How to Measure V Belt Tension
Nov 24, · Check the belt tension. Check the tension on the longest length of the belt; there should be no more than one-half to one inch ( centimeters to centimeters) of give%(). The Gates Sonic Tension Meter measures belt span tension easily and accurately. Belt tension is measured by plucking the belt span while holding a sensor close by. Belt tension is adjusted until the belt span frequency, or measured tension level is within manufacturer’s recommendations.
Checking the tension of all your V-belts is important. Too much tension, and the belt will stretch and start to tear. Not enough tension causes the belt to slip and the pulleys scratch away at the belt. For each device, be it a car or washing machine, there is a specific amount of pressure the belt needs to be under in order for it to work efficiently.
There are two measurements used in belt tension. Length of belt and amount of pressure for deflection. Knowing these measurements helps you setup and use your tension gauge. Make sure the unit is turned off and the pulleys you are working with are not moving. Do a visual check of the V-belt to see if it is cracked or worn in any spots.
Look for any shiny parts along the part of the belt that comes in contact with the pulleys. This indicates belt slippage. A damaged or excessively worn belt needs to be replaced. Measure the distance from the center of one pulley to the center of the second pulley. If there are more than two pulleys on the belt, take your measurement using the two pulleys with the longest span of the belt.
Multiply that measurement by one-sixty-fourth of an inch. Set the "O" ring on the handle of your tension gauge to the measurement from your calculation. Set the second "O" ring on the plunger against the body of the tension gauge at the how to close google plus account mark. Place your piece of wood against the two pulleys, and line it up with the top edge of the pulley you are testing.
Hold the wood in that position without moving it. Place the plunger end of the tension gauge on the top of the belt. Holding the tension gauge vertical to the belt press down until the bottom of the "O" ring on the plunger is even with the top of the wood.
Lift the plunger from the belt, and read the pounds of force measurement at the "O" ring on the plunger. This is the measurement that should match with the specifications listed in what is the cost for tamiflu manual for the device.
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He holds a level one standing in university physics and how to check belt tension by hand from Fanshaw College.
Step 1 Make sure the unit is turned off and the pulleys you are working with are not moving. Step 2 Do a visual check of the V-belt to see if it is cracked or worn in any spots.
Step 3 Measure the distance from the center of one pulley to the center of the second pulley. Step 4 Multiply that measurement by one-sixty-fourth of an inch.
Step 5 Place your piece of wood against the two pulleys, and line it up with the top edge of the pulley you are testing. Take the measurement when the belt is room temperature. V-belt tension gauge Tape measure Straight flat board.
Make sure it is the right type of belt. Belts of different material require different tension.
Installation & Maintenance Toolbox
Belt tension is the single most important factor in ensuring long life of V belts, pulleys and supporting bearings. There are two general procedures for determining proper belt tension. Deflecting the belt mid-span to pre-determined distance and confirming proper deflection force. or. Measure the vibration frequency of the belt using the BTM. Apr 04, · Belt tension can also be measured, or estimated, by causing the belt to deflect by a given amount (typically 1/64 inch per inch of belt span, or mm per 25 mm of belt span) with a specified force. Often referred to as the force-deflection method, the minimum and maximum forces necessary to produce the specified deflection for a given tension.
Updated June One of the benefits of synchronous belts is their ability to operate with lower tension than their V-belt counterparts. And once the proper tension is determined and applied, synchronous belts rarely need re-tensioning. But improper tension in a synchronous belt drive system — either too low or too high — can lead to poor meshing between the belt and pulleys, belt ratcheting , or even reduced load and acceleration capability.
To that end, belt applications can generally be classified as:. Motion transfer: In these applications, the torque load on the belt and pulley is relatively light, and the tension is correspondingly low.
The primary purpose of belt tension in motion transfer applications is to ensure the belt conforms to and meshes properly with the pulleys. Power transmission: For general power transmission, loads tend to be variable, with belts experiencing both constant and peak loads.
Therefore, power transmission applications tend to require higher belt tension to ensure the belt maintains proper mesh with the pulleys and to prevent the belt from ratcheting under peak loads. Registration: When belts are used primarily for positioning registration , the goal is to ensure maximum accuracy from the belt and pulley drive by reducing backlash. Once the proper tension value has been determined, there are several ways the actual tension can be measured.
One common method involves measuring disturbances in the air surrounding the belt due to vibration. The tension force is then calculated based on this vibration frequency, the length of the vibrating belt span, and the mass of the belt. Often referred to as the force-deflection method, the minimum and maximum forces necessary to produce the specified deflection for a given tension are calculated via formulas.
Note that this method is best used on belts with longer span lengths. When the belt system uses a simple two-pulley configuration, the distance between the pulley shafts is directly related to the tension on the belt, so this distance can be used to determine the belt tension. This method is often referred to as the shaft separation method. But be aware that if the pulleys have different diameters, the belt spans will need to be added as vectors to determine the resulting tension force.
Similar to the shaft separation method, tension can be induced on the belt via the position of the idler pulley. In this method, a force is applied to the idler pulley, causing it to move. Once the pulley position is determined, it is fixed in place to ensure the tension is maintained.
Like the shaft separation method, the idler pulley tensioning method may require vector summation of the belt spans if more than two pulleys are used in the system. The shaft separation and idler pulley methods are typically more accurate, but require vector calculations for systems with multiple pulleys and belt spans. Sonic tension measurement devices are simple to use, but ambient noise can interfere with their accuracy. You must be logged in to post a comment. You may also like: When do synchronous belts need flanged pulleys?
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