-
How lap new Norton 4/8
The Norton 4/8K stone arrived today. I have no experience with a quality stone like this. The manual says to lap it with 220 then 400 wet/dry sandpaper on a glass pane. Do I lap it under running water or dry lap it?
This stone is big and it is heavy. I'm impressed!
-
I lapped mine with the norton flattening stone but you can use 400 grit wet and dry on a hard smooth flat surface. I used the glass top of my electric stove. Just use a pencil and draw your grid . Soak the stone and paper and keep it lubricated.
-
All I did to lap my Norton was to rub it against my DMT 325 under running water. I didn't draw a grid. I just went up and down.
-
In the JaNorton thread is a ton of info on Norton waterstones including a Vid on lapping :p
-
I watched your video but I don't have a lapping stone but must fall back on sandpaper and a glass pane. Do I put everything under water to lap, just soak them wet or dry lap?
-
Soak the Norton in water about 10 minutes. Wet the sandpaper front and back and set it on the glass. Mark a grid on the stone, and rub it back and forth on the sandpaper. When the stone starts to stick to the paper, splash some more water on the paper.
For a new stone, start with coarse paper because fine takes a LOT longer. But finish with fine - otherwise the surface of the stone will be flat, but not smooth.
Change the paper every 10 minutes - it won't look worn out, but a new piece will flatten your stone much faster.
-
I know that Norton make an excellent product.... But.... For the money they charge they can lap there new stones! Flat is flat! It's not that I want a Custom flat with one corner up a little!! I just want it flat. It'n not nature it man doing it.
To me it's like there people that will sell you a razor saying...'oh I'm leaving the old soap and hair and bloom on it because I know you're a collector and want all the gunk on it!
Wrong - wash it off atleast. Same with Norton. 'Sell A Flat Hone!'
-
After water soaking, I used 2 pieces of 220 on each side, followed by 2 pieces of 400 grit sandpaper on each side of the new Norton 4/8K stone. The scarf really comes off fast at first and then the stone starts to glide like an air hockey puck. I'll go buy 2 more pieces of 220 and 400 and lap it again. I can see low spots on the stone and some corners that will take quite a bit of lapping to smoothe out.