Module - Shafting, Fits & Accessories. Flashcards

1
Q

__________ are designed to be the weak link in the mechanism.

A

Keys are designed to be the weak link in the mechanism.

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2
Q

What is the recommended width of key relative to the shaft diameter?

A

The recommended width of a square or flat key is approximately 1/4 the diameter of the shaft.

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3
Q

A #608 Woodruff key is __________ wide and __________ in diameter.

A

A #608 Woodruff key is 3/16” wide and 1” in diameter.

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4
Q

How is a gib head key removed from a hub?

A

A gib head key can be taken out by driving a wedge between the gib and the face of the hub.

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5
Q

To secure a pillow block bearing on a shaft, which way do you rotate the eccentric locking collar before locking it?

A

You rotate the eccentric locking collar in the direction of shaft rotation.

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6
Q

What is the purpose of a floating bearing on a line shaft?

A

The purpose of a floating bearing is to keep the shaft aligned while allowing for shaft expansion.

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7
Q

Where should the fixed bearing on a line shaft be located?

A

The fixed bearing should be located next to the main drive.

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8
Q

Do split locking collars locate a shaft in a coupling radially or axially?

A

axially

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9
Q

Taper pins have a/an __________ inch taper per foot.

A

Taper pins have a 1/4-inch taper per foot.

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10
Q

What are the two main stresses to which shafts are subjected?

A

torsional stress

bending stress.

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11
Q

How could bending stresses on shafting be kept to a minimum?

A

Keep the loads close to the bearings.

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12
Q

What is the principal hardening element in steel?

A

carbon

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13
Q

Lead improves the _______________________ of a steel.

A

Lead improves the machinability of a steel.

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14
Q

What does AISI stand for?

A

the American Iron and Steel Institute

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15
Q

What does SAE stand for?

A

the Society of Automotive Engineers

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16
Q

What is the carbon content of the steel AISI 4340?

A

The carbon content in AISI 4340 is 0.40%.

17
Q

What is the tolerance of a shaft with a permitted size variation from 6.125 inches to 6.129 inches?

A

The tolerance is 0.004 inch.

18
Q

If a 4-inch shaft has a tolerance of ± 0.004 inches and the mating hub has a bore of 3.995 inches with a tolerance of 0.000 inches to 0.004inches, what is the type of fit?

A

It is an interference fit.