V belts have several really nice characteristics，V-Belt Suppliers share with you
They’re simple and cheap to use: they require no lubrication, V-belts and their appropriate pulleys are cheap and widely available, in a lot of case all you need is two pulleys and a belt and you’re good to go.
They fail under excessive load: This can sound like a bad thing, but in a lot of cases it’s a very good thing. Your belt might cost $10 and can be purchased locally if you don’t already have spares laying around, that’s a lot better place for a failure to occur than in your $500+ dollar motor that may take several days to replace or elsewhere in your machine which could set you back who knows how much or how long. A V-belt can serve as something like a fuse, a safe, easily replaced failure point that prevents damage from occurring elsewhere.
They stretch and slip just a little, which gives us a couple nice properties. For one this help to reduce the transmission of shock loads through the system, when the load spikes the belt stretches slightly and slips on the pulley slightly and both cushion that spike somewhat. The V-belts stretch and slip also means you can put multiple belts in parallel and expect them to share the load equally. If I need twice the power transmission and don’t want to use a bigger belt I can use two small ones. If one belt starts out taking more load than the other it’s going to slip a bit until both are evenly loaded. This might seem like a given, but on a stiffer drive system like a timing belt, roller chain, gear box, etc. it’s not at all guaranteed that multiple elements will equally share a load. You could wind up with one element doing all or most of the work, until it fails, then the other does all the work and also quickly fails.
These same characteristics mean they’re not perfect for every application:
The fact the belts do slip slightly means a V-Belt drive is not “synchronous”, you can’t connect two shafts with a V-belt and two identical pulleys know they’re going to stay in precise sync. For this reason you won’t see V-belts used in precision motion applications where it’s important that X number of revolutions of your drive motor corresponds to precisely Y inches of travel. If your familiar with cars think about the difference between the fan belt and the timing belt. The fan belt spins a lot of accessories but nobody cares if the alternator spins a little differently then the steering pump and compressor, so a V-belt works great. Your timing belt on the other hand needs to keep your cam shafts in precise synchronization with the crankshaft over many millions of revolutions, a 0.001 % slip between the two would quickly render the engine inoperable and possibly severely damaged, so a V belt would never be used there, instead we generally use chains or toothed belts.
The slip also means V-belts aren’t quite as efficient as some of the most efficient drive technologies, though in most applications this is not an issue, V-belts are pretty good.
V-belts are a bit more limited in the extremes of torque and speed than some other systems. They don’t want to run too fast or too slow.
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