Last time I tried on of the PSK sawbacks on wood I wasn’t too impressed.
To refresh my memory, I cut some green hardwood (sassafras?) braches today using a Ontario Pilot’s survival knife. After a lot of sawing I was rewarded with a wide, very shallow notch and a bunch of badly clogged saw teeth – not surprising considering that the PSK’s saw is not intended to cut wood, but rather aluminum aircraft fuselages. After even more sawing on a seasoned maple branch, I was rewarded with an even shallower notch.
For comparison, I dug out a old East German AKM bayonet (the only other blade with a saw back that I have) and tried it on the same green and seasoned hardwood – the results were a little better than the PSK, at least it seems that the saw was designed to cut wood, but it's a lot of work compared to a SAK saw. I would consider the AKM saw back adequate for green wood up to about 1 – 2”…..if you‘re ready for a work out.
The PSK makes a better chopper than it dose a saw. I found that it to be capable of chopping green branches (with a lot more effort than would be needed for a SAK saw) as long as the diameter is not too big (maybe 1 ½ -2” max.). The AKM bayo did not chop quite as well as the PSK, but it was close. A Buck short Nighthawk (5 ¼” blade) out chopped both the PSK and the AKM bayo by a small margin, but I would not consider any of these to be really adequate for the seasoned maple.
The 7” blades are better choppers, but I consider them to be marginal on the seasoned hard wood. I tried a Becker BK7, an Ontario Marine Combat (Ka-Bar clone), and a Cold Steel Bushman. The BK7 chopped best for me, followed by the Ontario Marine and the Bushman. Not a huge difference between them and chopping performance seemed to favor blade heaviness. Even on the green wood I would have preferred a SAK saw to any of these, but these 7” blades can start to give a SAK saw some competition on the more easily chopped wood.
On the green wood a Becker BK9 and an Ontario SP5 Bowie chopped faster and with less effort than a SAK could saw and would about equal one on the seasoned wood - definitely a big step up for the 7” blades when it comes to chopping. In this case, the Ontario chopped a little better than the Becker.
Personally, I would rather use a SAK saw than any of the above 5-7” blades for cutting wood and I would not bother with sawbacks at all. If you want a saw with more performance than a SAK saw get a Gerber/Fiskars pruning saw – one of these will blow away any of the above knives for cutting wood fast and efficiently (saws are safer too!).
If you must have a blade with a wood saw on it, get a SOG Revolver - the saws on the Revolvers really work.
- Frank