With the right ball material static bearings feel very good, but neither of the two I had felt right. The static bearings combined with the LCOT ball have excellent smoothness, while getting the extra precision from the lower pointer speed. Here are a few more photos of the finished version 3 mod.

poo - The US Sun The foods that change the colour of your poo - The US Sun

The problem is the high static friction and the variation at different roll angles. Upgrading the ball You might be able to see that even after polishing, the pool ball isn't quite as glossy as the LCOT ball.The point is to think about why you need the tools and choose accordingly. Then Choose Your Sharpening Stones That was low enough to be worth a try! Once my BTUs arrived, I printed a couple of test pieces to roll a ball in. There's a reason we don't use scalpels for gralloching and other 'real world' jobs .. they simply wouldn't hold their edge long enough under those conditions of usage to be of any real benefit. Though this trend may seem like a shitty idea, artists have a legacy of using human and animal waste as an alternative to more traditional techniques. Allow me to “stool” you (ha) on some poop-related art history. Piero Manzoni, a contemporary artist known for his work with turds, canned his own fecal matter and christened the final product “artist’s shit” during the 1960s. In the 1990s, Chris Olili made various paintings from elephant dung. And in recent years, artists in the California Bay area entitled an entire gallery show, “I Poop You” (the theme of the exhibition doesn’t need to be further explained).

Bolpol - Blue Buffing Compound bar/Honing Paste bar - Smurf

Ideally this would be OpenSCAD, but the render time was far too long after importing the Ploopy STL file. but I'd still recommend polishing the pool ball or using a replacement ball as it makes them a lot smoother. The stone looks smaller than it is. It’s pretty much exactly half the length of a typical bench stone. This surprises many people. Admittedly, it’s also narrower and thinner which is, I think, what gives the impression of it having less effective surface area than it actually does. Lastly, the stone comes with a nice leather slip case. The author’s well-used DC4. Photo: Paul Kirtley As we’ve seen above with the DC4, an effective travel stone for belt knives is half the length of a full-sized bench stone. We’ve also seen from the Gränsfors axe stone that a smaller stone which can be held in the hand and applied to an axe is a very effective solution. There are other factors that affect the feel, but I think these are the main three when it comes to the bearings.

These are the travel stone options I have in my kit drawer for sharpening the main cutting tools I might use on a journey. As mentioned above for trips where an axe is very important, I take a file for remedying any chips. For tools such as spoon knives and crooked knives, I might consider more specialist, shaped sharpening stones. These I will cover in a future article. I Poop You,” an exhibit dedicated to and made from poop, opened in 2013. The one-night show was housed in the Mission district of San Francisco. Work included t-shirts and women’s underthings emblazoned with poo piles, nameplates for toilet-paper rolls, and a feculent rendering of Che Guevara. (Hint for lovers - Gift Idea! Valentine’s Day is coming up!) Even a full-sized combination stone, which would provide a couple of different grades at least, is going to be too heavy for most self-propelled trips. The smaller Fällkniven DC3 is made of the same materials (and comes with a smaller leather slip case). I find it too small for effective day-to-day sharpening for my main belt knife. Of course it could be employed in an emergency. Out of choice, though, I carry the DC4. If, however, I’m carrying only a folding knife then the DC3 is the stone I consider first. The DC3 is smaller and lighter than the DC4 – an option for when weight/space is at a premium but you still the ability to sharpen. Photo: Paul Kirtley. Hi Paul! You comment on using the Gränsfors Ceramic grinding stone in combination with Fällkniven’s DC4 sharpener:

Smurf Poo - bolpol Original Soft Blue honing Paste for Knife Smurf Poo - bolpol Original Soft Blue honing Paste for Knife

If you want to try it, rub some jewellers rouge onto newspaper and strop on that for about 3 hours, then finish with about 20 wipes each side on plain paper, having started with a VERY thinly edged blade of VERY high quality, finely grained and really well heat treated steel. Very important is understand the type of steel we have at hand because not of all can keep a very finest sharpening grit. Gränsfors Bruk who have for many years produced these stones from natural materials, now produce a synthetic version of the stone too. I use the original version, which is made of natural stone from Gotland. I’ve owned and used it for many years and it will probably outlast me. Gransfors Bruks Original Axestone and protective case. Photo: Paul Kirtley This is the combination I prefer. There are two stones made by Fällkniven which deliver this combination very well the diminutive DC3 and somewhat larger DC4. Fällkniven DC4 (left) and DC3 (right) diamond ceramic whetstones. Photo: Paul KirtleySo to help with that, I'll be rating each setup I've tested on all three scales. I'll use this three-axis graph to show how well each bearing setup does for each parameter. Original roller bearings It's a little more complicated to use, but it allowed me to embed a spreadsheet to define various sizes and angles. It needs a second PR to tweak the print recommendations and add some of the fancy photos I've included in this article,

stropping paste - Leatherwork Conversation - Leatherworker.net stropping paste - Leatherwork Conversation - Leatherworker.net

Once you know which tools you need to take, how many of each tool will be carried by your group and how frequently they will be used and, therefore, how often they’ll need to be sharpened, you can choose the sharpening stones you need to complement them. Note that they will need some cutting/filing to fit properly. Bearing well adapters for silicon nitride bearings.This shows that reducing the coefficient of friction and the weight both help the roller bearings feel better, When we are at home, in a cabin or a fixed camp, we can use full-sized bench stones to sharpen our cutting tools. This suggests the DC4 diamond side is not the most aggressive, but instead it’d be the entire Gränsfors grinding stone first, then DC4 diamond & last its ceramic side. The finer side of these stones are soft and prone to damage of the surface as well as the corners being chipped off. You, therefore, also need to provide some sort of protective case. A small food storage box works well. We’ve also found surplus US military decontamination kit containers (as shown in the photo above) are the perfect size to house one of these stones. Keep Your Sharpening Stone Options Open