Duke's saw chain

[WI_Hedgehog]

Maybe buy that Nice XS 660 to try it on.

 

[Duce]

I ran some 3/8 84dl full and it cuts. Might want to sharpen it and clean up raker depth. Hard to fault for its cost. Stretch did not occur on loop I used.

 

[Woodwackr]

Got mine yesterday. So, how are people sharpening this chain? Will regular round file or 3/16” grinder defeat the purpose?
I don’t have the tools or the skills for sq filing/grind.

 

[davidwyby]

A 3/16” file would probably be close.

A narrow grinding wheel with the grinder tipped way over would probably match up to the angles.

Sharpie up the cutter and touch it a little at a time and adjust the grinder or file to hit all the surfaces equally. Might take a couple cutters to get it dialed.

This is a similar grind but durable since the cutter face is more vertical. Lean it for way so the edge is thinner and it gets faster and dulls faster.

 

[Woodwackr]

A 3/16” file would probably be close.

A narrow grinding wheel with the grinder tipped way over would probably match up to the angles.

Sharpie up the cutter and touch it a little at a time and adjust the grinder or file to hit all the surfaces equally. Might take a couple cutters to get it dialed.

This is a similar grind but durable since the cutter face is more vertical. Lean it for way so the edge is thinner and it gets faster and dulls faster.

View attachment 407907

I have a bunch of old wheels so may play with dressing one “to fit”
I have switched to CBN but still have the old Ore wheels

 

[Wilhelm]

A 3/16” file would probably be close.

A narrow grinding wheel with the grinder tipped way over would probably match up to the angles.

Sharpie up the cutter and touch it a little at a time and adjust the grinder or file to hit all the surfaces equally. Might take a couple cutters to get it dialed.

This is a similar grind but durable since the cutter face is more vertical. Lean it for way so the edge is thinner and it gets faster and dulls faster.

View attachment 407907

That is a ugly looking raker!
No love rounding the front for less shock load to the chain?

Cutter looks durable but slow.
I guess You have to make compromises in the stuff You are cutting.
Kinda makes me glad I mostly buck two species, oak and beech - I tune my chains for oak and it just zips through beech.

 

[sundance]

I got some 3/8LP. Haven't run it yet, but it will be sharpened with a 5/32" round file when the time comes.

 

[davidwyby]

That is a ugly looking raker!
No love rounding the front for less shock load to the chain?

Cutter looks durable but slow.
I guess You have to make compromises in the stuff You are cutting.
Kinda makes me glad I mostly buck two species, oak and beech - I tune my chains for oak and it just zips through beech.

That is an old .404 chain I got somewhere and the rakers were already a mess, too
Low and uneven, probably why it was for sale. The 461 doesn’t care . That grind is dramatically more durable than a standard round hook cutter.

 

[Woodwackr]

So, played with dressing an old 3/16 Ore wheel and was able to get damn close to the Dukes grind on a trashed chain.

Changed main grinder from 55° to 50°. Any lower and I hit the raker.

May try a 1/8" wheel and drop to 48-45°...but, tdoing that will reduce the amount of side cut.

IMO, it would be a major PITA to keep re-dressing a standard wheel for these chains other than minor touch-up grinding.

Duke’s…you should contact some of the CBN mfgs and see if they can make a wheel that configures to these chains. The trick will be finding a happy medium for wheel thickness hat will work through the life of the chain.

sample chain used is a Stihl comp chisel, pro chain that was too badly damaged to bother grinding If you see the rounded point, yup…why it went in the recycle box. I was mainly looking at the profile.

 

[davidwyby]

 

[Woodwackr]

I sharpened one the other day with the standard 3/16" round wheel and it came out very nice. Will see how it cuts compared to new later on...
IMO, trying to duplicate the original is a waste of time and effort without a special wheel.

 

[WI_Hedgehog]

Balls Duke's got a wide kerf.

Great info @davidwyby.

 

[drumbum]

Doug is a little confused about side plates cutting. It only cuts the the thickness of the chip according to depth gauge

 

[davidwyby]

Doug is a little confused about side plates cutting. It only cuts the the thickness of the chip according to depth gauge

I betcha get more cleaning out a face cut

 

[Gullet]

Looks like Duke has all sizes back on stock on ebay.

 

[drumbum]

I betcha get more cleaning out a face cut

More than what?

 

[Woodwackr]

Looks like Duke has all sizes back on stock on ebay.

Almost
no 91dl for Stihl 28”

 

[davidwyby]

More than what?

More than a few thou at the top.

 

[drumbum]

More than a few thou at the top.

I don't understand what you are saying.
The top plate takes a cut and the side plate severs it and makes a chip, according to the "bite" the depth gauge allows.

Are you implying Doug was correct in saying the side plate "cuts" down as far as he was indicating?

How?

Not sure I want muh cutters playing a left n right tug o war......

Maybe it is a hi tech chip mulching action that turns chips to dust?

LOL

....no offense intended

 

[davidwyby]

I don't understand what you are saying.
The top plate takes a cut and the side plate severs it and makes a chip, according to the "bite" the depth gauge allows.

Are you implying Doug was correct in saying the side plate "cuts" down as for as he was indicating?

How?

Not sure I want muh cutters playing a left n right tug o war......

Maybe it is a hi tech chip mulching action that turns chips to dust?

LOL

....no offense intended

I often dig or shave in with the side of the chain when cleaning out a face. Especially with square which works well for it. IIRC in the beginning of the video he shows the cutter profile straight on and the side cutter is exposed outside of the raker.