For the judgement of production performance of band-saw blades, and thus of production lines, a practical, inexpensive method is presented as an alternative to the presently available laser-guided solution. To investigate the saw blade sawing capacity, twelve beech and pine logs were sawn up to 267 boards in a mill under controlled conditions. Data were taken from the logs, the band saw machine and the sawing process. Sawing of logs was carried out using three chosen log speeds. For the determination of density and moisture content, solid wood and sawdust samples were collected. Additionally, the sawdust samples were subjected to standard compression tests. The results demonstrate that (i) sawdust might show two and more times loser density in the tooth gullet than that of solid wood depending on cutting height and log feed speed, that (ii) it was possible to determine the degree of utilisation of the cutting potential using practical data, and that (iii) the usual sawing operation made use of the blade capacity of 40 % to 80 % only. Based on these findings, an increase of the sawing performance of around 20 % became possible.