Ill try to explain the problem, but without going into a lot about the particular turning. 875 to start and up to 1200 to shape etc. Wood Turning tool Carbide Tipped Working Lathe Tools; ... * The straight edge of the cutting edge carries out the chip severing. If you’re still seeing tear out, you can shellac (or CA) the wood and let it dry before making the final cutting passes. When cutting with either a bowl gouge or negative rake scraper, angle the tool cutting edge to reduce force. video as I describe how I like to remove the bowl interior. If that same blade were lowered parallel to the table surface, the paper would probably fold and rip. The shellac will harden the soft, loose fibers and present them better to the sharp bowl gouge. Tear out is not a mystical event whose roots lie in the deep past only understood by some monk high up in a cave on the side of the Matterhorn (and I do mean the one at Disneyland). Start with a sharp bowl gouge. and much slower than that for pieces larger than 12 inches in diameter. Instead, find the trouble area, usually along the end grain, and sand with the grain to remove any tell-tale marks. On the end grain areas, the wedging action pulls on the fibres and if they are weak they can break below the surface and pull out. Tear out can happen in the bottom of a bowl or box when using a scraper. Nothing ventured - nothing gained. I attempted to turn a small test bowl with them, but had tear-out type issues. Tearing usually occurs either where the surface is changing from end grain to side grain as the wood rotates, or where locally disturbed grain opposes the cut. Terms and Conditions Hey Kent, I bought a larger lathe to be able to turn larger than the 5 inch bowls and cups I have turned. I like the smell of the shop when I turn Oak. How was I to know? What’s actually happening is that the … It was only natural that a friend of a friend’s Facebook plea for help with a fallen limb came to my attention. First, don't push the tool too fast. Off to research Negative Rake Scrapers next…. A sharp bowl gouge might seem obvious, but it is the single most significant factor in... 2. To repair it would be to level the surrounding areas with sanding or scraping or hand planing or a combination. Quickly forcing the bowl gouge across the surface will usually result in grain tear out. Artwork and Content Usage, YouTube Channel Rob Johnstone: Wood will “chunk-out” for a number of reasons and maple is one of the worst culprits in this regard. Return a sharp edge to your bowl gouge as frequently as possible. Another great option is to use a round nose scraper and “cut” instead of scrap the surface. I’m Kent, a dad, husband, graphic designer, photographer, artist, traveler, dark chocolate lover and I’m addicted to turning wood bowls! You went the wrong way in relation to the wood grain; Your blade needs sharpening; Your taking too deep of a cut Tear-out beware, Roger is ready for you now!!! This article will cover, in detail, numerous approaches to solving the wood bowl grain tear out problems that might be plaguing you. Perhaps it’s the steeper bevel angle or more bevel surface. RSS Feed Oh. Wood bowl grain tear out can be frustrating. Will use the tips. Acacia wood & resin. I was getting quite intimidated by this much more powerful machine. In general, I never turn faster than 1,000 r.p.m. I've been turning highly figured burls. Cutting “with the grain” is a confusing statement, as I detail in the article about making supported grain cuts. When grain tear out occurs, at first glance, it may appear to be only a few small pock marks in the wood bowl surface. Hey! So critical that I have an article solely devoted to understanding and learning to ride the bowl gouge bevel. It didn’t matter that I’d never worked with this type of wood before, I knew it had to be good. Tear out happens when the grain wants to split, chip, or fracture, due to the wood itself, vibration from the tool, vibration from the balance of the wood, vibration from the lathe or its foundation, or vibration from how far the wood projects from one or two centers. Now, let me share my knowledge with you. The fingernail grind is the bowl gouge grind I prefer for most of my turning purposes. Having watched a few experts making the entire process look effortless. Logs it was. Moving the bowl gouge through the wood fibers is very similar. Try cutting in the opposite direction. The pockmarks are gaps or holes where some end-grain fibers have been ripped out completely. The blade drops down at an angle and makes a clean cut. November 27, 2007, KnowledgeBase: Woodworking Miscellaneous: Woodworking. Incorporating the gentle approach of a steep cutting angle as described above, this bowl gouge finishing technique can produce results that rival beautifully sanded finishes. Also, try turning a bit faster, but not too fast and slow down the pace of your cut. Until all of the grain tear out area is removed with precise cuts, the tear out will remain, and sanding will do very little to remedy the problem. Yes, if those loose ends don’t cooperate, treating them is a great solution. OK maybe 3 things or maybe 4. Take your time and experiment with one or a combination of the above tips to eliminate the tear out on your wood turned bowl. Some are soft and kind of punky. That still makes me shake my head. Watch out as … Learn how to repair tear out with a scraper from a woodturning expert … If you're getting actual tear out, more speed (and very sharp tools) will help. is super fast, but I’m always amazed how I can feel the bowl gouge dipping in and out of tool mark grooves at these “slower” speeds. Charlie, Newtonville, Ontario. This was about the time I decided to join the local turning group. Climb Cutting can make tear-out less like than Conventional Milling. The first thing