belts A Flashcards

1
Q

How do v bend transmit power?

A

By the grip on the side’s of the the sheave groove.

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2
Q

What is the purpose of the tensile members in a belt?

A

They carry the load.

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3
Q

What 2 safety precautions should you take before you begin work on a belt?

A

De-energize, lock out.

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4
Q

List 2 main reasons for cleaning sheeves?

A

To inspect for cracks, for dynamic balance.

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5
Q

What are two main reasons for using bent drive instead of chain ?

A

No lubrication is required, they are the most cost effective means of power transmission.

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6
Q

In which application would you find a link belt?

A

They can be installed in places where it is difficult or impossible to install endless belts.

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7
Q

Tensile members do what?

A

Consist of cords that carry the load.

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8
Q

Compression martial does what?

A

Transmits the power between the sheave and the tensile member and supports the cords.

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9
Q

The cover does what on the belt?

A

Protects the internal parts from wear, weather, and harmful substance.

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10
Q

The amount of power a belt can transmit depends on what?

A

The arc of contact.

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11
Q

Friction depends on what factor?

A

Coefficient of friction.

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12
Q

Four variations were developed from standard classical series they are?

A

Cogged raw edge ax bx cx. Banded, joined classical B,C,D. Double v AA,BB,CC. fractional horsepower 2L,3L,4L,5L,

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13
Q

Cogged raw edge belts cannot be subjected to reverse bending true or false?

A

True

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14
Q

12 28 V 255 belt means what?

A

12= top width 12/16=3/4. 28° groove angle. V v shape. 255 pitch length 25.5”

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15
Q

Open end belts have the following limitations?

A

They can carry only 1/3 of the load of a corresponding endless belt.

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16
Q

How do v belts transmit power?

A

By the grip on the side’s of the the sheave groove.

17
Q

3 linked belt limitations?

A

They cannot be used with back idler, they cannot be used with endless belts, they generate more vibration than endless belts.

18
Q

3 linked belt limitations?

A

They cannot be used with back idler, they cannot be used with endless belts, they generate more vibration than endless belts.

19
Q

Do not use idlers on _____ drives?

A

Reversing