How to correctly install your Vlier Plunger?

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How to correctly install your Vlier Plunger? 

Select the contact angle which provides the desired relationship between plunger side (disengagement) force and end force.

SOLVE THE EQUATION: FS = FE (Tan Ω)

Example:

  1. Given:

 

FE= 10 pounds from catalog for S58 at midway travel

Angle Ω = 30° from layout

2. Solution:

Tan 30° = 0.58

Substitute in above equation:

FS = FE (Tan Ω) = 10 (0.58) = 5.8 pounds

 

Variables:

FE = End force

FS = Side Force

Ω = Contact angle

β = Countersink angle

FR = Resultant force

L = D/2(1-cos Ω) = distance from load contact point to end of plunger/ball

D = Plunger/Ball diameter

DD = Detent hole diameter

C = Full travel (stroke)

HD = Countersink min. depth

B = C-L = distance from body to load contact point

* Equation and diagram omit frictional forces.

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