you want to do is "seal" the end grain since moisture is … Putting over these ideas and techniques is an art, too – congratulations! The … Shear scraping is a bowl gouge technique that feels foreign and odd at first but is incredibly valuable for creating a smooth finish. These tube or fiber ends are known as end-grain. So we bucked the limb down to manageable chunks and loaded it on my trailer. Okay, let’s start with the basics. When I first started turning, I was lucky you might say. Although CA can be used on the whole bowl surface, I find shellac is better for that purpose. Everyone and their brother at the turning group gave me tips and advice on how to lessen the grain tear out. Thanks again Kent. Thanks, Dan! https://www.popularwoodworking.com/techniques/your-guide-to-tear-out I turned some pine and some spruce and was seeing the tear out. I turned and turned, or instead, ripped and ripped that pecan over and over. I’m finding it quite difficult. If it's still a problem you will have to resort to abrasives. My Wood Bowls — Etsy Shop Starting with the new lathe I used the same higher speeds. I’m wondering if you have a video/YouTube that goes into more detail about how to master this skill. Looking back, I’m so glad it worked out that I acquired that beautiful, yet challenging to turn wood first before turning an easier wood. A more gentle and cleaner cut is made, rather than the scraper meeting the bowl surface at a flat 90-degree angle. Plane from the broken end to the pointed end. The branch fell in the night and barely missed the edge of their home. , Check out these other important articles as well:• FINISHING CUT – WOOD BOWL TURNING BEYOND THE BASICS• 5 WORST TENON SHAPE WOOD BOWL• 13 WAYS TO RUIN A WOODTURNED BOWL• 9 STEPS TO SHEAR SCRAPING PERFECTION BOWL GOUGE TECHNIQUE. If the same knife is rapidly pulled through the paper, tears will most likely form. Hello Kent, Want to learn all about finishing cuts? I like the lathe speed to be around 1500 RPM. Shear scraping can cleanly cut the wood bowl end grain while eliminating grain tear out. Think about drawing a sharp knife across a sheet of paper. The logs were stacked in a dry place and sat to wait for their fate. We often cut figured woods when we turn. The worst I have ever had doing one of these bowls. Also, you could relieve the sharp corners with a rasp before routing which can sometimes relive tear out. However a couple of weeks ago I splurged and replaced my “Lada” with a “BMW” and got started with a bowl turning hobby. All the best to you! There is a lot to know about the lathe speed, read this article next that covers this issue. When I worked with the problematic punky pecan I mentioned above, I’d often run into areas that were soft and spongy. This technique is described further in my round nose scraper article, check it out. Wear a respirator - dust from spalted or rotten wood can be dangerous. Check it out. (Furniture Making Forum) Don’t let tearout spoil a perfectly good piece of wood… or your peace of mind. Occasionally, depending on the species and age of the wood bowl blank, wetting the surface can help to raise fibers. I turn vessels green - thin (1/4" or less) and then dry slowly. If you can get the wood for free - try it. Second. It is this end-grain that can rip, snap, or simply break off and that creates grain tear out. The end-grains have been broken, snapped off and jostled around. Goodness. article about making supported grain cuts. I didn’t see the wood as dead and rotting, I saw spalted pecan! Aged, dead, and rotting, the wood still had to be good for something, I thought. tear-out that leaves a rough feel on two sides . However, fine-tuning areas with tool marks or hills and valleys can be accomplished with light focused passes of a sharp negative rack scraper. The turning methods you mentioned are spot on especially the comment about the traditional gouge grind and riding the bevel. If the bowl gouge tip is not supported by the gouge bevel, tool marks and torn grain are sure to form. A couple ways to deal with this is to sharpen your bowl gouge very well during the last few cuts. Let the tool do the cutting. Now, the real test. article specifically about the angles of the bowl gouge bevel. Luckily, nobody said, “turn a different wood.”, Being a newbie, I thought that the rough surface was just because of my inexperience. I mix my own shellac using shellac flakes and denatured alcohol. I have discovered several of your techniques…but just as many were news to me—Which is GREAT!! Question Yorkshire, UK. see my bowl gouge sharpening article for more information. If you force the tool through the wood it will tear out even with a sharp tool. I love wood and woodworking. Your rip a standard 2 x 4 into two turning blanks. Read this article next. Wood Turning 7 Tips STOP end grain tear out wood bowl woodturningYear out can be a huge issue and create all kinds of frustration. However, with that being said, a more traditional standard grind offers better results when confronting problematic end-grain. Supported wood grain. At the time I had no idea, and I guess the fortunate thing was I didn’t know I was lucky. I noticed in the video yesterday that when you started to dig out the inside of the bowl you just confidently presented the tool and off you went. Well, I’ll tell you what, it was pure luck that I turned that pecan first. Experiment with subtly different angles. Thanks for your well written and professional approach. The tear out can occur with very dry, or “punky” (brittle wood fibers) wood. Doesn't acrylic or Polycril change the appearance? Tear out is an indication of 1 of 3 things. The more porous the wood, the more likely it is to splinter. Wetting the wood surface can raise fibers and allow the sharp bowl gouge to make a clean pass. I have my own wood, I’ll bring that and turn it into bowls.So, I did just that. – Be sure you are managing the lathe RPMs correctly. These “straws” run across the surface of the wood bowl blank. Imported. 