Wood Hardness

Wood hardness has a big impact on how wood turns.  The Janka Scale is one tool for measuring the hardness.  Wood density and weigth of wood are also indicators of how wood will turn

Here is a link to an article that explains the Janka Scale

Here is a table of Janka values with woods sorted  both alphabetically and by hardness

Here is a link to an article fro0m engineersedge.com about specific gravity and weight of wood

Here is a link to an article from srs.repair about specific gravity and weight of wood

Here is a link to an article from bellforestproducts.com about specific gravity and weight of wood

Here is a link to an article from cecalc.com about specific gravity of wood

Here is a link to an article from wood-database.com about wood hardness.  Wood-database.com also has many articles about various properties of wood.