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Spinning a large turning blank too quickly may cause it to explode. Inappropriate use of tools such as gouges and skew chisels can cause a catch, where the tool bites suddenly and aggressively into the wood in an uncontrolled manner. These risky practices can exert extremely large forces upon the wood, the tool, the lathe, and the operator.
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.
The finishing stage was turning the leg with the pole lathe (the pole lathe was made on site). Once the leg or stretchers were finished, being of "green" wood, they required seasoning. Chair legs would be stored in piles until the quota (usually a gross of legs and the requisite stretchers) was complete. The bodger would then take their work to ...
A lathe is a machine tool used principally for shaping pieces of metal, wood, or other materials by causing the workpiece to be held and rotated by the lathe while a tool bit is advanced into the work causing the cutting action. Lathes can be divided into three types for easy identification: engine lathe, turret lathe, [5] and special purpose ...
For spindle turning, the wood is held on the lathe either by both ends (between the headstock and tailstock) or by one end only using a lathe chuck [2]. Wood is generally removed by running a turning tool down the slope of the wood from a larger diameter in the wood to a smaller diameter.
A pole lathe in a museum in Seiffen, Germany. A pole lathe, also known as a springpole lathe, is a wood-turning lathe that uses the resilience of a long pole as a return spring for a treadle. Pressing the treadle pulls on a cord that is wrapped around the piece of wood or billet being turned. The other end of the cord reaches up to the end of a ...