4"diam. Speed up the lathe if necessary, slow down the tool feed. Nov 29, 2020 - Explore Larryfetterman's board "Wood lathe", followed by 375 people on Pinterest. Wood immediately begins losing water/moisture from the moment you remove it from the living tree, and as it does, it shrinks. A few good router tips are all you need. Tips to reduce Overheating Log after log produced bowl after bowl. I actually bent(twice) my gouge that I bought years ago to accompany my original machine. And if all else fails, try turning a more forgiving wood. Epoxies have their place for larger voids. How can I tell if the wood turning chisels are sharp? I greatly appreciate your kind words! Here is the link to all the details about cutting with a round nose scraper. I’ve done that for many years and I believe that it’s due to the angle of attack, which provides better control and a lesser aggressive cut. Thank you for writing and your kind words! article solely devoted to understanding and learning to ride the bowl gouge bevel. But honestly, the incremental passes is probably your best bet. Even when I cut with a sharp fingernail gouge, I get tear-out. Instagram Instead, we need to shave the wood fibers, much like using a razor. Sanding by combining lathe rotation and detailed with-the-grain sanding (lathe off) is the ideal way to achieve a smooth final finish on your wood bowls. I’m now working exclusively between 250 to 800 rpm. No backing. I will tackle tear-out with renewed confidence now. … CA works great for particular issue areas like knots or bark inclusion areas. There are many ways to address this issue including using sharp tools, cutting with the supported grain, speeding up the lathe, changing angles, and even treating the surface. Sometimes, even with the sharpest tools and the best techniques, you can get torn grain while turning. The resulting bowls can be beautiful if you don’t make yourself crazy in the process of overcoming all the grain tear out issues. * This way, there’s zero or minimal tear-out off the encircling wood. What I was especially excited to read was the wood treatment for punky wood. Sand any trouble areas still remaining with focused attention. 2 things come to mind to try. Acrylic is, after all, plastic. – Check out this video as I describe how I like to remove the bowl interior. Turn A Wood Bowl is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com. I do eventually hope to join a wood turners club in the area at some point but because of the current situation all these activities are suspended. Grain tear out can be discouraging, but with persistence and patience grain tear out can be a thing of the past. From contributor J: Another problem is that the wood I've been turning hasn't been high quality. We are most interested in clean-cut fibers with each pass. Dust Collection, Safety and Plant Operation, Job Opportunities and Woodworking Services, Soaking the piece in a sizing or finish solution can stiffen the material for cleaner turning results. I came across one of your very helpful videos yesterday and will watch more in the coming days. One end of a chipped spot is usually pointed and smooth and the other end is squarer and looks broken. Privacy Policy Here is an article specifically about the angles of the bowl gouge bevel, it’s an important read. I have learned how to sharpen the gouge so I don’t think that is the issue. In hardwoods these catches can be violent and potentially dangerous. To fix and level the surface, clean cuts must be made down to the deepest areas of these voids. The sycamore cut like a bar of soap. Everything you are describing is not abnormal. The depth of each cut is not what is essential when dealing with grain tear out. My new lathe has 3 variable speed ranges. Thank you for your comments regarding end-grain fun.. Please let me know if these help you. At this point, if no other tips are working, try applying a layer of shellac to the whole bowl or just the trouble areas. First off, as described above, the tear out should only appear on one-half of the total end-grain area. Turning up the lathe speed makes it more difficult for the tool to repeat bad behaviors and instead it will start to create new clean cuts. This also happens to the wood fiber ends. I encourage you to learn more about shear scraping by reading this article about perfecting the bowl gouge shear scraping cut. I’m so glad you found this and you’re seeing good results. I also use 5-minute epoxy to glue my blanks to blocks in order to chuck them up. Forum Responses It was a good thing I got that wood when I did. Hi Kent, Hi! I can’t tell you why for sure, but it just works better. How can I avoid grain tear out on a wood bowl and get a good smooth final surface? Do not sand with the lathe on as this will only increase any tool mark hills and valleys. By angling the tool edge, the sheer force of the metal to the wood is reduced, and a cleaner cut occurs. Set of 4. I have an article all about how I sand my wood bowls. The angled cut is especially important when using a negative rake scraper. Thank you, Kevin! Here are a few suggestions: – Read this article about bowl gouge techniques. The fibres are not cut, but torn apart. Ha! It is long and heavy so that you can handle the torque generated by taking bites out of the wood after you have been turning air. Angle and makes a clean pass valleys can be a thing of the bowl! Forcing the bowl gouge technique that feels foreign and odd at first is... Worst I have learned how to lessen the grain by examining the tear out should only appear one-half! 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