Abstract: Features of the direct fired heater can facilitate and improve setup and operation thereof. The direct fired heater can include a housing forming an airflow passage and the airflow passage having an inlet and an outlet; an air moving device to flow air from the inlet to the outlet; gas fired burner disposed in the housing; a pivotal airflow damper disposed in the housing relative to the gas fired burner to control the air flow rate through the burner; and an adjusting device for adjusting the damper from outside the airflow passage. Sensing probes disposed in the airflow passage upstream and downstream of the burner and a pressure differential measuring instrument, such as a manometer, disposed outside of airflow passage in communication with the upstream sensing probe and the downstream sensing probe can measure the differential pressure upstream and downstream of the burner.

Abstract: The present invention relates to a cutting insert for a milling cutter. The cutting insert includes a main body having a top face and at least one elevated corner nose area formed on the top face. Extending around the elevated corner nose area and along an adjacent side face of the cutting insert is a cutting edge. The elevated corner nose area includes an angled chamfer that intersects with the cutting edge and a flat surface disposed inwardly of the angled chamfer. A pair of tapered lands extend from the flat surface toward a respective side face of the cutting insert where each of the tapered lands intersect with the cutting edge.