How do you determine the diameter of a pulley?
Place your pulley face down on a flat surface, then put your ruler or caliper on top, measure from outside edge to outside edge across the circle of the pulley. Check carefully to make sure you are measuring across the center.
What is HTD pulley?
High Torque Drive (HTD) Belts have a parabolic tooth profile that enables increased surface area contact between the pulleys and the belts. Metric pulleys are available in 4 pitches, these include 3mm (3M), 5mm (5M), 8mm (8M), and 14mm (14M).
What is pitch diameter of a pulley?
pitch diameter: Diameter of the pulley at the pitch line level of the belt used with this pulley. pitch circumference: Circumference of a circle with a diameter equal to the pitch diameter. effective diameter: Reference diameter of the pulley at the tip of the grooves, with the minimum specified transitional radius.
Which size of a pulley is standard?
At least 3/4 of the belt fits inside the groove of the pulley. A slight overhang is acceptable….Pulley Definitions.
| Shaft Size/ Inside Diameter | Standard Keyway Size |
|---|---|
| 3/4” (0.75) | 3/16” (0.187) |
| 7/8” (0.875) | |
| 1” | ¼” (0.25) |
| 1-1/8” |
How do you find the minimum pulley diameter?
Calculate Reaction on Bearing Location Gearbox reaction on shaft = 79,614 N. Torque input to shaft by each drive assembly (equal with torque generated by belt tension) = (BT1 – BT2)/2 x Pulley Diameter /2 = 52,341 N.m.
What is HTD timing belt?
HTD® Timing Belts feature a curvilinear tooth profile, which is a design advancement over the standard trapezoidal shaped belts. The curvilinear profile allows the belts to have a much larger contact area with the pulley, which improve performance.
What is pitch diameter on V belt pulley?
For most belts and sheaves, the dimensions formerly referred to as pitch length (belts) and pitch diameter (sheaves) are now referred to as datum length and datum diameter. In terms of sheave dimensions, the pitch diameter is now equal to the outer diameter for most standard sheaves.
How to size up a HTD timing pulley?
To size up a HTD timing pulley we must know the following ! BORE- If the bore is taper bore then the prefix is ‘P’. If the bore is Pilot bore then there is no prefix, however check the bore size to make sure that it will fit in to a standard pulley. ! TEETH- This is self explanatory. Simply count the number of teeth in the pulley. !
How is the diameter of the timing belt pulley determined?
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. 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.
What kind of pulley do I need for an 8m drive?
Pulleys for 5M, 8M and 14M drives are available with parallel pilot bore for reworking to customers requirements , bored for shaft clamping elements, or with taper bore to be combined with stock taper bushes for the complete off the shelf drive.
How big is a RPP silver belt pulley?
Further development created RPP Silver Belts in 8mm (8S) and 14mm (14S) pitch with double power capacity; and RPP Gold Belts in 8mm (8G) and 14mm (14G) pitch with treble capacity; both still operating on standard metric pulleys allowing full interchangeability with existing drives. Drives up to 800 KW can now be transmitted.