My Drf255- ported 036 VIDEO

[Backtroller]

I know but it's kind of like putting a ding in a car your new car before you even made it home.

Seriously?

It's just a chain. Fuggit

 

[Backtroller]

IMO, this is one of the best places to start with understanding square file:

http:www.madsens1.com/bnc_cb_angles.htm

Cool page. There is more involved than I thought. How long can you expect to spend on a 20" 72 drive link chain?

 

[Backtroller]

One more

 

[Moparmyway]

It hit a maple tap. Now I'm not sure what shape to call the teeth, or what's left of them.

Al, if you want that chain back to square and sharp .................. lemme know

 

[Backtroller]

Al, if you want that chain back to square and sharp .................. lemme know

Very cool of you

 

[MustangMike]

You have to go slow & careful at first, but once you get it down, I can square file sharpen just as fast as round (by hand).

I have developed a routine. I use a stump vice on the bar, but it on a wooden box (that I haul my chainsaw stuff in) and sit near it on a stool (intended to do car breaks). This puts the bar lower than I would for round filing. I do one side at a time, and move each tooth to the same place to keep the angles consistent.

I have 45 degree lines drawn on the top of the box to help me keep the angles correct (or I find myself reverting to the old 30 degrees). When the tooth is where I want it, I put a paint stirrer behind it and pinch the stirrer to the bar with my off hand and sharpen the tooth with the other hand (keeps the tooth from moving, and saves you from putting the chain break on & off a million times). It seems to work well for me.

Remember, with square file you go from outside in (instead of inside out), and the file is really 6 sided, not square. And don't be concerned if you touch the straps on the opposite side, you will.

 

[Backtroller]

So if I understand correctly the file is a hexagon? What size do you need for 3/8"? I'd really like to try this.

 

[MustangMike]

Don't mean to post the competition, but was the only place I could find a good pic: You want one that looks like this, the ones that look like a triangle with flattened edges contact the off side of the chain too much.

http://www.baileysonline.com/Chains...es/Pferd-Double-Beveled-Chisel-Files-Each.axd

 

[MustangMike]

The companies make flies specifically for sharpening square file chain. That is what you need.

Other files will not have the right height for the inside top plate.

 

[Backtroller]

Cool thanks for posting this. I'll check it out.