Variable Pitch Sheaves
The principle of a variable pitch sheave is that the threaded angular faced discs forming the V-shaped groove in which the belt rides are movable. VP sheaves consist of a male with a threaded barrel, and a female with a threaded bore. The male section with threaded barrel has flat surfaces at 180 deg increments that allow a flat surface for the setscrew to mate with. When the discs are moved toward each other, the belt rides higher in the groove and the pitch diameter of the sheave is larger which increases the driven speed. When the discs are moved away from each other, the belt rides lower and the pitch diameter is smaller decreasing the driven speed. The common term for this speed adjustment is called number of turns open from closed position.
The principle of a variable pitch sheave is that the threaded angular faced discs forming the V-shaped groove in which the belt rides are movable. VP sheaves consist of a male with a threaded barrel, and a female with a threaded bore. The male section with threaded barrel has flat surfaces at 180 deg increments that allow a flat surface for the setscrew to mate with. When the discs are moved toward each other, the belt rides higher in the groove and the pitch diameter of the sheave is larger which increases the driven speed. When the discs are moved away from each other, the belt rides lower and the pitch diameter is smaller decreasing the driven speed. The common term for this speed adjustment is called number of turns open from closed position.
Recently Viewed
#8 X 1" Pan Head Phillips Tek Screws
3/8" X 1-1/4" SAE SOCKET SET SCREWS-NBS7300380125 >
#6 X 5/8" Hex Head Tek Screws
5/8" X 2" Square Head Set Screw
Irwin® 5026015 501 Rotary Hammer Drill Bit, 1/2 in Drill Bit, 3/8 in Round Shank, Tungsten Carbide Cutting Edge, 6 in OAL
Tungsten carbide tip is durable when drilling in concrete and brick. Deep single flute removes dust fast for increased drilling speed and longer bit life. Diamond ground tip has aggressive cutting angles for increased drilling speed. Fits all hammer drills with 3-jaw or Jacobs chuck.
Power through masonry, concrete, rock, and more with DeWALT® hammer drill bits. Featuring rock carbide tips that maximize surface contact for extended bit life and a 4-flute design that cleans debris while you work. 3 flats on the shank eliminate bit slippage.
