Thread: Lapping

Hi, i have a question ,as usual
I use a DMT 325 plate for lapping my Shaptons and Jnat.
After using the DMT plate there are fine scratches on my stones that i take out with a Nagura.
What is a good DMT plate for use instead of the Nagura.
Something finer than the 325. Is it a 1200 DMT.
I've started to realise that i need to lap more ofter. Im always honing in my spare time nower days.
Cheers ..

I have used both a 600 and 1200 diamond plates with good results. Once flat or reasonably so, I do not believe you need the aggressiveness of the 325 to slurry or deglaze.

Sometimes DMT 325s have high diamonds that need knocking down to stop them from scratching the honing stones. Just search the forum under "DMT 325 scratching" and you should find the cure.

Bob

I think its a high spot as opposed to a rogue diamond.
I didnt realise it had created a rough patch in the middle of my Shapton 30k. I could feel it when honing but as im a bit of a novice i was ignorning it.
I did try to sharpen a knife on it but that didnt do anything.
Tonight im gonna try the screwdriver technique.
You live n learn

Sounds like you are headed towards an Atoma 1200 grit plate. Very consistent diamond distribution throughout the surface of the plate. I have two Atomas and never used a screwdriver yet..............

Originally Posted by JOB15

I think its a high spot as opposed to a rogue diamond.
I didnt realise it had created a rough patch in the middle of my Shapton 30k. I could feel it when honing but as im a bit of a novice i was ignorning it.
I did try to sharpen a knife on it but that didnt do anything.
Tonight im gonna try the screwdriver technique.
You live n learn

Yea, it took me a couple of tries to cure my DMT 325 of leaving scratches. Good luck to you.

Bob

Tonight i took a large screw driver, soaked my DMT plate added a bit of washing up liquid to the mix and started dragging the shank of the screw driver up n down the DMT plate.
It worked a treat.
I've re lapped all my Shaptons and my Jnat and there are no scratches.
Thanks alot folks

Check the edges of a new diamond plate with your thumb, lightly bevel the edges with another diamond plate, a silicon carbide stone or a file.

I'd. Uh a 325 and really rinse well using both hands and all fingers then use the nagura