Knots in Wood

K for Knots                                  



One way of defining a knot is simply a branch that the tree has either grown over or grown around. The knot therefore shows as an irregularity in the grain structure of the wood.  There are three types of knot which are found in wood:







The resulting weaknesses which knots can produce require special care when turning wood with these features.  Various options for dealing with loose knots include knocking out loose knots and using the void as a feature in the turning, using 5 minute epoxy glue to fix loose knots in the wood or using slow set epoxy glue and colouring to fill the void around the knot



When turning wood containing knots it is advisable to:’


  1. keep turning tools sharp,
  2. keep the lathe speed up,
  3. take light cuts and to use smaller sizes of turning tool.


These will help to minimise the forces which the turning tool will exert on the knot and reduce the likelihood of the knot being forced from out of the wood.



LEARNING POINTS


Do not try to turn pieces with loose knots in them until they have been removed

or secured in the wood.


When turning wood containing knots aim to minimise the force which is

exerted on the knots.



For illustrations see  Knots in wood from American Woodworker