The Deering knot, by comparison, can start to slip very easily, causing friction inside the knot that can start to burn the twine, which is the starting point of the knot pulling through or the twine breaking in extreme conditions. The Cormick knotting system actually makes a ‘double diameter’ knot, commonly known as a bow knot (loop knot) with tails of different lengths, which usually avoids any slipping of the twine inside of the knot. There are two distinctly different types of knots used in large square balers the Cormick type knot and the Deering type knot. In this way, it is possible to give a much clearer indication of one twine against another, important when choosing which twine to use in which baler.Ĭan you ever really know the ‘knot strength’ ?Īn important point that many twine users may not appreciate is the type of knot that their baler makes actually has a critical impact on how strong the twine actually is in their machine. However, the baler operator also needs to re-load the baler more often.Ī more accurate way of benchmarking the quality of a twine is to understand what is called the ‘Relative Strength’, where the efficiency of the twine yarn is measured as a factor of the Tensile Strength against the ‘real’ runnage (m/kg). Both types of twine, 150 and 130, are made in the same size and weight 2-spool pack, so thicker twine obviously means less length in each pack, but the thicker twine is stronger. Heavier and denser bales need stronger twine which, of course, means thicker twine. Others may make heavier bales where bale density is more important and maximum bale weight is needed if the bales are being transported, where the stronger ‘Type 130’ is the usual choice. Traditionally, big bale twine has two specific market users those who make normal density big-bales, often where the straw is used as frost protection covering for root vegetables, typically using ‘Type 150’ twine.
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