How to square file

[mdavlee]

I just hope this one last 3 cuts.

View attachment 19396

It'll go good in soft stuff.

 

[junkman]

I just hope this one last 3 cuts.

View attachment 19396

Looks like a serated steak knife blade

 

[junkman]

View attachment 19348

I cut some hedge today,need some tips to sharpen my 30 inch blade .

 

[psuiewalsh]

Cbn and dremel?

Sent from my C771 using Tapatalk 2

 

[Danders]

Guys, I took a stab at converting a round chain to square using a three corner file in a Granberg. I'm impressed by what you guys are doing freehand.

I think based on what I've seen I'm getting the corners close to correct, but would appreciate comfirmation. Some of the other cutters had the corner a smidge lower than this.


Do I need to clean the gullets more?

 

[Moparmyway]

That came out real nice !
You could take another swipe or two in the gullet, just enough to make the side plate straight all the way down to the chassis

 

[Moparmyway]

I cut some hedge today,need some tips to sharpen my 30 inch blade .View attachment 19401

Pull the cutters off the machine, take them apart and sharpen them one cutter at a time with a hand held grinder. Follow the angles there and keep in mind that they cut at the corner where the blades meet

 

[MustangMike]

I think if you put that chain in wood just the way it is you will have a big smile on your face! Keep us posted.

 

[mdavlee]

Looks nice. Should cut great.

 

[czar800]

Good information!

 

[Wolverine]

sharpen them one cutter at a time with a hand held grinder.

@leadfarmer can help with the handheld grinder advice!!!

Lookin' good Danders!

 

[leadfarmer]

@leadfarmer can help with the handheld grinder advice!!!

Lookin' good Danders!

 

[Moparmyway]

Except I remove the shears from the machine and seperate them to grind each cutter

 

[Danders]

That came out real nice !
You could take another swipe or two in the gullet, just enough to make the side plate straight all the way down to the chassis

Thanks. I do have plenty that don't look as good, but I did find that I could move the corner fairly easy once the file had the basic shape on the cutter. I tried to avoid corners that were to high but I've got a number that are a little low. I think I will go back and try to get them all right.

The Granberg/three corner file setup didn't work exactly like I thought it would. I think I used 35 degrees on the top plate, 25 degrees of tilt, and an eyeball estimate on how far back the file was rotated. I missed the straps on one side, and consistently nicked them on the other side. I'll try to figure out why that is, as it would seem that the cutters have to be different side to side which can't be good.

 

[junkman]

Guys, I took a stab at converting a round chain to square using a three corner file in a Granberg. I'm impressed by what you guys are doing freehand.

I think based on what I've seen I'm getting the corners close to correct, but would appreciate comfirmation. Some of the other cutters had the corner a smidge lower than this.


Do I need to clean the gullets more?
View attachment 23057 View attachment 23058

That's a good looking tooth ,run it ,for those starting square filing ,the way this tooth side plate is will cut pretty smooth ,if you angle the side plate with more hook that makes it grabbier in my experience .

 

[concretegrazer]

Thanks. I do have plenty that don't look as good, but I did find that I could move the corner fairly easy once the file had the basic shape on the cutter. I tried to avoid corners that were to high but I've got a number that are a little low. I think I will go back and try to get them all right.

The Granberg/three corner file setup didn't work exactly like I thought it would. I think I used 35 degrees on the top plate, 25 degrees of tilt, and an eyeball estimate on how far back the file was rotated. I missed the straps on one side, and consistently nicked them on the other side. I'll try to figure out why that is, as it would seem that the cutters have to be different side to side which can't be good.

Your settings sound good from what I remember. The difference in side to side are probably from the notches not being true. So you'll have some variance. If I remember right I had to drop the file a little bit after a few strokes when converting.

 

[Sty57]

Guys, I took a stab at converting a round chain to square using a three corner file in a Granberg. I'm impressed by what you guys are doing freehand.

I think based on what I've seen I'm getting the corners close to correct, but would appreciate comfirmation. Some of the other cutters had the corner a smidge lower than this.


Do I need to clean the gullets more?
View attachment 23057 View attachment 23058

Which Granberg jig are you using for doing this?

 

[Danders]

Which Granberg jig are you using for doing this?

Appears to be a model G104B. The pferd 3 corner is supposed to be around 7/32 in diameter, and a couple of 1/2 inch 5/16 od .219 id spacers from aluminumspacers.com glued to the file allow the file to be rotated to set the cutter tooth angle. There's probably a term for that but I don't know what it is.

There was actually a fair amount of play in the spacers on the file, I wanted the file centered in the spacers so I moused together a fix by wrapped the file with tape until the spacer fit snug. Not very elegant but it seemed to work.

I didn't think any of this up. I just followed the basics of what this guy did:

 

[MustangMike]

I used to use the PFRED 3 corner, but stopped cause it hit the straps on the opposite side too much. The 6 sided file does not hit them as badly, but then you can't use the guide. But since the file rests on the strap on the opposite side anyway, you don't really need a guide, just make sure your corner is lined up and your stroke is straight. I also file on top of a wooden box (using a stump vice on the bar) with 45 degree angles marked to ensure I keep my angles right. You just make sure the file stays parallel to the lines.

 

[quietfly]

I really want to upgrade my grandberg like this guy did. I wonder if a PDF of those is available