Bush Knife from Japan Woodworker


This review consists of :

Specifications

The Garden Machete is hand-forged and has a laminated steel construction. There are no details available on what steels are used in the laminate. The handle is made from red beech. The scabbard is a plan wood case. The blade length is 10" and the overal length is 16" . Some specifications on this one :

More specifics on the grind, the angle is 6.5 (5) degrees per side, this is very acute. There is a secondary bevel but it is just visible, it is less than 0.005" thick.

Initial impressions :

This should make an excellent light to medium machete. The primary grind is very acute and tapers to a very fine edge so the cutting ability and ease of sharpening will be very high. However the same geometry would likely pose durability concerns on heavier work. This is definitely a precision cutting tool more so than an emergency/survival tool.

Stock testing : main

The initial sharpness is decent for a large knife, it takes 240 (1) g to cut Esprit baisting thread, and takes 0.5 cm to cut light jute under 500 g of tension. This is about 30% of optimal sharpness. With this sharpness the knife slices newsprint well and will scrape shave a little.

Comparing the rough carving ability to a #1260 Mora on some pine (0.5x1.5") making two inch points the relative ability was kind of interesting. The bush knife has a more acute edge, almost half of the angle, but while it has an advantage it is never close to what would be expected from the angle ratio which would predict about a 40% cutting advantage. When light force is used with the knives, 5-15 lbs, the bush knife has clear advantage but only about 20 (5%). The reason that the performance does not increase as much as might be expected due to the angle comparison alone is that the Mora has a much more efficient handle/blade design for power cuts next to the handle. With the Mora the blade is right next to the handle so full power can be used with no counter torque. However the sharpened edge on the bush knife starts significantly infront of the edge and the top of the handle is squarish which prevents a full forward grip. In fact when very heavy force is used (50-60 lbs) the Mora actually pulls ahead by about the same amount, 20 (5) % because of the strong counter torque of the bush knife in really heavy cuts. Of course wrist strength is critical here, the stronger the wrist the lower the effect the counter torque will make.

ESEE Junglas chopping some local woods.

Food

One thing which would please a lot of people is that the initial sharpness on this knife, which is obviously meant to be a light machete, is actually going to be higher than most kitchen knives. This bush knife easily sliced up bread, including a number of very hard crusted rustic italian and french multi-grain loaves. Yes it did require a "dead" pass on the break to break the skin and start the cut but it was able to easily slice the bread without and damage and very easily though it would be outperformed in regards to force required and ease of starting a cut by a dedicated bread knife with either a scalloped or x-coarse finish. But again this is a matter of a couple of pounds of force and the lack of the starting cut.

Moving on to a tomato, another standard test of sharpness, the bush knife did very well, easily making thin slices on a not so fresh tomato and required no dead slices to start and immediately started the cut right as the draw was initiated. The dropped blade works well right to a cutting board and essentially this acts very much like a heavy slicing knife. Outside of the weight, which is about double for a dedicated kitchen knife of its type, it works pretty much ideally for this type of work. No handle issues and just a nice long blade with a very thin and acute edge which cuts very well. This of course is not stainless and so will start to patina immediately in use. This would need to be dryed and likely even oiled very diligently to prevent surface corrosion.

Utility

Comparisons

Cutting up some materials alongside the MT-151 :

The results were kind of interesting, in terms of which knife did better, the bush knife was slightly better on all materials except the styrofoam. On the foam the thicker but more wedged shaped Mt-151 (full flat grind) seperated the material easier whereas the bush knife would bind. Both knives however cut well and the difference between them was so slight it would have to be carefully measured to notice it. On the carboard for example it took about six lbs to make a 30 cm slice with the bush knife and about seven lbs with the Mt-151. In general the handles were the largest difference as the large guard on the MT-151 was awkward as always for utility work.

Overview

Comments and references

Comments can be emailed to Knife Review :

Most of the pictures in the above are in the Bush Knife album at PhotoBucket.


Last updated : 11:29:2011
Originally written: 11:29:2011
Up