A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is τ. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be

Machine Design
A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is τ. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be

τ

τ/2

4 τ

2 τ

τ

τ/2

4 τ

2 τ

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Machine Design
The constant factor in case of R10 series of preferred numbers is

1.06

1.58

1.12

1.26

1.06

1.58

1.12

1.26

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Machine Design
When spring index increases, the value of Wahl's stress factor

Increases linearly

Remains same

Increases exponentially

Decreases linearly

Increases linearly

Remains same

Increases exponentially

Decreases linearly

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Machine Design
In order to permit the thermal expansion/contraction of tubing, it should be

Flared

Honed

Bent

Crimped

Flared

Honed

Bent

Crimped

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Machine Design
Antifriction bearings are

Hydrodynamic bearings

Thin lubricated bearings

None of these

Sleeve bearings

Hydrodynamic bearings

Thin lubricated bearings

None of these

Sleeve bearings

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Machine Design
For hardening alloy steels and high speed steels, they are heated to

700 to 900°C

1300 to 1500°C

1100 to 1300°C

500 to 600°C

700 to 900°C

1300 to 1500°C

1100 to 1300°C

500 to 600°C

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Machine Design

Machine Design The constant factor in case of R10 series of preferred numbers is

Machine Design When spring index increases, the value of Wahl's stress factor

Machine Design In order to permit the thermal expansion/contraction of tubing, it should be

Machine Design Antifriction bearings are

Machine Design For hardening alloy steels and high speed steels, they are heated to

Machine Design
The constant factor in case of R10 series of preferred numbers is

Machine Design
When spring index increases, the value of Wahl's stress factor

Machine Design
In order to permit the thermal expansion/contraction of tubing, it should be

Machine Design
Antifriction bearings are

Machine Design
For hardening alloy steels and high speed steels, they are heated to