Thread: DMT confusion causing much pain!

Here go to the source and quit reading Amazon and Ebay they don't know squat

Knife Sharpening Products | DMT® - Diamond Machining Technology


The slotted DMT's are not popular with SR users as we use the Continuous (Dia-Sharp) for much much more than just Lapping..

D8C aka on SRP "DMT 325" is the most used hone on my bench

Originally Posted by bluroot

What makes my brain hurt is that when I google under DMT D8C, Amazon shows what appears to be the dimensions of a Norton waterstone. DMT D8C 8-Inch Dia-Sharp Continuous Diamond Coarse - Amazon.com It resembles a waterstone in thickness, and is billed as (and appears to be) a "continuous diamond" surface, but unlike any waterstone it can be used dry.

Alright, based on the above, you're looking at picture (a bad one) on Amazon and thinking that the DMT D8C is as thick as a Norton. No!!! The image you're looking at has the bottom right corner cut off and the whole top surface is underexposed. Between the two it's an optical illusion of thickness. Look at the bottom left corner and the light part is the edge, and the thickness. Here's the image.

What was said in your other thread is still applicable. http://straightrazorpalace.com/hones...aterstone.html

Regards,

Howard

So is the right product black with a continuous surface, or is it white and full of blue holes? I must ask because the photo which you copied depicts an Amozon listing under product title D8C, while multiple other sites depict an object with blue holes (so I guess that's what they are), but only for product title DMT 325. I really hate to be a pia, but some of the vendors should not be licensed to carry DMT products if they really are that innacurate in their descriptions. Which, between the (so depicted) black product and the blue product are not described equally (never saw the words
"contiguous" nor "whetstone" associated with the blue producr).

Are you saying that you are sure the Amazon photo should depict a white surface with blue holes? This would be so much easier if the word "lapping" was in the product title, or at least the description!

Originally Posted by SirStropalot

Alright, based on the above, you're looking at picture (a bad one) on Amazon and thinking that the DMT D8C is as thick as a Norton. No!!! The image you're looking at has the bottom right corner cut off and the whole top surface is underexposed. Between the two it's an optical illusion of thickness. Look at the bottom left corner and the light part is the edge, and the thickness. Here's the image.

What was said in your other thread is still applicable. http://straightrazorpalace.com/hones...aterstone.html

Regards,

Howard

I do see what you mean from looking again through the Amazon zoom system - D8C is definitely flatter than I had thought, but it is also definitely black and without surface holes. I'm sorry that I posted an inaccurate statement, but the thickness of a black-surfaced product which cannot be the same as the blue-dotted one is beside the point of my question anyway. Somebody here said that the DMT D8C = DMT 325, which I took to mean they are the same product. But a duck does not look like a rabbit, and if you google "DMT 325" you will see the blue dotted (or are they holes?) product - therefore, it only appears that "DMT D8C" and "DMT 325" reference two different products. Can somebody please explain this, and whether it's the black or the blue DMT which is endorsed for lapping a Norton? I DID go to the company site before posting this, which I found difficult to navigate. I could not find there a photo or reference to either of these products, which may have been due to categorization issues (they don't have to know that we use their products for purposes other than knives or industrial tools).

Originally Posted by SirStropalot

Alright, based on the above, you're looking at picture (a bad one) on Amazon and thinking that the DMT D8C is as thick as a Norton. No!!! The image you're looking at has the bottom right corner cut off and the whole top surface is underexposed. Between the two it's an optical illusion of thickness. Look at the bottom left corner and the light part is the edge, and the thickness. Here's the image.

What was said in your other thread is still applicable. http://straightrazorpalace.com/hones...aterstone.html

Regards,

Howard

DMT is just from the company name Diamond Machining Technology.

325 is for 325 grit, the size of diamonds on that hone, so you will find many different products if you search for "DMT 325".

DO NOT buy the one with the Holes it will NOT work well for razors..

Buy the D8C Dia-Sharp that is what we are talking about when we say DMT 325 here on SRP...


D8C Continous Grit Dia-Sharp 325 grit


The one with the holes the "Diamond Whetstone" or the Duo-Sharp might very well work ok for Lapping, I honestly don't know, I have used it once at a meet and it seemed fine, but you would not be able to use it directly on the razors like we sometimes do with the Dia-Sharp for heavy restoration work...


There are two lapping plates that we recommend highly on SRP, because they are well proved for what we do

1. The DMT D8C
2. The Atoma 400

Originally Posted by gssixgun

DO NOT buy the one with the Holes it will NOT work well for razors..

Buy the D8C Dia-Sharp that is what we are talking about when we say DMT 325 here on SRP...


D8C Continous Grit Dia-Sharp 325 grit

Not for lapping a Norton hone, either? That was my question for now.

It is good to know that information (didn't think they don't look right for razors), because a lot of people have been saying they wished they had bought DMTs for honing instead of their Nortons. Not sure whether such comments were in the context of a knife group which I had stumbled into. Well, I know you don't use a 325 unless you're trying to bevel out some nasty chips! So a side question is wether DMT makes any hones which can displace the Norton 4K/8K?

Originally Posted by SirStropalot

Above, Bold!!

Thanks!

Again, I stated it inaccurately (it's silver, not black)! But I hope I'm not wrong in saying it isn't blue, and that DMT does make another product rated 325 which is blue.

IME DMT's cut very deep, in comparison to equivilent grit Waterstones, SR's you need sharp and smooth everything else you just need sharp..

Those deep cuts from the diamonds tend to lead to Fragile Chippy edges on Straight Razors ie: I personally would never go over the 325 for restoration work on a Razor, using a 600 or a 1200 for bevel setting honestly makes me think of fingernails on a chalkboard The thought of shaving off a DMT D8EE 8000 regardless of pastes used makes my face hurt thinking about it...

That is my opinion, as we say here often YMMV

Originally Posted by gssixgun

IME DMT's cut very deep, in comparison to equivilent grit Waterstones, SR's you need sharp and smooth everything else you just need sharp..

Those deep cuts from the diamonds tend to lead to Fragile Chippy edges on Straight Razors ie: I personally would never go over the 325 for restoration work on a Razor, using a 600 or a 1200 for bevel setting honestly makes me think of fingernails on a chalkboard The thought of shaving off a DMT D8EE 8000 regardless of pastes used makes my face hurt thinking about it...

That is my opinion, as we say here often YMMV

Agreed, The DMT D8EE I have is EXCELLENT for knives. In fact, the knife needs to be sharp enough to shave arm hair before you even put the edge on this plate. But, I would never shave off of this plate or incorporate it as part of a progression for razors. The principles used to sharpen most tools are similar yet completely different than the ones needed to properly hone razors. But, I must say that as I have got much better at honing my razors when its time to sharpen a knife I seem to know instinctively a lot more about how to quickly restore its edge and how to do so more efficiently.