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Take a moment tomorrow, December 7, to remember the attack on Pearl Harbor. If you were in the Navy and made it to Hawaii, you probably passed by the Arizona monument at Ford Island coming into Pearl Harbor. It's a place you'll never forget. Our Patriot Turners- We've had a bunch of additions to our "What's On Your Lathe" thread this week! @Gerald, @teesquare and @RustyFN all gave us a look at their current projects. The new items start here- @Gerald followed up on the bowl he is working on with this separate post. He has started on the front side with amazing results- Gerald describes what he has done in this post- @DAB posted this lovely bowls in the Monday morning thread- At first I thought it was walnut but I was wrong. Doug followed up with information about the species called Ohia. More images of the bowl and about the species can be read at- @RustyFN added a installment to the "Off The Lathe And Just Finished" thread. A beautiful cherry bowl- Rusty tells us more about the bowl's size and finish in this post- @Masonsailor continues to crank out amazing Christmas presents. This fantastic bowl is just another example of his beautiful work. Paul guides us through the glue up and first stages of turning- What’s Coming Up- Click on the images for links to more information and registration For The Newbies- Adding this from Ron Brown's newsletter to this section as it is good information and often asked by beginning turners- Understanding Lathe Speed One of the most asked questions I get is, “What Speed Is Best?” There is a formula, but my answer after the first 1,000 times settled into the following: “I start slow then speed up until I don’t feel safe. Then I slow the lathe down a little and make shavings.” My first wood lathe was a Jet 1236 that controls the speed with a lever. There were 5 speeds with the slowest being 500 rpm. It didn’t matter what speed I selected because in those days I didn’t have a clue what I was doing and I had a lot more to worry about than how fast the lathe was running. I moved on to Jet 1015 manual speed change, a Delta 46-460 with variable speed, and then to my workhorse, a Powermatic 3520A. I still have it and still rely on it. I also have a Jet 1640 variable speed in my studio shop. When you think of speed, you have to put it in context: 1) Out of round out and out of balance bowl blank 2) Bowl blank but cut to a round disk and centered pretty well 3) Small spindle 4) Large spindle 5) Hollow form, etc. What is important is how fast the material will be moving past the cutting edge of your turning tool. The larger the diameter of your blank, the faster the cutting speed will be at a given RPM. Sorry for the math but let me give you an example: 10” diameter bowl blank at 1,000 rpm. The material is moving past the cutting edge at approximately 30 miles per hour. Dia 16” bowl blank at the same 1,000 rpm is traveling at approximately 47.575 miles per hour. Note: The reason you have to sharpen your quality HSS lathe tools so often is that in 10 minutes of turning at average speeds, your tool has cut around 5 miles of wood! The best advice I can give you is to start on the slow side. Then increase the lathe speed slowly until you don’t feel safe, then slow it down a little and make shavings. I ignore the tachometer most of the time. Formulas can’t take into account, out-of-balance blanks, things that are not exactly on center, different wood densities, or defects in the wood that would change the center of gravity. As you get closer to round the balance will change and you can speed up gradually. I turn as fast as I feel safe unless the tool is burning the wood, making powder instead of shavings, the wood is tearing rather than cutting, or I’m getting catches because I can’t control the tool at this high speed. In short, there is no perfect answer as to speed. In general, the larger the blank the slower you need to start. Spindle work is almost always turned at a higher speed due to the smaller diameter of the workpiece. Delicate finials and small work are usually turned as fast as the lathe will go. Sanding is almost always done much slower than cutting and shaping. Expand Your Horizons- Tim Yoder demonstrates how to turn a Honeycomb Christmas ornament- Looking for turning ideas? Why not check out our own Hollow Forms Gallery! New Turning Items- Nothing new that I've seen. Remember Woodturners Wonders has different items on sale throughout December. https://woodturnerswonders.com/ Everything Else- Safe turning
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