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Rude Osolnik (1915–2001), was an American woodturner, author, and educator. He is considered an important figure within the American studio woodturning movement and in contemporary woodturning in the United States. [1] [2] He was the department head in the woodcraft industry program at Berea College for forty years. [3]
The nature of wood defines woodturning techniques. The orientation of the wood grain, relative to the axis of the lathe, affects the tools and techniques used by the woodturner. In spindle turning, the grain runs lengthwise along the lathe bed, as if a log were mounted in the lathe.
The process of reducing the moisture content of wood before working to prevent cracking, splitting, and other damage often caused by drying. shake 1. A crack or split in wood caused by damage or drying. 2. A split (as opposed to sawn) shingle. shim
Air-drying timber stack. Wood drying (also seasoning lumber or wood seasoning) reduces the moisture content of wood before its use. When the drying is done in a kiln, the product is known as kiln-dried timber or lumber, whereas air drying is the more traditional method. There are two main reasons for drying wood: Woodworking
Typical French craquelure in a portrait from c. 1750, larger and less regular patterns, with curving cracks. Painting systems are composed of complex layers with unique mechanical properties that depend on the type of drying oil or paint medium used and the presence of paint additives, such as organic solvents, surfactants, and plasticizers.
A crack or cracks propagating from near the edge of the log towards the centre, usually along the line of the medullary rays, causing the wood to shrink more at right angles to the medullary rays than along them, causing warping of anything made from the wood. The cause is often rapid or uneven seasoning, causing the outside of the log to ...
A therming rig includes individual turning blanks separated by gaps when mounted between end plates. These gaps result in a process called ‘turning air’, as shown in Figure 4, where the cutting action occurs intermittently as the turning blanks rotate past the cutting tool. Production therming rigs often hold 20 or more spindles at a time.
Moisture can also cause wooden lath to expand and contract, causing the plaster around it to crack. [5] Additionally, failure can also occur in the plaster keys. Over time, the keys can deteriorate and crack, weakening their ability to hold the plaster onto the lath. [12] The addition of hair in plaster helps to prevent this by adding strength.