Chain me up
Roller chains use _______________ friction between the roller and sprocket teeth; to reduce wear.
Rolling friction
______________ is a plain sprocket without a hub and is normally welded to the shaft.
Type A Sprocket
What is the recommended stretch point to replace your chain at? (Expressed as a "%")
1 - 2% depending on operating speed, conditions and importance of the machine
What is the advantage of having a double pitch chain sprocket with an odd number of teeth?
Wear is distributed over twice as many teeth (longer service life)
How do silent chains differ from roller chains
Silent chain uses teeth and has no sliding action
Double Pitch Roller Chain with 1” pin distance is designated by ______________.
2040
Why is it better not to use automatic take-ups when using idler sprockets?
It causes extra unwanted wear
The minimum wrap angle that is recommended to carry the full load for which the chain is designed is?
120 degrees
If extra-long distances between shaft centers are UN-avoidable for driving the chain, __________ may be used at the center of the span?
Countershaft (jackshaft)
If the letter h follows the chain number it denotes what
Heavy series
To increased power capacity without the need for increasing the chain pitch or its linear speed, what can you use?
Multiple strand roller chains
How much sag should a chain have on the return side?
2% of length between sprocket centers
When would you use a "hunting link" on a silent chain?
when an odd number of pitches is required
How much longer do chain drives last compared to gear drives?
They tend to have a SHORTER service life
What condition could result from unevenly tightening the bolts on a tapered bushing adapter
Run out
Double cut sprocket means there are _____________.
Two teeth per link
When ordering a sprocket, what do you specify? Name all 4
Chain pitch, Chain type, Number of stands, Hub style
Sprocket Sizing, What does "D 60 A 16" indicate?
Double stranded, 3/4", A-hub type, 16 tooth sprocket
What kind of chain runs on sheaves instead of sprockets?
Leaf chain
A roller chain can consist of several types of links? Name 4
Roller links
Pin links
Connecting links
Offsets links
In Silent Chains are quiet, due to the compliance of individual links because there is _________________.
Less impact force
Two pitch offset links are designed for ___________ applications?
High speed OR heavy service
Silent chain sprockets have what tooth profile?
Involute
How does the life of a sintered bushing chain compare to the life of a standard roller chain?
Sintered bushing chain typically lasts 5x longer than a standard roller chain
The amount of the gear tooth above the pitch circle is called the?
Addendum.