Chains&Sprokets Flashcards
What are the two main designs of power transmission chains
Roller and silent chain
Power transmission chains are used as what kind of drive to transmit power between widely spaced shafts
Positive drive
Are the two basic types of links on a roller chain
Pin links and roller links
Two types of connecting links
Cotter pin and spring clip
What kind of chain is better for shock load
Heavy-duty chain
What kind of chain is used in agriculture business and electro mechanical devices
Light duty chain
Multiple strand chain consists of how many Single strand chains assembled on common pins
Multiple strand chain consists of two or more Single strand chains
What kind of chains are designed for applications that do not permit regular lubrication
Pre-lubricated chain
What kind of steel is used in corrosion resistant chain
Stainless steel
What kind of applications are synthetic chains used for
Food handling and processing equipment
computer equipment
office machines
instrument drives
What kind of lubrication is required in synthetic chain
No lubrication is required
What are some advantages of silent chain
High-efficiency and high horsepower
High speed performance
Positive Drive
What are some ways of removing old chain
Chain breaker
torch or
grinder
What kind of plate is more convenient to install but reduces the working capacity of the chain by 30%
The slip fitted plate
What is the correct way to install a spring clip
The closed end must be installed in the direction of the rotation
Referring to chain tension too much tension can cause what to happen
Reduced chain and sprocket life
over load the bearings on the driver and the driven
inadequate lubrication in the pins and bushings
If you have too little tension what can happen
Chain whip and vibration
chain sagging
chain wrap up
What can be a cause of pin failure
Lack of lubrication
What is one way the chain can be elongated
Stretch due to overload
What are toothed wheels that are designed to mesh with power transmission chains
Sprockets
What is the minimum wrap angle that is recommended to carry a full load for which the chain is designated
120°
However at what angle can a chain be designated to carry a full load if proper chain tension occurs and is closely maintained
90°
Double pitch chain sprockets may have what required to fit between the link of a double pitched chain
Two times the number of teeth
Hunting tooth sprockets have what
Odd number of teeth
What kind of sprockets are common and intended for greater wear resistance
Hardened tooth sprockets
Hub style sprockets are classified as type…..
A, B, C or D
Does a type A sprocket come with or without a hub.
Without a hub
mounted onto any style hub with bolts
Type B sprocket is a one-piece sprocket and hub on one side how should you mount this on a shaft
You should have the sprocket mounted closest to the bearing and the hub away from the bearing
What allows a type C sprocket to provide more stability and add support to sprockets with large diameters
Hubs on both sides
Explain the type D sprocket design
It is a split design bolted together
What kind of hub provides the sprocket drive with overload protection in case of a jam
Shear pin hub
What is a common rule when replacing a shear pin on a shear pin hub
To change a shear pin with one that has the same shear value
