Janka Hardness Test

The Janka hardness test measures the resistance of a sample of wood to denting and wear. It measures the force required to embed an 11.28 mm (.444 in) steel ball into wood to half the ball’s diameter. This method leaves an indentation. A common use of Janka hardness ratings is to determine whether a species is suitable for use as flooring.

Picking The Right Nailer For The Job

Numax currently only offers the SFL618 in its flooring line.  This nailer is designed for 1/2″ – 3/4″ Solid Tongue and Groove Flooring ranging from 0-1750 on the Janka Scale. Please refer to the graphic below for examples of flooring that this gun can be used for.  For all other flooring applications please visit our Freeman Tools site.

Flooring Installation Info.

Before Starting flooring installation make sure the size of the foot that is connected to the nailer matches the size of the flooring being installed.  Then ensure that you have the correct length staple or cleat for the flooring and sub-flooring being nailed into.  While nailing make sure that the groove is inserted into the tongue of the previous board and the staple/cleat is being fired into the tongue of the board.  The power of the mallet hitting the nailer should ensure that the board bing fastened is pressed firmly up agains the previous board.  When installing flooring nails should be spaces every 8-10 inches for boards 2″- 2 3/4″ wide, every 6-8 inches for boards 3″-3 3/4″ wide,and every 6″ for boards 4″-7″ wide.