JANKA HARDNESS SCALE PDF

The Industry Standard for Hardness The hardness of a wood is rated on an industry wide standard known as the Janka test. The Janka test measures the force. The Janka Scale is a comprehensive chart of hardness ratings for a huge variety of wood species used for hardwood floors. Learn how to read it and how it. 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.

Author: Akinogul Voodoogore
Country: Syria
Language: English (Spanish)
Genre: Video
Published (Last): 26 June 2016
Pages: 438
PDF File Size: 13.77 Mb
ePub File Size: 14.82 Mb
ISBN: 854-4-90689-469-3
Downloads: 80400
Price: Free* [*Free Regsitration Required]
Uploader: Kele

In the United States, the measurement is in pounds-force lbf. I had a question — At what measure of hardness is a wood classified as a hardwood or softwood? Sca,e from the original on 26 April Wood as an Engineering Material. Tropical Timbers of the World.

Janka hardness test – Wikipedia

No information on contributors is available for this page. Skip to main content. Jwnka to hard of a surface on your bench can cause marks in your work.

This test measures the force required to embed an The Janka hardness test from the Austrian-born emigrant Gabriel Janka, measures the resistance of a sample of wood to denting and wear. The results are stated in various ways, which can lead to confusion, especially when the name of the actual units employed is often not attached. We have listed some of the most popular choices in wood flooring and included some more exotic species for your reference and comparison.

For years, bamboo was not mentioned in Janka reports and list.

  MANUAL DE TREINAMENTO E DESENVOLVIMENTO GUSTAVO BOOG PDF

This should only be used as a general guide when comparing various species of wood flooring. A common use of Janka hardness ratings is to determine whether a species is suitable for use as flooring. A measure of the hardness of wood, produced by a variation on the Brinell hardness test.

Is there a specific threshold? Frame and panel Frameless construction. Save my name, email, and website in this browser for the next time I comment. Douglas fir provided a good stable surface to work on. Thank you for clarifying.

Janka Hardness

The test measures the force required to push a steel ball with a diameter of Sometimes the results are treated as units, e.

This number is incredibly useful in directly determining how well a wood will withstand dents, dings, and wear—as well as indirectly predicting the difficulty in nailing, screwing, sanding, or sawing a given wood jnaka. Who could imagine a wood species that is over three times harder than White Oak?

The actual number listed in the wood profile is the amount of pounds-force lb f or newtons N required to imbed a. The Industry Standard for Hardness The hardness of a wood is rated on an industry wide standard known as the Janka test.

It is a question of whether you want hardnews marks to show up on your new piece of work or on the work bench. With the rising popularity of bamboo as flooring, the Janka test has been forced to include the diverse ratings for different bamboo floors. The results are stated in various ways, which can lead to confusion, especially when the actual units employed are often not scwle. February 4, at 8: BPS October 22, at 2: The pale blue background sca,e species growing in North America.

  IBSEN UPIORY PDF

This method results in an indention square millimeters in size. Douglas fir works out great for wood working benches. Forest Products Laboratory, March Retrieved 20 December The Janka test measures the force required to embed a.

Janka hardness

Soft and Ambrosia Maple. In Sweden it is in kilograms-force kgfand in Australia, either in newtons N or kilonewtons kN. This test is one of the best measures of the ability of a wood specie to withstand denting and wear.

It is also a good indicator of how hard a species is to saw or nail. Ramon Alvarez March 18, at 4: Are you an aspiring wood nerd? Woodworking Woodcarving Wood Hardness tests. Some information sources say or imply, incorrectly, that Janka hardness is measured in units of pressure, such janja pounds per square inch, and that side hardness is a synonym for Janka hardness.

Statistics below compare the janka hardness ratings for hardwood and bamboo flooring products. Testing the cut surface of a stump is called a test of “end hardness”.

Each wood has been meticulously documented and photographed, listed with its Janka hardness value in lbf and geographic and global hardness rankings. Retrieved 18 March Plank construction and finish are also important factors when determining the durability and ease of maintenance of any wood floor.

The Janka scale rates the relative hardness of wood. The tabulated Janka hardness numbers are an average.

What size pieces are needed to run a Janka test and where can these tests be carried out?