Shoulder thickness under value to set 15 dps

[drebs]

When taking say knife down to 15 dps what thickness behind the edge do you have to be under to not be griding shoulders down forever and wearing your congress stones on the edge pro.

I just recently started thinning my edges on a 2x42 but the ceramic belts I have wear fast and was just wondering when I have the calipers out what is the approx min to get 13-15 dps having the shoulders low enough that when setting the edge your not grinding the shoulders for ever.

I hope that makes sense and I'm not being bliss about something here

 

[bucketstove]

I read on the internet full sized felling axes are only 15-18 dps , so set the edge bevel at 10dps, then you can sharpen fairly quickly at 15dps I also read me2

You've asked the $64000 question. I have a large chopper that I reground to a very thin edge, maybe 0.015" behind the edge, with a 17ish degree bevel. No damage to the grind despite doing some rough work: root cutting, kindling splitting/chopping, digging, etc. The steel is very tough, so that helps, but it's a little ridiculous to see folders with edges and edge angles considerably larger than I run on a large (12" blade, 2.5" wide, 3/32" thick) chopping blade that sees rough use. BTW, my opinion may be skewed. My current EDC has a 0.015" thick edge at the top of the sharpened bevel, but the bevel is 8 degrees per side.

I have a folding knife that is ~1/32" thick ( 0.03125") and ~35dps ... and yes, it is totally ridiculous

 

[REK Knives]

When taking say knife down to 15 dps what thickness behind the edge do you have to be under to not be griding shoulders down forever and wearing your congress stones on the edge pro.

I just recently started thinning my edges on a 2x42 but the ceramic belts I have wear fast and was just wondering when I have the calipers out what is the approx min to get 13-15 dps having the shoulders low enough that when setting the edge your not grinding the shoulders for ever.

I hope that makes sense and I'm not being bliss about something here

Although it would help more if I knew the stock thickness, grind type, and grind height, typically you want to keep it around .010" thick at the shoulders of the edge (i.e. the transition point between the primary and secondary bevels). Read this for more info...

 

[Fred.Rowe]

This is the reason to purchase or build knives that are taken to a zero edge. This will offset most geometry issues.

 

[me2]

Thread subscribed, since I was quoted and all.

I'm not really sire what the question is. Do you want to know the edge thickness before sharpening g to get a certain thickness behind the edge after sharpening, for a given angle?