Tail plane

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Wooden tailplane

The Spokeshave , Spokeshave or knacker is a planer for working wood. It is particularly used for machining strongly curved shapes. The plane sole and the iron can be straight, convex or concave in the transverse direction , the sole flat or convex in the working direction . It is not very suitable for processing large areas.

With the exception of the plane iron and possibly the sole, early models made before the 20th century were made of wood. They have a smaller blade angle than their younger counterparts with an iron body.

handling

Tail plane, taken apart. The polished iron is screwed to the metal ceiling.

The tailplane can be used “on pull” (that is, you pull it towards you) or under pressure. It is guided with both hands.

Simple models clamp the iron with just one screw. To ensure that it is at the correct distance from the sole - it must only produce extremely thin wood shavings - you press the tail plane onto a medium-hard, flat surface, such as a piece of wood, insert the iron and also press it down. Then the iron is screwed tight with the help of the metal flap.

Newer models are equipped with trim screws. They make it easier to set the iron precisely and also prevent the iron from pushing upwards during work and reducing the amount of material removed. For this reason, models without trim screws have to be readjusted more often.

Tail plane with flat and (right) rounded sole

For work on concave (inwardly rounded) pieces of wood, tail planes with a special rounded sole are used.

Incorrect handling can lead to so-called "chatter marks". This can have different causes:

  • The iron protrudes too far so that too much wood is removed
  • The iron is not sharp enough
  • The processed piece of wood vibrates, for example when it is too thin and not underlaid.
  • The pressure on the tailplane is too low

The marks arise when the iron digs too deeply into the wood and the tail plane is tilted slightly due to the resulting resistance, gets caught and then jumps.

use

Tail plane making bows . The front part of the limb was rounded off at the side, the unprocessed piece can be seen at the back.

Until the end of the 20th century, the tail plane was used in woodworking crafts and probably also for leather processing. In the meantime it has been largely replaced by machines, but is still used in traditional manufacturing processes, especially for individual pieces.

Individual evidence

  1. ^ Günther Heine: The carpenter's and turner's tool , Verlag Th.Schäfer, Hanover 1990, ISBN 3-88746-228-9 , page 126

literature

  • Günther Heine: The tool of the carpenter and turner , Verlag Th. Schäfer, Hanover 1990, ISBN 3-88746-228-9

Web links

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