Caliper Pin – New Knifemaking Tool

When grinding blades, it is important to have the ridges, fullers, and similar as symmetrical as possible, especially before quench. An asymmetrical blade has a much higher probability of warping or bending in the quench.

On an unhardened blade, one can scribe markings with a scribing needle and/or compass, but once the blade is hardened, that is no longer possible. And I still want my blades to be at least mostly, even though not perfectly, symmetrical too.

I used to measure the symmetry with a help of a folded piece of paper that I have cut with shears so that it has two perfectly aligned points. When folded over the blade, I could easily-ish check if the points align on the ridge on both sides and thus check where I shall grind more during the polishing to keep the symmetry.

But the pieces of paper get wet and manky in the process, and I kept of course losing them so I had to make new ones over and over every day and sometimes several times a day. And today I finally got an idea how to replace them with something much better and hopefully permanent. I took one wooden clothespin and I ground it in about 5 minutes to sort of mini-calipers that can be clipped onto a blade

© Charly, all rights reserved. Click for full size.

This pin is made from softwood so I could not make the point too refined, but I do not need to. I want to make my blades mostly symmetrical, not perfectly symmetrical. And anyhoo, I shall, in the future, probably make a better and more precise one out of brass, this is just a proof of concept.

And it works well, here you can see it in use. It shows that the ridges on both sides are within few tenths of a mm apart, and that is good enuff for me, that is a difference that cannot be seen with the naked eye and is not easy to measure even with calipers.

© Charly, all rights reserved. Click for full size.

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Sunflower Residence – Earwig

Earwigs are not normally associated with flowers, but they can occasionally hide in the flower buds if they provide enough dark end enclosed space to hide in. This one did not manage to completely hide because this bud is healthy and still well enclosed with leaves. Some other flower buds were badly damaged by slugs – hollowed out in the middle – and those were positively filled with earwigs to the brim.

I do not know why many people fear earwigs, they are completely harmless and very shy animals. When disturbed, their only worry is to scamper off somewhere secluded and dark as soon as possible. They do not climb into ears to eat our brains, but they do eat mites and aphids, so they are an asset in the garden.

© Charly, all rights reserved. Click for full size.

© Charly, all rights reserved. Click for full size.

Look Who Was Hiding in my Fireclay Bricks

Today was a blade quenching day because according to the weather forecast, it might have been the only sunny day in a while. Luckily, I have managed to finish a batch of 8 blades to a sufficient state for hardening so I set out to do it first thing in the morning. And when I was taking fireclay bricks – not for fireplace, just to hold the quenching oil receptacle upright and steady – this fellow was hiding from yesterdays deluge in a crack. It got lucky I did not squish it flat when taking the bricks.

When I put it in the sun, it has spread its wings, soaked in some warmth, and buggered off pronto so I only managed to snap one picture with my phone. But it came out quite well, I think.

© Charly, all rights reserved. Click for full size.

It is small tortoiseshell Aglais urticae. These beauties justify the existence of stinging nettles.

Sunflower Residence – Grasshopper

There is plenty of grasshoppers around, and technically they are a pest. However, unlike slugs, I have never noticed them do any noticeable damage on crops, local species seem to prefer grass over anything else.

This individual is the only one that I have seen sitting – just sitting, not munching – on one of the sunflower plants. And it stayed long enough in one place to get shots from different angles.

© Charly, all rights reserved. Click for full size.

© Charly, all rights reserved. Click for full size.

© Charly, all rights reserved. Click for full size.

Sunflower Residence – Itty Bitty Spiders

I was not trying to photograph this one. I did not even see it – I was aiming for a grasshopper. But the camera autofocused on this tiny spider who seems to have caught an even tinier insect.

© Charly, all rights reserved. Click for full size.

There was a beautiful, big facehugger, bright yellow like a bead. But it was raining and the next day I could not find it. I only found this tiny one, hiding behind one of the petals.

© Charly, all rights reserved. Click for full size.

Sunflower Residence – Bush Cricket

I have planted several sunflowers this year. Slugs did a number on them, but they did manage to blossom at least somewhat. And there are some pretty critters showing along so there will be a series of pictures in the next few days.

Today this beautiful female great green bush cricket. I was afraid of these when I was a wee little kid.

© Charly, all rights reserved. Click for full size.

© Charly, all rights reserved. Click for full size.

© Charly, all rights reserved. Click for full size.

Fry Day 13-th

I was born on Friday 13th, 45 years ago. This Friday, to be precise. When I learned that it is supposed to be a “bad luck” day, I thought to myself “that makes sense, considering…”.

I am not superstitious, but whenever I reflect on my life so far, I do think the same still, although in some respects I am among the lucky ones. But depression does not lend itself to dispassionate analysis.

Anyhoo, this year the world burns, again, and it keeps getting worse. Hooray.

TERFs Failing to Posthumously Claim Pratchett as Their Own

If I were on Twitter (which I am not) and if I were keeping up with what flavor of nonsense TERFs are currently peddling (which I am not) I would probably notice that they are trying to claim late Terry Pratchett as a transphobe.

And if I were making YouTube videos (which I am not) I would make one just like Shaun did (and I did not).

Whenever I think about trans issues and Terry Pratchett, the Monstrous Regiment immediately springs to mind. I did not like that book after the first reading, which was rare for Discworld books – I liked most of them straightaway. But it grew on me with subsequent reading and like most Discworld books I ended up reading it multiple times and I probably will read it some more before I finally die.

