Tag Archive | Saw

Simple Green is super mean (in a good way)

Simple GreenWhen I think of green products, especially a green cleaner, I think of something that is nice to the environment and nice to dirt. I imagine a product that tries harder to make me feel better about using it than it does about getting the job done. Now, I am not in a hurry to damage the earth, but if I have to choose, I often lean to the more manly and more toxic.

One of my favorite toxic substances is lye. It is mean, and if you want something to melt any organic substance you can think of, lye is it. Lye is the main ingredient in Drano drain cleaner, and it removes clogs by dissolving the most common culprit – hair. I also know that it burns skin and while I use it to darken cherry, if left on too long and too strong it will actually dissolve the wood.

Now that got me thinking. I have used oven cleaner in the past to clean saw blades; it did a good job dissolving the wood stuck to the blades and it burns my skin. With those two things in common, there just might be lye in the oven cleaner. It doesn’t really matter what is in the oven cleaner, but it started to make a stronger connection in my head between lye and using it as a cleaner to remove wood and wood pitch that gets stuck to every high-speed tool in the shop.

I got very excited and very sidetracked and started using lye to clean everything, and it worked great. The most impressive use of the lye was on belts from my wide-belt sander. At $40 a pop the sanding belts are hard to part with, especially when I know the only thing wrong with them is that they are full of pitch. In the past, I had used the rubber sticks that are specifically built to clean sanding belts and there were always spots that wouldn’t come clean, but not with the lye. In just a matter of minutes, even the nastiest chunks of burnished and burnt wood streaks melted away and left me with a like-new belt. Luckily, the sanding belt itself seemed rather impervious to the lye.

I couldn’t believe it. There was only one thing left to do – go to YouTube and see if anyone else knew about this dramatic new finding. I didn’t find anything for cleaning big belts, only ideas for smaller belts and none of them mentioned lye. I couldn’t believe that no one had come up with this yet. Lye was the ticket. But as I soon found out, it wasn’t the Holy Grail.

The more I searched the internet to see what others were saying about lye, the more I came across what I assumed were the granola’s of the earth pushing Simple Green to clean saw blades. I thought sure, if you want your saw blades cleaned sometime this year then go ahead. Then I read a few more posts about the virtues of Simple Green and eventually I couldn’t ignore it, so I tried it.

Simple Green worked great on my saw blades. They cleaned up as quickly as they would have with lye or oven cleaner – WHAT? I truly couldn’t believe it. No way on God’s Simple Green earth was it going to beat the muscle-bound, knee-busting power of my good friend lye. There was only one way to find out, so I put them in a head-to-head test on a belt of wood-clogged sandpaper from my wide-belt sander.

I am sure you can tell from the title that Simple Green had more than a good showing. Simple Green worked just as well as lye – absolutely no difference. If a spot needed to soak a bit with lye, it needed to soak the same amount with Simple Green, with the added benefit of not melting everything it touches. I don’t know what is in that stuff, but it works.

Lately, I have even been using it in my drip system on my sawmill. In the past (when my sawmill was outside) I would resort to using diesel to keep the blades clean on pitchy wood, like pine. It worked, but at the end of the day everything felt extra dirty and smelled like diesel, which is the exact opposite of how it should smell when cutting fresh wood, especially pine. Just a little Simple Green added to the water in my drip system keeps the blade clean and the shop smelling fresh. It really is amazing how well it works.

Simple Green, who knew?

Woodworking With Gloves: Am I Crazy?

Before you answer that question, let’s discuss.

This photo was in a recent newsletter from Fine Woodworking. Notice the gloves?

Everything I read regarding safety in the shop says don’t wear gloves when operating machinery. Gloves can get caught in moving parts and suck you in. It makes sense. Don’t wear loose clothing, tie back your hair and don’t wear gloves. But, I am not one to just let things go unquestioned. Are gloves in the shop really that dangerous?

These are the gloves that I currently wear from Home Depot.

I almost always wear gloves in the shop, even while operating machinery. They are tight-fitting cloth gloves with nitrile-dipped palms from Home Depot. I like them because they are inexpensive, fit great, aren’t too hot, and give me excellent grip. I especially like to wear them when I am using the jointer, but I find the grip to be helpful any time that I am pushing smooth-planed wood through a tool like the table saw.

