Belts Flashcards

1
Q

Advantage of having a cogged belt?

A

They are more flexible and will wrap around small pulleys easier

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2
Q

3 types of v-belts?

A

Classic, wedge and fractional HP

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3
Q

3 types of belts?

A

V-belts, flat belts and toothed belts.

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4
Q

2 construction types for belts?

A

Raw edge and envelope

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5
Q

How do you know if the belt has a raw edge?

A

You can see the tensile cord on the side of the belt.

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6
Q

Why would you want to use envelope instead of raw edge?

A

Envelope will give the belt better protection from the elements.

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7
Q

The 2 components turning a belt are known as what?

A

The driver (smaller) and the driven (bigger)

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8
Q

The driven is always a what?

A

A pulley

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9
Q

The driver is the only one that changes, there are 3 types for v-belts, toothed and flat belts, what are they?

A

V belts - sheave
Flat belts - drum style
Toothed belts - sprocket

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10
Q

Advantages of flat belts?

A

They are flexible and can easily go around corners

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11
Q

Disadvantages of flat belts?

A

High tension

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12
Q

Biggest advantage that belts have over other drive types?

A

They act as a cluth to the system preventing catastrophic failure

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13
Q

How to know what the slack side is?

A

The side that is being pushed

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14
Q

How to know what the tension side is?

A

The side that is being pulled

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15
Q

What are the 4 parts of a v-belt?

A
  1. Cushion rubber
  2. Tensile cord
  3. Insulation rubber
  4. Backing fabric
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16
Q

How much deflection should you have in the slack side?

A

¼ per foot between each pulley

17
Q

Advantages of wedge belts?

A

Provide more contact with the sheave and provide more support in the center of the belt

18
Q

Fractional hp belts are designed to operate drives…..

A

Less than one hp

19
Q

Timing belts do not use friction to transmit torque they rely on what?

A

Positive engagement of belt teeth with teeth of sprocket