Here is a breif history about Saw Blades. More than 500 years after the sawing frame, circular sawing machines were used in Great Britain (the British patent No. 1152 of Samuel Miller, August 5th 1777, Southampton, describes a wind driven construction), the Netherlands and France. The introduction of steam powered machines led to the first pendulum sawing machine (1815), constructed and built for the wood works at Portsmouth. This was the first length cut machine for round wood, using circular saw blades.
The problems using circular saw blades - still not sufficiently solved today - led during the 19th century to different saw blade constructions: segmented saw blade (diameter up to 1.6 m) (left), supporting disk with segmented tooth rim (1808) (middle), circular saw blade with exchangeable teeth by Eastman (patent of Stevenson and Ruthven, 1835) (right).
The problems using circular saw blades - still not sufficiently solved today - led during the 19th century to different saw blade constructions: segmented saw blade (diameter up to 1.6 m) (left), supporting disk with segmented tooth rim (1808) (middle), circular saw blade with exchangeable teeth by Eastman (patent of Stevenson and Ruthven, 1835) (right).