I can square grind with my round grinder

[davidwyby]

@Square Cutter shoot me a PM if you wish about one for the USG.

 

[Meadow Beaver]

When will these be available? I want one

 

[Woodslasher]

@Square Cutter shoot me a PM if you wish about one for the USG.

Teh debil says you need to cough up for a new Simington instead! On a more serious note, my neighbor has a 70's or 80's Foley that he can square grind chains on. It's not a square grinder, but between profiling the wheel and fiddling with the settings he's able to do it. I've tried to do it on my Oregon but no dice, so this'll be great for a cheap basta..... frugal gentleman such as myself.

 

[northmanlogging]

I've been round filing for a long time and heating my house with wood. I love it so much its turned into a hobby. Square grinding was expensive for me to get into so I made my own jig and I can get a desireable square grind. The top plate and side plate angles are easily and fully adjustable but the sharpness is limited to 40-45 degrees for the top plate.

You could potentially offer the "jig" in different angle combinations though 40-45 is probably good enough I think 30 would be better, though yer limited by the height and width of the "jig", another potential option would be to have the jig be adjustable to some extent.
When I first saw this thread, I was thinkin this would be total BS, but what you have goin is pretty skookum. Best part is in naturally gets the "gullet" that everyone seems to whine about with square ground chain, that if you dress your stone correctly, isn't an issue on a "factory" square grinder.

Maybe even offer a clamp on stone dresser so the side plate angle could be held consistent?

Anyway, PATENT THAT S before someone steals it.

 

[davidwyby]

@Woodslasher I will have to see how much tilt I can get out of my USG.

 

[Philbert]

Even if this jig only allows a limited range of tooth angles, it still could be an accessible way for an average guy, with an Oregon style grinder, to convert a loop of round chain to square: then refine the angles with a file.

Have you tried it on a range of different pitch chains? I am assuming that that is what some of those little marks are for?

Philbert

 

[Square Cutter]

You could potentially offer the "jig" in different angle combinations though 40-45 is probably good enough I think 30 would be better, though yer limited by the height and width of the "jig", another potential option would be to have the jig be adjustable to some extent.
When I first saw this thread, I was thinkin this would be total BS, but what you have goin is pretty skookum. Best part is in naturally gets the "gullet" that everyone seems to whine about with square ground chain, that if you dress your stone correctly, isn't an issue on a "factory" square grinder.

Maybe even offer a clamp on stone dresser so the side plate angle could be held consistent?

Anyway, PATENT THAT S before someone steals it.

Thank you. Yes I have three different chain holders for different sharpness of top plate. 80 90 and 100 degrees. But yeah i do have a provisional patent on it.

 

[Square Cutter]

Even if this jig only allows a limited range of tooth angles, it still could be an accessible way for an average guy, with an Oregon style grinder, to convert a loop of round chain to square: then refine the angles with a file.

Have you tried it on a range of different pitch chains? I am assuming that that is what some of those little marks are for?

Philbert

3/8 or .404 pitch is the only ones without flipping the wheel but you could run it on 3/8lp if you want but you have to shape one side of the aluminum oxide and then flip the wheel over

 

[Square Cutter]

When will these be available? I want one

Sweet! Should be out this winter. What round grinder do you have? I still need to compile a list of all the compatible grinders.

 

[Square Cutter]

Even if this jig only allows a limited range of tooth angles, it still could be an accessible way for an average guy, with an Oregon style grinder, to convert a loop of round chain to square: then refine the angles with a file.

Have you tried it on a range of different pitch chains? I am assuming that that is what some of those little marks are for?

Philbert

The top plate angles are fully adjustable as far as relation to the witness mark but I have only three different sharpness angles for the top plate. So if you are cutting soft green wood there is the 40 degree, then 45 and 50. I figured maybe for dry or hardwoods a less thinned out top plate may hold up better.

 

[Philbert]

you could run it on 3/8lp if you want but you have to shape one side of the aluminum oxide and then flip the wheel over

Not a deal breaker. Used to having separate wheels for 3/8” low profile chains. Not a problem having a few, separate, $15 - $25 wheels for square grind.

Smaller pitch square ground / filed chain has mostly been a ‘novelty’, as it is not supported by manufacturers, and it can be hard to fit a double bevel chain in there. If your jig allows it, it could open up a new option for lighter weight and pruning saws.

Philbert

 

[Meadow Beaver]

Sweet! Should be out this winter. What round grinder do you have? I still need to compile a list of all the compatible grinders.

I’ll buy whatever grinder this jig will fit. Been on the verge of buying a 451c but I stumbled upon this.

 

[Square Cutter]

I

I’ll buy whatever grinder this jig will fit. Been on the verge of buying a 451c but I stumbled upon this.

Right on. It works for sure with the Oregon 410-120. It's 220 on Amazon. What size drive links do you run? I'm making them for .050 and .063 to start. Or if there are a lot of requests for .058 I'll start making those too.

 

[Square Cutter]

Even if this jig only allows a limited range of tooth angles, it still could be an accessible way for an average guy, with an Oregon style grinder, to convert a loop of round chain to square: then refine the angles with a file.

Have you tried it on a range of different pitch chains? I am assuming that that is what some of those little marks are for?

Philbert

The ruler is just to measure the length of the tooth when switching from sharpening left hand cutters and right hand cutters.

 

[Meadow Beaver]

I don’t run $3 bill .058 chain. .050 on up to 28” and .063 above that.

 

[John Lyngdal]

What a great design.
Adding the feature to dress the wheel would be a huge plus, unless you could find a CBN wheel manufacturer that would make wheel with the correct profile.

 

[Square Cutter]

What a great design.
Adding the feature to dress the wheel would be a huge plus, unless you could find a CBN wheel manufacturer that would make wheel with the correct profile.

Hi John, Thanks. I've made some custom cbn wheels for square grinding and they don't work as well as the aluminum oxide. I think they could work by playing around with the grit size but the pink wheels are just awesome. I'll just offer a diamond hand file to adjust the wheel to start but yeah you are right. A simple protractor with a diamond file on it might work.

 

[Philbert]

I'll just offer a diamond hand file to adjust the wheel

Would a standard dressing brick work?

Philbert

 

[Square Cutter]

Would a standard dressing brick work?
View attachment 1019176
Philbert

I know you get one with a lot of the round grinder machines and they work great for rounding off a pink wheel but they don't do as well at cutting a defined flat surface as the diamond file. Those dressing stones deform after a while as well.

 

[Squareground3691]

I know you get one with a lot of the round grinder machines and they work great for rounding off a pink wheel but they don't do as well at cutting a defined flat surface as the diamond file. Those dressing stones deform after a while as well.

Norton Norbide Sticks work very well for petrified wheels, but are pricey, although they last forever.