Thread: Norton lapping stone and 4k/8k + Naniwa

So last week I got a Naniwa 12K and a Norton lapping stone (sort of an afterthought purchase, Amazon said other people bought them together frequently and I figured, why not? I had been using sandpaper previously). Here is my post on my experience with using the Norton lapping stone from another thread:
http://straightrazorpalace.com/hones...12k-stone.html

My question is, I noticed crazy swarf buildup on the 4k/8k today. I do the pyramid method of honing, usually not moving on to the 8k until swarf stops forming on the 4k. I had been getting great results honing my favorite wedge this method previously. Today, however, no matter how many passes I did the swarf never quite stopped. Even on the 8k.

The other thing I noticed was one side of the edge got cut abnormally high. My favorite wedge is my favorite because it has a wonderfully thin bevel. After the first 20 or so laps on the 4k, the bevel on one of the sides got insanely high (or thick or whatever you want to call it). The other side remained unchanged.

Do you think either of these things (the ton of swarf or the bevel getting high on one side) was caused by the Norton lapping stone? Could it have done something to the 4k/8k to make it cut faster/harder?

I wish I could answer the question about the Norton lapping stone, but I use a DMT.
I don't allow the swarf to fill/build up on my stones, especially the 4/8. I do 20 laps , then clean/remove the swarf.
I want the cleanest stroke so the stone(not the swarf) can do it's job.

Are you using tape layers and forgetting how many ? My Nortons seemed a little more aggressive when new as I recall and smoothed out later. I lap before every razor. Picked up Glen's, habit but it works well for me too. I don't think lapping is what's going on. Lapping the 12k Nani might leave some deep scratches in it and I used some 320 paper on glass to lap that until the sticker was gone.

OH and don't forget to lap the lapping stone and knock the sharpness off the corners a little :<0)

Originally Posted by Hirlau

I wish I could answer the question about the Norton lapping stone, but I use a DMT.
I don't allow the swarf to fill/build up on my stones, especially the 4/8. I do 20 laps , then clean/remove the swarf.
I want the cleanest stroke so the stone(not the swarf) can do it's job.

There was so much swarf I was cleaning after like 2 or 3 laps. But it never stopped building!

Originally Posted by 10Pups

Are you using tape layers and forgetting how many ? My Nortons seemed a little more aggressive when new as I recall and smoothed out later. I lap before every razor. Picked up Glen's, habit but it works well for me too. I don't think lapping is what's going on. Lapping the 12k Nani might leave some deep scratches in it and I used some 320 paper on glass to lap that until the sticker was gone.

OH and don't forget to lap the lapping stone and knock the sharpness off the corners a little :<0)

I am using tape. 3 layers just like always and it's the same brand. So I'm sure it's not the tape. The 4k/8k is also old, about 2.5 years.

I am just guessing here but if you haven't lapped the Norton in a long time, you have now cleaned it out and it is cutting better. The only thing I can think of about the bevel getting bigger is that you didn't lap the lapping stone and it may have made your hones less than perfect. Did you use the pencil grid when lapping ? Did you chamfer the edges with the lapper?

Pictures might help some when the more experienced honers come along :<0)

Originally Posted by 10Pups

I am just guessing here but if you haven't lapped the Norton in a long time, you have now cleaned it out and it is cutting better. The only thing I can think of about the bevel getting bigger is that you didn't lap the lapping stone and it may have made your hones less than perfect. Did you use the pencil grid when lapping ? Did you chamfer the edges with the lapper?

Pictures might help some when the more experienced honers come along :<0)

It had been a while since the 4k/8k was lapped, probably 2-3 honing sessions ago. I didn't lap the lapping stone or chamfer the edges before I used it. But I did use a pencil grid when lapping the hones.

Originally Posted by supersco

It had been a while since the 4k/8k was lapped, probably 2-3 honing sessions ago. I didn't lap the lapping stone or chamfer the edges before I used it. But I did use a pencil grid when lapping the hones.

The edges maybe your problem but I would lap the lapper , and then knock off those sharp corners and try another razor.

gssixgun Norton 4k 8k Lapping - YouTube

He is using a DMT that does not need to be lapped but the Norton Lapping stone does for sure. Same process only on 120 or 220 or 320 wet dry paper