Strob Saw Blade
Encyclopedia
Strob Saw Blades are circular saw blades with the addition of two or more specialised raker/cutters and were invented by Keene S. Strobel (1907-1989) of Everett
and Peter E. Heiser of Issaquah. These rakers are fitted on the trailing edges of more-or-less radial slots cut in the blade and are designed to reduce friction and rapidly eject sawdust, thereby preventing scorching and distortion of the blade faces, improving cutting efficiency and reducing sharpening frequency. Weyerhaeuser
were granted a patent on strob saw blades in 1971, but there has been little improvement in the design since then.
The Strob inserts or rakers, have cutting edges which extend outside the two plane surfaces of the blade, but fractionally less than the kerf. These rakers have some important advantages, primarily the ease with which they saw through green or uncured wood which would otherwise jam the saw blade. Strob rakers are made from hard metals such as tungsten carbide
, cobalt-steel alloy, or Stellite
.
Everett, Washington
Everett is the county seat of and the largest city in Snohomish County, Washington, United States. Named for Everett Colby, son of founder Charles L. Colby, it lies north of Seattle. The city had a total population of 103,019 at the 2010 census, making it the 6th largest in the state and...
and Peter E. Heiser of Issaquah. These rakers are fitted on the trailing edges of more-or-less radial slots cut in the blade and are designed to reduce friction and rapidly eject sawdust, thereby preventing scorching and distortion of the blade faces, improving cutting efficiency and reducing sharpening frequency. Weyerhaeuser
Weyerhaeuser
Weyerhaeuser is one of the largest pulp and paper companies in the world. It is the world's largest private sector owner of softwood timberland; and the second largest owner of United States timberland, behind Plum Creek Timber...
were granted a patent on strob saw blades in 1971, but there has been little improvement in the design since then.
The Strob inserts or rakers, have cutting edges which extend outside the two plane surfaces of the blade, but fractionally less than the kerf. These rakers have some important advantages, primarily the ease with which they saw through green or uncured wood which would otherwise jam the saw blade. Strob rakers are made from hard metals such as tungsten carbide
Tungsten carbide
Tungsten carbide is an inorganic chemical compound containing equal parts of tungsten and carbon atoms. Colloquially, tungsten carbide is often simply called carbide. In its most basic form, it is a fine gray powder, but it can be pressed and formed into shapes for use in industrial machinery,...
, cobalt-steel alloy, or Stellite
Stellite
Stellite alloy is a range of cobalt-chromium alloys designed for wear resistance. It may also contain tungsten or molybdenum and a small but important amount of carbon...
.