Haglof 3-Thread Increment Borers (10L x 0.169 Dia.)

The use of an increment borer is essential for extracting cores of wood from trees, treated poles, piling, lumber, or timbers to assess growth rate, age, tree soundness, and chemical penetration. The Teflon coating on the borer bit serves to protect it from rust, resin build-up, and reduce friction during operation.

When selecting the appropriate increment borer for your specific needs, there are three key factors to consider: bit length, core diameter, and thread style. The borer bit length should be chosen based on the size of the trees you will be working with, as it determines the maximum depth the bit can penetrate. The core diameter of the wood sample is determined by the inside diameter of the opening at the threaded end of the bit, with options like 0.169” for general forestry use, 0.200” for wood preserving testing, and 0.500” for qualitative analysis of large wood amounts.

The thread style, whether 2-thread or 3-thread, is a personal preference. A 2-thread borer features two threads on the cutting edge, while a 3-thread borer has three threads, with the latter providing deeper penetration per revolution and less friction due to more steel contact with the wood. The ease of wood penetration also depends on factors like wood hardness, friction properties, and the user's capability and strength.

In summary, when choosing the right increment borer, consider the tree size, core diameter, and preferred thread style to ensure optimal performance and accurate results in wood core extraction.

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