A bicycle sprocket is a type of gear that pulls a chain and converts pedaling force into rotation of wheels. Its size is adjustable to accommodate different gearing situations. The same design is used in motorcycles and some motorized vehicles. These types of sprockets have a wide variety of applications. Listed below are some of their common uses. This article explores the basics of these gears.
The length of the chain is another consideration. Chains should be replaced when the chain has reached 3% or 1.5% elongation, respectively. For fixed-centre drives, the chain should be replaced at a point where it is half the length of the sprocket’s teeth. Likewise, the chain must be lubricated before startup and periodically inspected for signs of wear and oil condition. Chain drive systems should be installed according to safety guidelines in the plant.
Sprockets come in two basic types: skip-tooth and gap-tooth. Skip-tooth sprockets only engage the chain on every other pin, and place more wear on the sprocket but less wear on the chain. Gap-tooth sprockets are specialty fabricated roller chains with attachments. Sprockets differ in design, so it’s important to choose the right one for the specific job at hand.
A bicycle sprocket should have at least 17 teeth. The more teeth the sprocket has, the longer its chain life and wear resistance. The teeth are made of the same material as the sprocket, although a plastic insert can be cheaper. Often, teeth are hardened to increase sprocket life. Flame hardening and induction hardening are two methods of doing this.
Chain-driven movement systems depend on sprockets to reduce the speed of the movement. The right sprocket can help avoid damage to equipment, so choosing the right one is vital. Whether it’s a motorcycle or a bicycle, choosing the correct sprocket depends on the type of assembly and system used. You need to know the specifications of the system and assembly before you purchase a new one.
While sprockets are generally designed to transfer rotational energy, their exact size can vary greatly. In some cases, the sprocket’s pitch corresponds to the chordal distance between adjacent chain pin centers. A sprocket’s pitch can affect the speed ratio, but these earlier uses are considered archaic. If you’re considering buying a new bike, be sure to consult with your local bicycle shop for the correct sprocket.
While most sprockets are sized to suit specific bike chains, you should also be aware of the pitch size and tooth pitch of the sprocket. Pitch is the distance between the center of the roller and the sprocket hub. Most popular chain sizes have a 3/8″ or 1/2 inch pitch. These are two common sizes to consider, and there are many other factors to consider when purchasing one.
The sprockets are usually milled or forged. Custom-made ones may be flame-cut. Whether you’re looking for a single-strand sprocket or a triple-strand one, a split body will make assembly easier. For smaller circumference sprockets, a plate body is more common. The diameter of a sprocket plate without teeth is called the caliper diameter. Type C and Type B sprockets may have a flanged hub and are called hub-style sprockets.