What is the pitch diameter of a timing belt pulley?
Pitch Diameter (P.D.) = (Pitch x Number of teeth) / Pi (3.14159) Timing belt pulley Outside Diameter (O.D.) further builds upon the relationship between the timing belt pulley and timing belt.
What is timing pulley pitch?
Timing belt pitch refers to the center-to-center distance between the center of one tooth on a pulley to the center of the adjacent tooth. The timing belt tooth profile describes the shape of the tooth that is designed specifically for the type of application on which the timing belt pulley will be used.
How do you determine the diameter of a pulley?
Tensioning pulley diameter must be equal to that of the smaller pulley of the drive. 6. If tension pulley of flat type is to be used then it should be placed on the outside of the belt and at one third of centre distance from the driving pulley.
What is the use of pitch diameter?
The pitch diameter (also known as the effective diameter) is used to determine whether two threaded parts could be successfully mated together. Properly mated parts will demonstrate equal distance between thread flanks when in contact.
How is belt pitch measured?
Pitch is measured from the right edge to the right edge of two adjacent teeth, e.g. 9.53 mm = 3/8 in (belt type L)… or from the centerlines of two adjacent teeth, e.g. HTD pitch = 8 mm… or plastic belt pitch is 10 mm.
Do you need to tension a timing belt?
Timing belt installation should be a snug fit, neither too tight nor too loose. The positive grip of the belt eliminates the need for high initial tension. Consequently, a belt, when installed with a snug fit (that is, not too taut) assures longer life, less bearing wear and quieter operation.
What happens if you over tighten a timing belt?
If the timing belt is too tight, it could wear out the bearings in your engine and potentially cause your belt to snap.
What is basic pitch diameter?
PITCH DIAMETER-The basic thread pitch diameter is the diameter where the thread thickness is equal to the space between the threads. If the flats at the top and bottom of the thread are the same, the pitch diameter will coincide with the middle of the sloping side of the thread.
What is timing belt pulley pitch diameter?
Timing belt pulley Pitch Diameter (P.D.) has a direct relationship between the timing belt pulley and the timing belt. The reinforcing tensile cord of the timing belt forms the pitch line of the timing belt.
What does od mean on a timing belt pulley?
Timing belt pulley Outside Diameter (O.D.) further builds upon the relationship between the timing belt pulley and timing belt. The Outside Diameter (O.D.) of the timing belt pulley is in contact with the tooth bottom of the timing belt while meshing with it.
What are the common problems with the timing belt pulley?
Timing Belt Pulley Flange Failure Timing Belt Pulley Unusual Wear Timing Belt Tension Loss (Ratcheting) Timing Belt Tensile Break Timing Belt Tooth Shear Timing Belt Tracking Timing Belt Unusual Noise (Excessive Noise) Vibration Timing Belt and Timing Belt Pulley – Installation Timing Belt – Installation Timing Belt Pulley – Installation
How do you find the outside diameter of a timing belt?
The distance from the timing belt tooth bottom to the tensile cord (pitch line) will determine the Outside Diameter (O.D.) of the timing belt pulley for any timing belt pitch/timing belt tooth profile. Outside Diameter (O.D.) = Pitch Diameter (P.D.) – (2 x U)