That spread is meant to take a damaged edge from reprofile to polish on one machine.
A tool cassette with a 65 degree scissor guide ships in the box too. It handles kitchen and craft scissors. Variable speed rounds out the package, with slower settings suited to light touch ups.
Faster settings suit a neglected edge that needs real metal removed. That is also where risk goes up. A blade held too long against a fast belt can overheat or round a tip.
| Setup | Type | Best for | Price band | |
|---|---|---|---|---|
| Ken Onion Edition MK.2 | Variable speed belt sharpener | Most kitchen and outdoor knives | around $200 | |
| Blade Grinding Attachment | Add on belt grinder head | Owners who sharpen often or profile heavily | around $150 | Price |
| Standard Work Sharp guided models | Fixed angle guided sharpeners | Buyers who want simple and cheap | lower cost |
Work Sharp Ken Onion Edition MK.2
The Benchmark
Variable speed belt sharpener | 15 to 30 degree angle guide | around $200
This is the machine the whole belt sharpener category gets compared to. Owner reviews repeatedly mention how fast it brings a dull blade back. Reports span cheap kitchen knives up through premium folders in steels like S35VN.
It suits anyone who owns more than a couple of knives. It is not the machine for someone who sharpens one pocket knife a year and wants a simple guide slot.
Pros
- Wide 15 to 30 degree angle range covers most blade types
- Five included grits handle reprofile through polish
- Variable speed control for light touch ups or heavy repair
Cons
- Real learning curve before belt changes feel natural
- Aggressive at higher speed, easy to remove too much steel
- Some owners report a slightly convex edge over time
Work Sharp Blade Grinding Attachment
Upgrade Pick
Add on grinder head | 1 inch by 18 inch belts | around $150
This attachment bolts onto the MK.2 base unit. It swaps the small belt for a longer 1 inch by 18 inch belt. The manufacturer lists a wider 10 to 35 degree angle range and three convex edge profile settings.
Two reference plates help hold a repeat angle. This is a real upgrade for someone who sharpens often, not a starter purchase. It requires the base unit and is sold separately from it.
Pros
- Longer belt exposes more abrasive per pass
- Wider 10 to 35 degree angle range for specialty grinds
- Reference plates make repeat angles easier to hold
Cons
- Adds real cost on top of the base machine
- Belt changes still take practice to get quick
- Overkill for someone who only touches up a few knives a year
Who This Sharpener Suits
Owners with a mixed knife collection get the most from it. Kitchen knives, hunting knives, and outdoor blades all fit the 15 to 30 degree range. No second tool needed.
Fans of a convex edge also do well here. The belt naturally rounds the shoulder as it works. Anyone who wants a crisp flat bevel for competition cutting should look elsewhere first.
Where Owners Get Into Trouble
The recurring complaint is speed getting away from a new owner. A blade held a moment too long on a fast belt can round a tip. It can also pull too much steel before the mistake registers.
The learning curve is real, not marketing talk. Several owners describe needing a handful of practice runs, including a few belt changes, before it feels natural.
A smaller group of knife makers reportedly worry about heat from the belt affecting heat treat. That claim is disputed, not settled. Treat it as a caution, not a proven failure.
Belt Consumables for the Ken Onion Edition
The five grit set that ships with it runs from P120 extra coarse through two mid grits to a 6000 extra fine belt. That spread covers reprofiling through a near polish finish on one machine.
Replacement belts are a real ongoing cost. They wear the same way sandpaper or stones do over repeated use. Buyers adding the Blade Grinding Attachment should expect a separate, larger belt size.
Ken Onion Edition vs the Rest of the Work Sharp Line
Work Sharp also sells simpler guided sharpeners built around a fixed slot. Those cost less and ask almost nothing of the user. That suits someone who wants a knife sharp again without learning a machine.
The Ken Onion Edition trades that simplicity for range and speed. See Work Sharp’s full range of sharpeners for how each model in the lineup stacks up against this one.
Once you own one, technique matters more than the machine. Our step by step guide to running yours covers belt selection and pass count in more depth than fits here.
Mistakes to Skip
Do not start on the fastest speed setting with a good knife. Learn the feel on an old kitchen knife first, at a slower setting.
Do not skip the angle guide to save a step. Freehanding against the belt is exactly how tips get rounded.
Do not buy the Blade Grinding Attachment before the base machine feels comfortable. It adds capability, not forgiveness. Readers weighing belt tools against other formats can see how belt sander sharpeners compare to other machine types.
The bottom line: the Work Sharp Ken Onion Edition MK.2 earns its reputation as the belt sharpener other machines get compared to. It rewards a buyer with a real knife collection and some patience for the learning curve. It punishes a rushed first session on a good blade.
Is the Work Sharp Ken Onion Edition worth it?
For anyone sharpening more than a few knives, yes. The variable speed and wide angle range save real time over stones. Owner reports consistently call the results genuinely sharp.
Does it round knife tips?
It can, if the blade sits too long against a fast belt. That is the single most repeated caution in owner reports. It is avoidable with a slower speed setting while learning.
For general background on how machine sharpening compares across formats, our guide to sharpening machines covers belt, guided, and rotary options side by side.
Is the Blade Grinding Attachment necessary?
No. It is an upgrade for heavy or frequent use, not a requirement. The base machine alone handles most home collections fine on its own.
What belt grit should a beginner start with?
Start with a middle grit on a low value blade to learn feel. Move to the extra coarse belt only when a real reprofile is needed. Save the extra fine belt for final polish passes.
Can the Ken Onion Edition ruin a knife?
It can remove more steel than intended if a beginner lingers too long. Several owners describe this as the real risk with this machine. Slow speed settings and short passes lower that risk while learning.
Readers who want the wider category view can browse everything else we cover on sharpening equipment for comparisons across brands and formats.
Sources
- Work Sharp: Ken Onion Edition Knife and Tool Sharpener MK.2 product specifications. https://worksharptools.com/products/ken-onion-edition-knife-tool-sharpener-mk-2%E2%84%A2
- Work Sharp: Blade Grinding Attachment for the Ken Onion Edition MK.2 product specifications. https://worksharptools.com/products/blade-grinding-attachment-for-the-ken-onion-edition-mk-2_307623
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