1st Waterstone use and some questions (very long)
Christopher Fitch @ Memphis
>Well,
last night I broke out my waterstones to use them for the first time. I have the 2 Norton combination stones, 220/1000 and 4000/8000, that I purchased from the Museum of Woodworking Tools. I also picked up a Nagura stone from there as well, and I bought a waterstone holder from highland, and I bought a big spray bottle for spraying water. I decided to write about my experiences and I have a few questions too.
Prior to this, I have used Scary Sharp with a variety of different sandpapers and I have a Veritas Honing guide. I can get good results with scary sharp, but it has taken some experimenting with abrasives to get some good results. Also, my sharpening skills have improved some and I now have a better understanding of what is needed to get a good edge. Just as a side note, I find that the good ole standby, 3M Imperial W/D paper does pretty good, but it wears out pretty quickly especially on the higher grits. Also, the 3M PSA-backed micron graded paper is good stuff too. I even tried some 3M diamond lapping film (PSA) but I don't recommend it since it just does not seem to cut well and wears out quickly.
Prior to using my stones, I read as much info as I could on them such as Charlesworth's article in FWW and Joel's info on his site, and some other info on Highland Hardware, and a number of posts from here. I picked up a 10x lighted magnifying lens from enco to check out my edges up close.
I picked up a tupperware container that is a nice fit for one stone. I filled it with filtered water and poured a bit of bleach in it and put the 220/1000 in it and closed it up. I did not soak the 4000/8000 because both D. Charlesworth and Joel from TWW mention that stones from 4000 up don't need it (more on this in a bit).
I chose the blade from my Veritas Low Angle block plane as the victim, err I mean, volunteer for the first run. I have been having problems with it recently and it has not been performing like I would expect. I had sharpened it recently but I messed up some by putting a large micro-bevel on it. Upon examination, I found some nicks and I was not sure that the face was entirely flat so I decided to rebuild the edge from scratch.
So I started out by grabbing some 220 W/D sandpaper, my float glass, and a pencil. I slapped the paper down on the glass, sprayed water all over it, marked some lines on the 8000 grit stone, and lapped away. It took a few passes and it was flat. I repeated the process on the other stones, going from high to low. The 4000 seemed to take longer but the rest were quick. After that, I put the 220 in the holder and started flattening the face. I marked the area near the edge and it did not take but a few passes to get things moving. After that I climbed the grits, but I noticed that I was not seeing a very shiny surface right on the edge like I would see using sandpaper. I was concerned, but I put marks on the edge with a marker before moving up stones, and the ink was scraped off each time so I can only assume that it was getting flat.
One important point here. When I got to the 4000 grit stone, I sprayed some water on the surface, but it soaked in immediately and after running the blade over for a few passes, I noticed glazing occuring. I was concerned by this, so I placed the stone in the water and let it sit for a minute or two and then I tried again. This time the stone held the water on the surface but this was contrary to what I had read about 4000+ stones needing to be soaked. Also, when I got to the 8000 stone, I ran the Nagura stone over it, but I was not really seeing a slurry develop.
So after the face was finished, I set up to rebuild the primary bevel. I popped it in my honing guide and started on the 220 stone. It worked quite well for a while, but I noticed that I was having issues getting the entire old edge removed. I rechecked the blade in the guide and noticed it was a bit off square so I reset it. I got better results but I still had a bit of the old microbevel left. So I switched over to my 220 sandpaper and worked a while on that and it seemed to eliminate most of it. I assume that I started having dishing problems. In any case, I ended up with a good flat primary bevel, and I noticed the wire edge on the face.
Then I moved to the 1000 grit. I did not make too many passes here since I was really just trying to get the marks from the 220 removed over most of the bevel. I made a few passes at 4000 & 8000 but only enough to get some shine. I decided not to fully polish the primary bevel since I was going to focus on getting a good micro-bevel this time.
I then reset the guide and moved up 5 degrees. I read on here a few days ago that some people only use the 8000 to make a micro-bevel. In past, I would start on 400 grit sandpaper to make a microbevel working up to 2000 grit and I think that was one of my mistakes before. So I started here on the 4000 grit stone and only made 15 passes and ended up with a small bevel. Then I moved to the 8000 and made 15 more passes. After this, I had a nice bevel. I then moved back to the 4000 and made about 5 passes on the face to remove the wire edge, and then did the same on the 8000 grit stone. I checked it out with the lens and it looked very nice. I was still concerned about the face edge, but even under the lens, it looked dull but it was fine with no nicks or curves.
Of course the only true way to test is to plane some wood, so I mounted the blade, pulled out a piece of cherry, clamped it in the vice, and planed some end grain. I made some adjustments and was able to get some super nice thin continuous shavings from the end of the board. So after all that I can only assume that the sharpening was a success.
Taking stock of things I have a number of observations and questions.
First this stuff can be quite messy! I put a large plastic bag over my benchtop and I ended up with water all over the bag. The 220 stone really cuts nice. The primary bevel looked dull but nice and flat after using it. I can feel how the 4000 and 8000 grit stones cut well. The stone flattening was easy and it did not take long to do it. I was not getting good results from the Nagura stone. I know it's from my ignorance but I was not sure exactly what I should be looking for when rubbing it on the 8000 stone. Also, I saw some people mention that they use the nagura on the 4000. I did not notice any improvement in the nagura stone perfomance after I soaked it.
So here are the questions:
1) I had to soak the 4000/8000 to get it to perform correctly. Is this right? or is this just because I have a 4000/8000 combo stone? The 8000 had suction problems which I expected after having so much water.
2) Should I soak the nagura stone?
3) Should I use the nagura on the 4000?
4) How exactly should I use the nagura? How many passes should I take? What should I be aiming for?
5) Is it ok to soak all stones in the same container? or should I have seperate ones to prevent chances for contamination between grits?
Some final observations:
1) I can see why having seperate stones would be nice though it becomes more meaningful for 4000 and 8000 to be seperate from each other as well as being seperate from the 1000. The 220/1000 is fine because in practice I probably won't use the 220 that much.
2) Making a special tray or container would really help in controlling the water and provide a good work surface.
3) I like my Veritas honing guide but I don't get good results from the angle jig for the guide. I have real trouble getting the blade square in the guide. I may make a jig that is based on edge distance from the front of the guide and have a reference piece that sits above the blade height to provide a square reference face.
Well that's the end of this long post...
:)