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The trick with semi chisel to make it cut good is don't round file it like a chisel chain. Use 35 degrees on the top plate versus 25 degrees as Oregon specs on the LGX-LPX chisel .

Yes I field tested the Oregon 72/73 LG prior to it being introduced in 1982. Also tested the radial ported rim sprockets and the Power Match bars and noses for the later introduction. The first series of the LG chains were spec'd at .030 on the depth gauges. Yes a round ground chisel chain.

For cutting dry or frozen wood. This is what I prefer with a Oregon 73 LGX 3/8 chisel round filed as an example. 7/32" file for newer size cutters, 13/64" with half size and smaller cutters. With the file handle 10 degrees lowered I file the top plate angle at 20 degrees, depth gauges .025" at...

Magnus, actually the first centrifuge air cleaning saw introduced was the Jonsered 2051 Turbo in 1988. Husqvarna didn't introduce their air injection until 1990 on the 262XP. Jonsered 2094 Turbo was the first big displacement saw to get it introduced in 1990. The Husqvarna 394XP in 1991. I've...

I don't have a clue Jed. I never posted a vid in all my life......was something that I always wanted to do though.

Lots of confusion in this thread from everybody trying to understand each other. Maybe it's time some of us post some home made videos at the work bench of how it's done.:D

What Magnus was saying was all cutters on a loop of chain don't have to be sharpened to the same size. If only several cutters get rocked out badly you don't need to sharpen all the cutters down to the same size as the damaged ones are after sharpening. And yes Magnus's cutters are all...

Jed must be running Picco 63PS chisel chain on his top handles. To put a chisel bit edge in that round ground chisel chain you'd have to file the cutters back to blunt with the goofy file. Then you're set to go to file the edges in. I've filed .325 square for curiosity but never the little Picco...

Whatever works for you Chris doesn't need to be changed. I just thought I'd throw that out there for you.

Your wasting the upper part of the file covering it with your hand....unless you have awfully small hands. I always use a file handle and my strokes are the full length of the file........one handed too.

Just waiting to get on the plane with my family ......off to Mexico for 2 weeks. You guys got quite the discussion of sawchain:lol: about shaving hair, watching a chain cut in plastic. I remember those old double end Oberg files , I had a few I bought off Sam Madsen .They were called Oberg...

The only square filing I do is for timber sports and now started to use it on my Alaskan mill. For a arb work chain in my opinion square is useless, the extra time you spend to square file or grind you could have touched up with a round file and still get more production. Big bars big clean...

I just found this thread....the title didn't catch my attention.:D On the original question about the filing stroke with the file handle held 10 degrees down, the same angle is also called "offset grinding" when a bench grinder is used to sharpen round ground chisel chain. Oregon still uses the...