Sharpening Mora Pro Robust & Hultafors GK

Mora Robust Pro & Hultafors GK Heavy Duty KnifeAfter the abusive field test and pull ups, it’s time to restore the edges of the Mora Robust Pro and the Hultafors Heavy Duty.

There are numerous ways and sharpening systems available. However, none of them will be perfect and suitable for all the different blade types and designs.


People are generally unable to maintain an angle while sharpening, therefore, we inevitably create edges which are more or less convex. To avoid that, we invented various useful devices, which hold a knife, as well as the sharpening stone, at a fixed angle. One of such devices is the Lansky Deluxe Knife Sharpening System (in the picture above), which allows us to create those perfect, razor v-shaped cutting edges.

The problem with such edges is, as shown in the test, that they are fragile. They tend to chip, roll and dull quicker than convex edges. Yes, they cut better but is it really noticeable in a day-to-day use of a utility knife? Take a look at the video below, where I show how a strong convex edge push cuts paper towel. Do you really need your bushcraft/survival knife to be sharper than that? I know I don’t.

Therefore, for my bushcraft or EDC knives I tend to use other sharpeners and save the Lansky System for special occasions. If I’m out in the field, I might use a simple double sided DC4, which can bring your edges to hair popping sharpness even without a strop. It’s small and lightweight which makes it easy to transport. I might also use an even smaller, lighter and simpler diamond pen rod, which also works well, although, it seems to require a strop as it is much coarser.

Those are great in the field but at home their, otherwise advantages, small size, makes them quite inefficient and less safe. It takes more time to remove steel with such a small sharpener, plus it’s easier to cut yourself when you have to manoeuvre round small surface with a large sharp object.

For me the choice is simple. At home I use water stones grit 400 to 3000, followed by a home-made strop. While they are a bit a pain to use as they need to be soaked in water for several minutes before use, they get worn out and need to be evened up every now and then, and the whole process of sharpening can be a bit messy, they are still the best option for more serious home sharpening. Why? They’re relatively inexpensive, they don’t have moving parts (easy to use and can’t break unless you drop them on the floor), don’t require extra special equipment, are large enough but not too large, and do not determine your sharpening angle, which allows you to slightly convex your edges if you choose to do so.

Hultafors Heavy Duty vs Mora Robust Pro Abuse Test

Hulk vs MoraA viewer asked me to do with the new Mora pro, what I did with the Mora High Q Robust. He simply wanted to know if the new knife would be as strong as the old one. So here I am, pulling my self up on knives again 🙂

This time, however, I decided to make it even more interesting and include my favourite inexpensive bushcraft/survival knife – Hultafors GK Heavy Duty Knife. I haven’t done this test before using this knife and I wanted to know for myself what exactly would happen. Obviously, these tests are not very scientific, as there’ll be many variables I can’t control for. But just out of curiosity… How much abuse can your knife take?

My usual tests such as batoning didn’t surprise me at all, but carving that hard seasoned hazel did something I did not anticipate. It was much harder than I’d expect hazel to be and made a serious impression on both blades.

When it comes to the pull ups, no big surprise there. Although, conditions were a bit different – the knives wouldn’t go in as deep as the old Mora – and that didn’t go unnoticed. Both knives bent slightly. I was able to straighten them up but, despite the fact that Mora was a bit shorter and probably didn’t have to take as much weight as the Hultafors, I was a bit surprised to see this knife to wobble and bend that much. It felt soft. Much softer than the Mora.

That’s not to say it’s better or worse. You should never have to use your knife like that anyway. It’s just something I wasn’t aware of up until that point.