Mechanics Chains Quiz Flashcards
How do chain drivers operate?
Tension
What are the advantages of chain drives?
- Versatility - Easily adjustable length
- Variety - Limitless Variations (Styles, spacing, and materials)
- Flexibility - Ability to bend back while maintaining positive engagement.
- Durability - Long operating life
- Can Operate in Hostile Environments - Withstand heat, water, oil, corrosion, etc
- Unlimited Shelf Life - Little to no deterioration
- Generally can be replaced without disturbing other components
- Large HP loads/speeds - Large load on large pitch, faster speed on small pitch
What are the disadvantages of chain drives?
- Loud as fuck
- Chains wear and elongate over time
- Lower speed on large pitch chains
- Sprockets tend to need replaced
In chain nomenclature, what does 0 denote? (For example, 50)
Normal weight
In chain nomenclature, what does 1 denote? (For example, 51)
Light weight
In chain nomenclature, what does 2 denote? (For example, 52)
Large roller
In chain nomenclature, what does 5 denote? (For example, 25)
No roller (Only typical of chains below 1/2 pitch)
In chain nomenclature, what does -# denote? (For example, 50-2)
Stranded chain/amount of strands (2 in this case)
In chain nomenclature, what does 20 – denote? (For example, 20 50)
Double pitch
In chain nomenclature, what does H denote? (For example, 50H)
Heavy (Link plate is same thickess as the next chain size up)
In chain nomenclature, what does C denote? (For example, C20 50)
Conveyor
In chain nomenclature, what does 3## denote? (For example, 300 50)
Stainless (Corrosion resistant, but not harder)
In chain nomenclature, what does 6## denote? (For example, 600 50)
Hardened and Corrosion Resistant
In chain nomenclature, how do you determine size? (For example, 50)
1st number out of 8 (excluding prefixes such as 300, 600, 20, and C). For this example, the chain is 5/8in
What is chain pitch?
The distance between flexing joints.
How are chains connected?
Either Connecting/Master Links or Offset/Half Links
What are Connecting/Master Links used for?
Even number of teeth on sprocket.
What are Offset/Half Links used for?
Odd number of teeth on sprocket.
How are the chain connectors held on?
Spring clip or cotter key/pin.
Which clip/pin is required for motion in both directions?
Cotter key/pin
Should you add lube to a self lubricated chain?
No.
How are heavy chains different?
The link plate is 1 size thicker. In other words, the link plate is the same thickness as the next chain size up.
Why would we use heavy chains?
When we need more shock load capabilities but have space limitations.
How are double pitch chains constructed?
Half the rollers, with double the link plate length.
