68jx .404 chain sharpening

[dahmer]

I recently got my Makita 9010 set up with a 41” bar and Oregon 68JX chain, .404 full skip. I see it’s square ground. How big a difference will I notice when I round file? Square filing is out of the question before you mention it. My hand shakes are bad enough that I bought a Stihl FG2 filing jig. Will performance still be good with round filing or will I need to hire somebody to square file it . Thanks.

 

[davidwyby]

Round 404 is great.

 

[Nutball]

It looks round from the pictures on loggerchain.net and doesn't mention square. Kinda pricey too, and I need some for my 9010.

Is your 9010 ported? Do you know the numbers if it is? I'm just curious.

 

[dahmer]

It looks round from the pictures on loggerchain.net and doesn't mention square. Kinda pricey too, and I need some for my 9010.

Is your 9010 ported? Do you know the numbers if it is? I'm just curious.

Porting was done by @Miller Mod Saws.

 

[Maintenance Chief]

Porting was done by @Miller Mod Saws.

Square cut chain is always gonna cut a little bit faster depending on who sharpens it.
Honestly though a very good round .404 is gonna throw big enough chips you won't notice.
I prefer a 1/4 file for .404 but if your more comfortable with the 7/32 it works too.

 

[PA Dan]

68JX is round ground. Oregon 68CL is the square.

 

[PA Dan]

I used Google to double check myself and Baileys says 7/32 file or 3/16 wheel for sharpening. Then father down they say three sided chisel bit file?

 

[dahmer]

68jx from factory bag.

 

[PA Dan]

68jx from factory bag.
View attachment 326224

Interesting...not quite square but not quite round either?

 

[dahmer]

Interesting...not quite square but not quite round either?

It threw me, that’s why I posted.

 

[PA Dan]

Round file it like normal.

 

[davidwyby]

Looks like hexa

 

[bradb123]

I recently got my Makita 9010 set up with a 41” bar and Oregon 68JX chain, .404 full skip. I see it’s square ground. How big a difference will I notice when I round file? Square filing is out of the question before you mention it. My hand shakes are bad enough that I bought a Stihl FG2 filing jig. Will performance still be good with round filing or will I need to hire somebody to square file it . Thanks.

I got 68lx . It's not square , it's round .

 

[bradb123]

I used Google to double check myself and Baileys says 7/32 file or 3/16 wheel for sharpening. Then father down they say three sided chisel bit file?

I sharpen that chain with a 3/16 Diamond cbn wheel .

 

[bradb123]

Here's pics of square ground and a picture of 68lx .

 

[Wilhelm]

Round filed is perfectly fine for most users that do not chase every millisecond in cutting speed!