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January 2019

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JANUARY 2019 What’s Inside PREZ SEYZ PAGE 2 DECEMBER DEMO PAGE 4 JANKA HARDNESS PAGE 7 SHOW AND TELL PAGE 9 PEN WOOD OF MONTH PAGE 18 HOW TO FIT LOG BLANK IN SMALL BANDSAW PAGE 22 Pen Guy’s unfinished bowls for the Feed My People Bowl Event. Only got 14 done before illness. PREZ SEYZ 2 Happy New Year! As we begin 2019, let's all express our thanks to all the great demonstrators of this past year. I know that without you all I would not be having all the fun turning that I am. And the new year started off with a bang with a great demo by Bob Eberhardt on bowl saving equipment. Thanks much Bob. As we look forward to 2019, we have several events coming up. 1. "Feed My People " make sure that you get your bowls turned in by the Feb. meeting. And if you can donate that one "Special "item for the silent auction. 2. "National Chainsaw Championship " We will be having a booth again this year so keep Aug. 1-4 open to help out at the booth. We will have more info later. It was brought to my attention that several people have not paid membership dues since 2017, If you are receiving this news letter and are no longer interested in keeping your membership up please contact Randy Patzke at [email protected] and Tom Leonard at tl9597@ charter.net so you can be removed from the mailing list. To all the rest, Dues Are Due !!! We soon will be adding a new midsize lathe to our shop made pos- sible by the awesome memorial gift from the family of Allen Otto. That's all now, stay warm and let the chips fly... Prez Duane JANUARY MEETING HIGHLITES 3 Notes from meeting as best remembered, all officers agreed to another year so all were reelected. We will be exhibiting at the National Chain saw event on Aug. 1- 4 of this year. Barry Grill has turned blanks for the pen turning and Mark Palmer will be gluing then up to be ready. We will again accept items to be sold as a club fund raiser at the event. Bob Eberhardt did a great job demonstrating the "One Way" bowl saving equipment, very much appreciated. Bob Eberhardt will be teaching a beginner turning class for 5 Wednesdays starting Jan. 23rd. If interested contact Bob at [email protected] Beginner Turning Class in January Bob Eberhardt will be teaching 5 Wednesday classes on turning basics starting on Wednesday night 1-23- 19. We have openings for 6 members. The cost of the class is $15 which covers all supplies used. Classes will run for about 4 hours starting about 6pm. Anybody is welcome to come to these classes. Contact: Bob Eberhardt at [email protected] if you are interested in attending with your name, email, and phone number. January Demonstration 4 Bowl Saver Bob Eberhardt Note: A writeup of this demonstration was not done. Our apologes to Bob for this oversight. What is a Bowl Saver? Also known as a Core Saver, these varied turning tools enable the turner to utilize the entire bowl blank by cutting out the center of the blank for a bowl which would have otherwise been waste. 5 6 WOOD CHARACTERISTICS 7 JANKA HARDNESS In the pen woods of the month Janka Hardness has been left out in the criteria the Wood Database as well as Average Dry Weight, Specific Gravity, Modulus of Rupture, Elastic Modulus, Crushing strength and Shrinkage. Reviewing the meaning of each of these it became apparent that even though each has little useful meaning to woodturners, it can be useful to woodworking which many group members participate. Janka Hardness seems to be the more useful of these wood characteristics because there is a lot of information and most understandable. The other characteristics will be treated as short subjects. Janka Hardness is useful in determining how well a wood can with- stand dents, dings and wear. It indirectly predicts the difficulty in nailing, screwing, sanding and sawing a wood. One of its useful- ness is to determine the hardness of a wood to be used for a floor. From the Wood Database: Technically: “The actual number listed in the wood profile is the amount of pounds-force (lbf) or newtons (N) required to imbed a .444″ (11.28 mm) diameter steel ball into the wood to half the ball’s diameter. This number is given for wood that has been dried to a 12% moisture content, unless otherwise noted.” As an example:” For reference, White Oak has a Janka hardness of 1,360 lbf (6,000 N), while the super-hard Lignum Vitae has a hard- ness of an astounding 4,500 lbf (20,000 N). (Who could imagine a wood species that is over three times harder than White Oak?) On the lower end of the spectrum, Basswood has