I use the jointer (mine is 12″ wide) to flatten the wide face of all of my lumber before it goes through the thickness planer, leaving it flat and straight. On wider, longer and heavier boards it takes a lot of force to move them across the jointer. Often, I am really leaning into it and the gloves are the only way that I can get enough grip. I know push blocks are recommended, but they are slow and very cumbersome to use when you are faced with several days of jointing rough lumber.

On the table saw and router table, the enemy is smooth wood. I constantly envision myself losing my grip and pushing my hand right into the action. Guards, of course, would help, but we all know that there isn’t one on my table saw and there probably isn’t one on yours either. On the router table it is easier to cover the cutter and be productive, but I still want a good grip, so that I don’t jam my hand into the bit. I think gloves are the answer.

So, why are gloves dangerous? They are dangerous because if you accidentally touch that table saw blade, instead of just getting cut, you will get cut, sucked in, and cut some more. To that, I say, “Well, don’t touch the blade.” I have been doing this a long time and I still get a little nervous when my hand is getting in the vicinity of the blade. I pay attention, think about what could go wrong and try to avoid it. I always picture myself at my college bakery job at 3 a.m. making donuts. I am tired, the floor is covered with grease, my knees are locked and I am leaning forward over a boiling vat of death. But, no matter how tired I was, I knew that if I lost my balance and fell forward, I was going to catch myself on the side of the fryer and not in the bottom of the hot oil. The thought of my hand frying like a donut goes a long way to making me focus and so does the idea of sticking my hand in the table saw. Gloves aren’t an issue if you keep your hands out of the saw.

Now that I have tempted fate and thrown it out to the universe, let’s say my hand does go into the proverbial “fryer”. If I am wearing a glove, is my result guaranteed to be worse because of it? I have heard stories from friends of friends and distant acquaintances on the internet about how things were bad because of a glove. But, what about the times that an accident was averted because of gloves? It is certainly possible. Nobody is going to tell a story of how they didn’t put their hand in the saw because they had a firm grip and everything went smoothly. There is no gore there, no tale of doom to pass down from generation to generation.

I would only use these loose-fitting gloves for moving lumber. Not for work around tools.

With this in mind, I tried to be more scientific and find studies about gloves in the workplace. The one that I found to be the most relevant only asked questions of people who were injured on the job and whether they were wearing gloves or not. They really needed to ask glove wearers about specific times when the gloves either made their outcomes better or worse. But again, worse outcomes are going to get more airtime because you can’t identify when things went better or nothing went wrong.

For now, I am still wearing my gloves. They make me feel confident when I am close to the tools, and I think that goes a long way towards safety. In the meantime, I hope to find more scientific data and plan to do some tests by sticking gloves in the tools to see how things go. I just need to find some volunteers.

Let me know your thoughts and if you have any first-hand accounts.

Habit 7 (of highly effective people) – Sharpen your saw

I have spent a lot of time cutting wood at the sawmill and in the shop with bandsaw, chainsaw and circle blades. I have found a sharp blade to be imperative. Probably all of you know this already, so I am preaching to the choir. But I wanted to add a few things that you may not know.

A sharp bandsaw blade will overcome almost all of its other shortcomings. Your blade may not have the proper set, may be tracking to the left or right, or have other issues that will cause crooked or wavy cuts, but once sharpened it will always improve. I can’t tell you how many times I have had a blade that started out strong and cutting perfectly, only to find that the cuts quickly became wavy. I would tell myself that I must have a problem with the saw, maybe with the blade guides, because I haven’t used it that long and it just couldn’t be dull yet. And, though one time I did have a blade guide issue, every other time the blade was just dull. Dull and nothing else. I probably hit a rock and didn’t know it. Here I was, worried about the set of the teeth and it has never been the set. Now, I don’t question it. If the saw isn’t cutting right I put on a newly sharpened blade and all is good.

A sharp circular blade will overcome almost all of its other shortcomings. See a theme yet? Not long ago, I owned a circle mill with a 48″ bottom blade and a 30″ top blade. These big blades are set at a slight angle to the feed of the log so that the trailing side of the blade is out from the cut just a bit. The saw guide on the front would keep the blade in the right place, but only if the saw was sharp. If it wasn’t sharp, the blade would dig in, cut crooked, warm up and cut more crooked until finally it became shaped like a big salad bowl. With a sharp blade the tolerances of the setup were much less critical. As long as it was sharp, and the kerf was still wide enough, it would just cut… and cut… and cut.

