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Home > Suppliers > Diamond Products > Atoma 3" x 8" Plate 400 Grit
Atoma 3
Atoma 3

Atoma 3" x 8" Plate 400 Grit

Item #: AtomaBIG-400

Average Customer Rating:
(5 out of 5 based on 13 reviews)

Read Reviews | Write a Review
Our Price: $69.95
Atoma diamond plates are renowned for their long life and fast cutting properties. Some use this in progression with the 140 for stone flattening but we don't do this in our office. We flatten exclusively with the 140. This plate is reserved for work as a low grit sharpening plate. When used to sharpen and repair knives, the Atoma suffers none of the headache of soaking water stones or needing to repair stones when they become dished. This makes the Atoma ideal for users on the go or who are looking for a minimalist kit. Measures 210mm x 75mm.

Customer Reviews


13 review(s) WRITE A REVIEW (Reviews are subject to approval)
  Fantastic Stone Flatener, July 19, 2022
Posted By: Matt Jacobs

This diamond plate is exactly what I need to keep my stones flat. I have used it on stones from 400-5000 grit and it worked great on all of them. As always CKTG is fantastic to work with.

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  No Substitute
Posted By: Dr. Matt
1 people found this review helpful

This plate is my most used piece of equipment in my entire sharpening arsenal. I use it on straight razors to set bevels, geometry corrections and chip/gouge removal. I use it for knives to re-establish the edge (raise a burr), I also use it to lap all of my stones prior to every use.

I've been at this at least 10 years and I just ordered my 5th replacement plate. I've tried other brands and just not close.

This plate is the shitte!!!

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Posted By: Ron - verified customer

Fast shipping, Atoma 400, perfect for flattening and
Raising slurry on water stones and my jnats
Awesome lapping plate

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  Atoma 400/1200
Posted By: Paul Delgado - verified customer

Over all, Awesome sharpening products.

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  Love Atoma 400!!
Posted By: Kirk Womack Jr - verified customer

I purchased the Atoma 400 plate to lap my waterstones. It works perfectly, I love it!!

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  Atoma 400
Posted By: Ray Edling - verified customer

The Atoma 400 flattening plate arrived quickly and in perfect condition. Used it first to flatten an old (my grandfather's) water stone. It was soon perfectly flat with a fine, satiny surface. Beautiful.

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  Shapton Glass sharpening stone
Posted By: Jerry - verified customer
1 people found this review helpful

Love the stone, but am most impressed with the service. Once again I placed my order after hours on Friday and it was at my door the following Monday! Awesome.

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  Excellent Lapping Plate
Posted By: Walter - verified customer

Very flat, cuts great, and priced right!

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  Works great for flattening stones and re-profiling knives
Posted By: Ben - verified customer

Already used this to flatten several stones and reprofile a knife that had a broken tip. Takes away metal really quickly! Really happy with this thing so far.

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  Great sharpening product
Posted By: Joon - verified customer

I'm a big fan of this Atoma plate. Had a Diaplate prior that was good, but I like that these have replaceable grit plates so when it wears out, I can replace just the top surface and be ready to roll again.

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  good diamond stone, fast cutter, let's se how it ages
Posted By: remi cura - verified customer
1 people found this review helpful

Plate diamond coverage is very regular, which is good.
Plate is aggressive, but I definitively use something coarser for big repair (diamond 140 grit).
I'm under the impression that it's not perfectly flat, which is OK for this kind of coarse grit.
I'm curious to see how it will age, as I've already worn several DMT diamond plates and I'm looking for something more durable.

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  Very good lapping plate.
Posted By: Jack

I originally bought the 400 grit plate for lapping my Shapton Pro stones but it works very nicely on naturals as well. So far I have used it on my Shapton Pro 1500, a Welsh purple slate and a Scottish Dalmore Blue with great results. These harder stones eat wet/dry sandpaper but the Atoma plate lapped them perfectly flat with minimal effort and less mess than using silicon carbide powder. I plan on buying the full set of Atoma plates, along with a couple of the smaller "slurry stones" to keep all of my stones in the best condition possible.

The level of service from CKTG has been excellent each time I have placed an order: shipping has been very fast, with tracking numbers provided and each order was carefully packed to avoid damage during shipping. This is now the first place I check when I need sharpening supplies.

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  Had to review it...
Posted By: Max S. - verified customer
1 people found this review helpful

I'm sorry to Mark for having to sort through all of my reviews, but I am continually impressed with what I buy from him! I have been using a DMT 120 grit plate, and a shapton glass plate for lapping 5 different brands of water stones, this Atoma 400 was a recent purchase. I went with this atoma for grits 1k and higher, so I can mainly use my shapton plate on glass stones. I found this plates grit rating perfect for stones from 1k-6k. I had no problem with this on one of my 8k stones as well, but it was a bit more coarse than I would have liked. THIS STONE IS GREAT! I recommend it over the DMT for lapping. I also enjoying sharpening with the plate as well, I really like the scratch pattern it leaves. The Atoma is ligher, and a bit longer than the DMT, also the suction effect is greatly reduced. All-round better choice in my opinion. If I did not already have 2x DMT 120s, I would purchase an Atoma 140. This is truly a great plate, nice n light weight. Don't hesitate. I could not be happier! You may want to consider a 600 grit if you already have have a 120 grit DMT plate, you could probably extend up to a 10k stone with the 600 and get a good surface.

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