We cannot know what a dead person would say about some issue. Even a word from their living friends and relatives might not be entirely reliable, since friends and family could tend to be overly favorable when judging their loved ones who passed on (although when multiple people say the same, it does bear significant weight). Throughout the books, many things about Pratchett become apparent, among them his deep humanism and knowledge of the intricacies and complications of the human condition. There is absolutely no doubt that he would reject any notion of trying to shoehorn people into neat little boxes with simple definitions. All of his books stay and fall on the only “simple” fact about humans – that each is their own person and categories and words are mere imperfect crutches that we use for communication, always imperfectly.

Kyoot Kestrels

Yesterday evening when watering my citruses in the greenhouse, I heard the typical cry from a nearby oak tree and when I looked there, I saw these two cuties sitting atop of it. They were kind enough to wait for me to go inside and fetch the camera, but not long enough for me to get the exposition settings right for the crappy lighting – I only got one shot and they whooshed.

© Charly, all rights reserved. Click for full size.

In case you are wondering, the tree is living, but it was struck by a lightning a few years ago and it has one dead branch on the very top and a strip of deadwood down to the earth since then. Right next to it is an ash tree with a dead branch on which I have photographed kites a few times.

Raptors like to sit on dead branches, I guess they provide them with a good view.

Slavic Saturday

Today again a little crossover with the Behind the Iron Curtain series.

Jan Hus and Jan Žižka are to this day considered great figures of Czech history. Even the communist regime venerated these two men to a great degree, so much so that it was during this regime that one of the largest bronze equestrian statues in the world was made to commemorate Jan Žižka in 1950. And movies were made about both. Today, we also have a national holiday on the day Jan Hus was burned at the stake.

We were taught in school that Jan Hus was a great reformer who has challenged and criticized the corruption within the catholic church, and that was true. We were taught that he has sparked a national movement that has fought against the hegemony of said corrupt, hypocritical, and oppressive church, and that was also true. However what was ignored was that he also sparked a fanatical religious movement that was not solely inspired by a desire for a better and juster society, but also by a merely different interpretation of holy writ.

As for Žižka, he was and is considered to be one of the greatest Czech warriors there was, and perhaps in history, as this short video suggests.

We were taught about his military successes, especially about the fact that he was able to take a bunch of peasants and merchants and convert them into a fighting force capable of defeating several crusades consisting of professional soldiers who trained in combat from childhood. What we were not taught was that he also burned at stake several dozen of “heretics” who took reinterpreting the scripture way too far for his liking.

To this day there is a lot of people who romanticize Jan Hus, Jan Žižka, and the whole Hussite movement. Perhaps there is some value in that. But I think it is also important to remember that whilst they were somewhat progressive in their times, today they would probably both be considered insufferable religious fanatics. They certainly would not approve of today’s Czech atheism.

Mirror, Mirror…

I have finished the two fullered blades that I intended to mirror-polish for research purposes. It went reasonably well, I must say. The new jig helped a lot to smooth out and polish the fullers and although I had to resort on occasion to my old method of wrapping the abrasive around a bottle cork or popsicle stick, my fingers were spared or the worst of the worst. They are not perfect, but they are good enough for it to take some time to spot the irregularities and imperfections.

I think that next time I will do even a bit better because I did not have the jigs from the start for these, I have developed and tinkered with them during this project. One such tinkering that I forgot to mention in my previous post was to coat the idler wheels on my belt grinder with PVC flooring offcuts. That has reduced the chatter when grinding and polishing the fullers on the belt grinder, so I could actually use the belt grinder for polishing, and the handmade jig was subsequently only used to remove the perpendicular scratches and replace them with longitudinal ones. And because next time I will have all this equipment and the knowledge already, the results should, at least in theory, be better and with less work.

So here are some pictures containing the main things that I am writing about – blades, flowers, and insects.

© Charly, all rights reserved. Click for full size.

© Charly, all rights reserved. Click for full size.

The pumpkins are flowering nicely and there seem to be enough solitary bees around to pollinate them.

The blade on the left is the one that I have almost tossed. The fullers align well near the hand, but they diverge towards the tip quite noticeably, at least a few mm. Both fullers on both blades are a bit irregular.

I have a love-hate relationship with mirror-polished blades. They are very difficult to make, it is a lot of hard manual work that busts fingers and back so I hate doing it because I am tired and I do not recover as well as I should from physical exertion. But I also like doing it because it is very rewarding and satisfying to see the gradual change with each step as one progresses from 40 to 7000 grit and then to the buffing compound.

But they are never truly finished because the mirror polish exacerbates every minute irregularity to an absurdly high degree. A few microns deep divot will be seen at a certain angle. Also one thinks all scratches are removed and then, a few days later, you look at it at a very specific angle in a very specific light and suddenly you see that some gossamer-thin scratches are still there.

Then there is the practical side of course – although the steel is hardened, at mirror polish you can literally scratch it if you cut cardboard or office paper with it. They are very precious flowers indeed – basically, the wind blows a speck of dirt on the blade, you wipe it off and it leaves behind a scratch that will be visible in some light. That was one of the main reasons why I have decided to make a tumbled finish for my friends’ knife and why I am going to use it for most of my knives because that hides all but the most egregious scratches.

All in all, although these two blades are not perfect to a degree that I would be perfectly content with them, they are good enough that I shall go on and finish them with high-end fittings.