a hardness of around 410 lbf (1,800 N).” https://www.wood-database.com/wood-articles/janka-hardness/ From Wikipedia: “The hardness of wood varies with the direction of the wood grain. Testing on the surface of a plank, perpendicular to the grain, is said to be of "side hardness". Testing the cut surface of a stump is called a test of "end hardness". Side hardness may be further di- vided into "radial hardness" and "tangential hardness", although the differences are minor and often neglected. See January 2018 The results are stated in various ways, which can lead to confu- 8 sion, especially when the actual units employed are often not at- tached. Overall, the resulting measure is always one of force. In the United States, the measurement is in pounds-force (lbf). In Sweden it is in kilograms-force (kgf), and in Australia, either in newtons (N) or kilonewtons (kN). This confusion is greatest when the results are treated as units, for example "660 Janka".[1] https://en.wikipedia.org/wiki/Janka_hardness_test From Answers.com There are exotic woods (imported, that is) taken from the Amazon and milled in Brazil that are 80 times harder than oak; such as Ipe (Tabebuia) and Jatoba or Guapinol or Algarrado (Hymenaea cour- baril). Bamboo laminate has become more and more popular for flooring since the turn of the 21st century. Lignum vitae has a density rating of 1.23 grams per cubic centimeter, as compared to oak; which comes in at .65 grams per cubic centimeter, or Balsa wood; which comes in at 0.16 grams per cubic centimeter. Density relates to durability, but availability makes oak more widely used than Lignum vitae. This also explains the popularity of tile floors. www.answers.com/Q/ What_is_the_most_durable_hardwood_flooring Woodturning Video of Interest Mike Peace a well known woodturner has an interesting video on turning and gluing tips in relation to the importance of considera- tion of grain orientation. Somewhat basic but a pearl or two of useful information can be found in it. https://www.youtube.com/watch?v=QDaSD3S1pCY 9 Barry Grill with dyed deep hollow urn 10 Mark Palma with many dyed bowls which will be contributed to Feed My People event 11 Above: Mark Palma with large bowl and small bowl. Below: Mark Palma with cut away of a pepper mill. 12 Mark Palma bowl with inlay Mark Palm bowls made of Corion 13 Mark Palma cigar box with Cigar pens 14 Three walnut bowls made by Mary Weider from the Walnut wood ob- tained from farm in November 2018. The effect is due to a different orien- tation of the blank on the lathe. 15 Bruce Tremble with a Christ- mas ornament made of a sea Urchin and shared some methods he used to make it. John Layde had a burl that was roughly shaped like a turtle. Apologies to John Layde and a unrecord- ed member for not using their pictures. These were too blurred to be usable. 16 Randy Patzke with large segmented bowl See next page for turner and description 17 Unrecorded member with vase and two bowls Stemmed glasses . Turner not recorded. PEN WOOD OF THE MONTH 18 Common Name(s): Timborana Scientific Name: Pseudopiptadenia suaveolens (syn. Piptadenia suaveolens) Distribution: Central America and Brazil Tree Size: 65-100 ft (20-30 m) tall, 2-3 ft (.6-1.0 m) trunk diam- eter Janka Hardness: 1,550 lbf (6,880 N) On a scale between 22 and 5060lbs) Color/Appearance: Heartwood tends to be a golden to reddish brown. Sapwood is a lighter brown color, and is not always clearly distinct from heartwood. Sapwood may be over 2.5 inches (8 cm) thick. Grain/Texture: Grain tends to be interlocked and/or wavy. Regu- larly spaced large open pores give a coarse but even texture. Endgrain: Diffuse-porous; large pores in no specific arrangement; mostly solitary, with some radial multiples of 2-3; mineral deposits occasionally present; growth rings indistinct or distinct from seem- ingly marginal parenchyma; very inconspicuous rays not visible without lens; parenchyma primarily vasicentric or aliform. Rot Resistance: Timborana is generally regarded as durable or 19 moderately durable regarding decay resistance, though it is susceptible to insect attack. Workability: Timborana has a fairly high blunting effect on cutters due to its silica content. The wood is also somewhat difficult to sur- face, owing to its interlocked grain and density. Timborana glues and finishes well. Odor: No characteristic odor. Allergies/Toxicity: Although there have been no adverse health effects associated with Timborana, some species within the Piptadenia genus have been reported to cause eye, nose, and throat irritation.
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