How do you find the dimensions of a pulley?
Measuring Pulley Outside Diameter 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 pulley groove?
A pulley may have a groove or grooves between flanges around its circumference to locate the cable or belt. The drive element of a pulley system can be a rope, cable, belt, or chain. Pulleys are assembled to form a block and tackle in order to provide mechanical advantage to apply large forces.
What is a double V belt?
Also known as double V-belts, are designed for use on drives with one or more reverse bends. They usually transmit power from both sides of the belt. To meet the multiple-bend and dual-power requirements, ContiTech builds Hex belts with rugged Vytacord tension members.
How do you determine the diameter of a pulley?
Step 4: To determine diameter of pulleys. Step 5: Standard pulley diameters: d = 280 mm and D = 450 mm (OR) d = 250 mm and D = 400 mm can be selected. For this problem, d = 280 mm and D = 450 mm is selected. The diameter of the smaller pulley is greater than the minimum value (200 mm) recommended.
What is pulley pitch diameter?
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.
Why do pulleys have different diameters?
These wheels are driver and driven pulleys. By changing the diameter of the pulley wheels, speed can be changed. A smaller pulley turning a larger pulley results in the larger one moving more slowly but with more shaft power.
What is a single fixed pulley?
A pulley which has its axis of rotation fixed in position is called a single fixed pulley. It is used to change the direction of effort.
What is a banded belt?
Banded belts combine the stability of flat belts with the raw performance of v-belts to keep machinery in motion for longer. Banded belts feature multiple v-belt strands which wedge into matched pulleys eliminating single belt faults under fluctuating and pulsating load tensions.
How deep should V belt sit in a pulley?
Figure 58.4 is an illustration of how a V-belt should sit in the pulley groove. The top of the belt should be within -inch of the outer surface of the pulley. If the belt top is deeper in the groove, the groove or belt is worn, which can shorten the remaining belt life by as much as 50 per cent.