Semi Chisel, Full Chisel, Hexa, Square Ground Shoot out time based

[@duck-n-cover477]

Love the deep dives...how you take both analytical and practical perspectives. It's like you have a saw lab. Opens up the world of saws and chains!

[@ChainsawUsers]

I appreciate that!

[@gloriaamando4491]

I enjoy watching your Fantastic video , great cut spanner man💪👋👋👋

[@ChainsawUsers]

Glad you enjoyed it

[@BobE.Dancho]

Good video

[@ChainsawUsers]

Thanks for the visit

[@shinichirohida2556]

Great cuts. When Filing a saw chain with a square file, there can be leftover burrs under the side plate, known as gullet residue. It is generally recommended to file the gullet once every five filings, but sincce this can create cutting resistance, if possible, try filing it every time to keep the gullet clean with round file.

[@elpolaco7654]

To make the test fairer you would have to use Hexa chain as a starting chain to get other chisel profiles, since Hexa has a narrower kerf, thus automatically having an advantage over Rapid Super. Comparisons between round-ground and square-ground chain were done many years ago by forestry organizations in Europe, and the conclusions were that square-ground chain has very similar performance to round-ground chain in cross-cutting. On the other hand, it has an advantage in diagonal cutting and along the grain. What significantly differentiates the square-ground chain from the round-ground one is better resistance to damage especially in hard/frozen timber. Another advantage is better behaviour in plunge cuts (boring).

[@ChainsawUsers]

Yes, good comments. I just wanted to try square ground for myself and see. Chainsaw Theories had been doing this for a while with good results. For me, I found it very time-consuming to get a small gain. My favourite is still Hexa over any other profile. But, results will have variations due to inconsistent sharpening techniques. To really evaluate anything, the test samples must be consistent. This means the log specifications dia density moisture, etc. The chain must be sharpened to maximum sharpness, and the rakers need to be checked for the correct height. That said, it was just a simple test with reasonable, accurate, repeatable results.

[@markkillalea1641]

Great video. Could you get the same result square grinding with a profiled stone disc.. I watch all your videos I’m waiting for you to do one on the x-cut chain as I’ve bought 3 of them.. thanks mate.. 🇮🇪

[@ChainsawUsers]

I have x-cut it faster than full chisel but a second or so. Not a lot in it but its close to Hexa not much in it at all

[@SawChainTheories]

The good news is, the first chain you file is the hardest. With more practice the square becomes easier and eventually, its just like round filing. What side are you better at? I'm more comfortable filing the left hand cutters but do a better job on the right for some reason

[@ChainsawUsers]

Yes I noticed that I was better at left side cutters but got used to doing the right side. A lot of work for a small gain. But as you say you will get better at it in time

[@ChainsawUsers]

I did file the gullet cleared the shelf to around 1mm Thanks for your comment

[@nseric1233]

I think you can make that semi chisel faster than that, the saw didnt have a lot of load on it with the semi chisel chain. I started sharpening my semi chisel chains like hexa, it seams a touch faster then regular round ground semi. Part of that was to see what it would do, the other part was I didnt feel like changing the wheel on the grinder for one chain lol.

[@ChainsawUsers]

Yes I felt the semi chisel was abit slower than it should. Variation will always raise its head in these test. If you resharpen the chains again you will get some small changes again. I also did a hexa grind on semi chisel was no improvement for me. Maybe I went to deep on the side plate

[@gunterbecker8528]

One day I'll try it

[@elpolaco7654]

@@ChainsawUsers Perhaps it is indeed possible to obtain a faster semi chisel chain. On the other hand, your results are fully in line with those obtained by organizations that rather very carefully prepared such tests. Differences will also depend on the type of wood (hard, soft, etc.).

[@ChainsawUsers]

​@elpolaco7654 Yes agree with all that. Many variables when comparing chainsaw grinds. HP is a big factor and can make a huge difference time related. If you sharpen by hand you will get a different result. It may only be .5 of a second but any hand filling is never as consistent as a mechanical grinder. Grinders will give reproductive results time and time again over and over. But that said human error can also produce poor results

[@duck-n-cover477]

If you optimize for one factor, you sacrifice others. Pick the factors that work most against you and optimize for the system, not just the chain grind.

[@ChainsawUsers]

Good advise

[@gregwilliams5605]

Brand new full chisel Stihl chain mentioned at start

[@ChainsawUsers]

All the chains were new used maybe once and resharpened.

[@duck-n-cover477]

Time savings is a percentage of a percentage. If you spend 1/3 time cutting, 1/3 moving around and limping, and 1/3 planning, set up, take down...time saving from 25% faster chain is .25x.33 or 8%. That's 38 minutes in an 8-hour day, but then you have to subtract from that savings the less durable edge (25% less durable?) and lower time efficiency sharpening (25% more time to sharpen?) or deduct for time swapping chain more frequently. So again, take that 38 minutes time savings and cut it in half or down to a quarter. That's 8 minutes savings in an 8-hour day, square versus semi. This shows that the speed of chain grind profile doesn't matter much, BUT matching the chain to cutting conditions and the application technique or approach to the work, saw maintenance, and site conditions, are what matter most. Thoughts? Will be watching...more great videos.

[@ChainsawUsers]

Yes your comments are correct any time saving is good. I take 6 chains in the field so easy to swap them over. I mainly use Hexa or Full chisel because they are faster.

[@duck-n-cover477]

Have you compared your 500i with the 20" 3/8 8-tooth or 25" 3/8 7-tooth sprocket against the 20" .404 7-tooth? I'll be trying my 592 with 24" .404 7-tooth instead of 3/8 8-tooth.

[@ChainsawUsers]

On the 500i you can put 8 tooth spoket using 20 inch bar it works ok. But in 25 inch and above I use 7 tooth sproket. But never time based testing on that. Just a gut feeling