The Janka scale is used to determine the relative hardness of particular domestic or exotic wood species. The Janka test measures the amount of force required to embed a 0.444" steel ball into the wood to half of its diameter. Woods with a higher rating are harder than woods with a lower rating. The scale used in the table is pounds-force.
2021-5-6 · For reference, white oak has a Janka hardness of 1,350 lb f (5,990 N), while the super-hard lignum vitae has a hardness of an astounding 4,390 lb f (19,510 N). (Who could imagine a wood species that is over three times harder than white oak?) On the lower end of the spectrum, basswood has a hardness of around 410 lb f (1,820 N).
2021-5-6 · Janka Ratings. When in doubt about the type of wood to select for your cabinetry, flooring, furniture or millwork project, refer to the Janka Rating System, which measures the relative hardness of woods. The hardest commercially available domestic hardwood is hickory; it is five times harder than aspen, one of the “soft” hardwoods.
2020-12-14 · 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. The Janka test measures the amount of
2017-5-6 · The Janka Scale was developed by the Austrian wood researcher named Gabriel Janka back in 1906. However, it was only in 1927 when Janka’s scale was standardized by the American Society for Testing and Materials (ASTM). Now, this wood hardness
The Janka hardness test measures the resistance of a sample of wood to denting and wear. It measures the force required to embed an 11.28mm (.444 in) steel ball into wood to half the ball’s diameter. This method leaves an indentation. A common use of Janka hardness
Janka hardness of a given wood species is defined by a resistance to indentation test as measured by the load (pounds of pressure) required to embed a 11.28mm or 0.444" diameter ball to one-half its diameter into the wood. The Janka values presented are the average of penetrations on both flat grain or plain sawn and vertical grain or quartersawn
It was invented by Gabriel Janka, an Austrian wood researcher in 1906. It became accepted as a tool by the American Society for Testing and Materials in 1972. It is used to measure denting and resistance to wear of a particular wood sample. How is the