The simplest tool for sharpening in the field in the English literature is called Dog Bone, which can be translated not only as a dog bone, not like a bone for a dog. However, the point is not, how to call, much more essential how to use.
Portable sharpeners Dog Bone from Lansky and GATCO, editing and sharpening knives with sharpeners dog bone in field and field conditions.
Basically, the dog bone Dog Bone is usually an aluminum-ceramic abrasive rod with a length of about 3 inches (75 mm), usually of medium grain size, finished at the ends with plastic stops. The cross section of this rod may be different for different manufacturers and in different models..
From artlessly round, through the triangular right up to complex shaped profiles that provide the user with advanced sharpening capabilities. Including allowing to sharpen concave and serrated blades or point points. In fact, all dog bones have such narrow working surfaces that moderately concave blades can be ground on almost any of them. And what is not too accurate is not a problem!
I already said that in the field we do not sharpen the blade in full, with a thorough formation of a cutting wedge. And we just correct and slightly grind it, trying not to allow noticeably deformation of this wedge itself. We have no chance to bring the cutting wedge to Dog Bone, but you can correct and sharpen it very successfully and fairly quickly, without undue effort. The biggest advantage of dog bones is their relatively low price..
Even if you lose or damage Dog Bone on a trip, you probably will not have an irresistible desire to commit a ritual suicide due to extreme nervous breakdown due to loss. Efficiency is also quite acceptable. And in terms of price, weight and size – just fine. To correct and sharpen the blade after serious work with a knife or an ax, it is enough, as a rule, to dozens of passes on each side of it. Of course, this will not be razor sharpness, but for real work with a knife or an ax it is quite enough. There will be a bit more work with the blades, but they don’t cut bread with them..
The next advantage is the enormous mechanical strength of Dog Bone. Once, for testing, I threw one of my dog bones with all my might on a stone floor, stamped my feet on the same floor. Nothing happened to her. When struck, it always hits the stone with one of its spring-trimmed ends. And to break such a profile with a static load, for example, stepping with your foot, it would not be easy, even if it was made of glass of decent quality, aluminum-ceramic is much stronger.
The advantages include the unpretentiousness of dog bones and the simplicity of working with them. True, the aluminum-ceramic abrasive is quickly clogged with particles of steel polished from the blade, but it can be relatively easily cleaned with ordinary wet sand. The most significant drawback of Dog Bone is, paradoxically, one of their advantages, namely its small size. It is difficult to confidently hold such a small object in your hand, and the very shape of the dog bone determines that at the end of each passage the blade stops dangerously close to the fingers holding the device.
The truth is separated from them by a plastic knob at the end of the dog’s bone, but … one wrong move and we risk cutting ourselves. And this is completely useless to us. In general, caution will not hurt.
Dog Bone by Lansky Sharpeners and GATCO.
A few dog bones from my collection of portable sharpening tools and accessories. The first two are to the left of Lansky Sharpeners. The first has a triangular cross section, the second two sides are slightly rounded to facilitate sharpening of concave blades. GATCO Triseps bone to the right. All three are medium grains, which allows you to quickly, although not with razor accuracy, under the field conditions to sharpen the blade of a knife, ax, and if you really need it, then the blades. The length of the working surface of most dog bones is about 75 mm, the weight varies about 35 g.
Depending on the imagination of the designers and manufacturers, the dog bone can have a diverse cross section of the abrasive core. GATCO Triseps, for example, in addition to conventional blades, allows you to sharpen concave and serrated. For this, different faces of a triangular rod in the cross section of the rod are rounded under different radii.
As well as point tips, for this there are already two grooves of different widths. It is not known whether it will be needed, but at least it will not hurt. But the fact that during sharpening the blade moves towards the fingers holding the dog’s bone and stops only in the immediate vicinity of them, this is a fair drawback of all such devices without exception. The chains that the dog bones are equipped with, being worn on the finger, help to hold the device more confidently during operation. But they do not insure themselves against the risk of cutting themselves..
Excerpt from the book of Sergei Mitin How to sharpen knives.
Published with the consent of the author.