Taun Hardwood Janka Scale

The janka hardness test measures the force required to embed a 444 inch steel ball to half its diameter in wood.

Taun hardwood janka scale.

The janka hardness test from the austrian born emigrant gabriel janka 1864 1932 measures the resistance of a sample of wood to denting and wear. Taun is moderately hard rated 3 on a 6 class scale in relation to indentation and ease of working with hand tools. The janka test measures the force required to embed a 444 inch steel ball into the wood by half its diameter. The janka hardness scale determines the hardness of a particular type of wood over another.

The scale was invented in 1906 by gabriel janka an austrian wood researcher and standardized in 1927 by the american society for testing and materials astm. This test is one of the best measures of the ability of a wood specie to withstand denting and wear. Woods with a higher rating are harder than woods with a lower rating. In laymans terms it is a way to measure a woods resistance to denting.

The janka rating is a measure of the amount of force required to push a 444 diameter steel ball half way into a piece of wood. The industry standard for hardness the hardness of a wood is rated on an industry wide standard known as the janka test. It is not productive to take issue with the exact number but rather understand the relative hardness of one wood to another. To give some quantification to the issue of wood species hardness the lumber industry created the janka hardness scale a standard now widely accepted as the best means of ranking a wood s hardness.

It measures the force required to embed an 11 28 millimetres 0 444 in diameter steel ball halfway into a sample of wood. The timber saws and turns easily with only a moderate blunting effect on cutting edges. The higher the number the harder the wood is this should be used as a general guide when comparing various species of wood flooring. The janka test measures the amount of force needed to drive a 0 444 inch steel ball into wood to a depth equal to half its diameter.

It is one of the best measures of the ability of a wood species to withstand denting and wear. The janka hardness scale wood hardness scale this scale includes all of the different species of hardwood and rates them according to their hardness and durability against wear and indentations caused by heels of shoes or dropping items on the floor.