A 12-volt electric grinder, like this one from Oregon, quickly and accurately sharpens chainsaws.

A sharp chainsaw blade makes life worth living.There is nothing better than a chainsaw that cuts fast. It makes the job enjoyable and a lot less like work. I sharpen my chainsaw a lot. If it is not throwing out big chips at a fast rate I stop and sharpen. I sharpen my chain on the bar with a hand-held electric grinder until the teeth get so worn they break off. I highly recommend this type of sharpener. It uses your car battery for power and will sharpen a 20″ bar in just a couple of minutes. If you use a chainsaw and don’t have a sharpener like this, get one.

“Give me six hours to chop down a tree and I will spend the first four sharpening the axe.”
Abraham Lincoln–

Why Quartersawn Lumber Is So Stable: The 0-1-2 Rule In Action

So, now because of my earlier post, “Have You Heard About Shrinkage,” you’ve been thinking 0-1-2, 0-1-2, slow, slow, quick, quick (if you’ve ever taken a dance class with your wife you’ll get that one), and you are still a little confused. Most likely you got bored reading about the 0-1-2 rule I wrote about earlier and drifted off, but this is where it all comes together.

Lumber basically comes in three categories of cuts, which refer to the angle of the growth rings in relation to the surface of the lumber; flatsawn, quartersawn, and riftsawn. A board can be any of these three or anywhere between these three, and since the growth rings form a circle, the category can even change within a board. That’s right, wider boards can have centers that are flatsawn while the outer edges are riftsawn and possibly quartersawn. That is why I push for an understanding of the cut of lumber and worry less about the name.

Lumber cuts are determined from the end grain, not necessarily from the process that produced them.

To the right are the three cuts in their most pure form (the three in the top right of the log diagram) and others that are thrown in for fun. The “fun” ones are to show that it doesn’t matter what process was used to get the lumber from the log (flatsawing, quartersawing, etc.) or its orientation in the log, it is the growth ring direction that counts. The growth rings of flatsawn lumber are parallel to the widest surface, while the growth rings of quartersawn lumber are perpendicular to the widest surface. The rings of riftsawn lumber are at a 45 degree angle. Remember, these refer to their purest forms and there are many cuts in between (as demonstrated by the “fun” names like Nifty Rifty Flatsawn).

This illustration shows how little quartersawn lumber shrinks compared to other cuts.

The next illustration shows the 0-1-2 rule in action. The three illustrations are table tops glued up from several pieces of wood. The first one is flatsawn lumber, the second is riftsawn, and the third is quartersawn. The numbers represent proportionally how much each piece will move in a given direction (remember that the length moves 0). In this case it is shown as shrinkage from a low-humidity environment, but it could also be expansion if the piece was stored in a high-humidity environment. Either way, the proportion of movement is the same. To make the proportions mean something, make them into fractions. Across the width, flatsawn lumber moves 2 over 1 when expressed as a fraction or 2/1, which simplifies to 2. Quartersawn moves 1 over 2 or 1/2. If you compare those two numbers (2 to 1/2), flatsawn moves four times as much as quartersawn across the width.

If I didn’t just lose you, then you can see by looking at the numbers and the second illustration that quartersawn lumber has the least amount of movement across the width, while flatsawn has the most. This makes the quartersawn the more stable of the two as far as expansion and contraction goes.

The other advantage to quartersawn lumber is its ability to stay flat. While flatsawn lumber has a propensity to cup, quartersawn lumber does not cup, and the 0-1-2 rule is the reason why. All of the heavy internal forces exerted on quartersawn lumber are in the thickness of the wood and going in only one direction, and they have little effect on the shape of the lumber. Those same forces on a flatsawn board are going across the entire face and in an arched trajectory. When these forces pull hard during shrinkage or push hard during expansion, they cause the lumber to take an arched shape that we call cup.

Quartersawn lumber will stay flat and move the least amount when in service. However, it is not so stable that the wood movement can be ignored in construction. When joining two boards, any movement between them that is not proportionally the same and in the same direction must be addressed by allowing the wood to move. Remember the 0-1-2 rule, and look at the boards you are joining to see if the numbers match. It is as easy as 0-1-2.

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