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### Work Holding Toggle Mechanism Calculations

Machine Design Application, Equations and Calculators

Work Holding Clamping Toggle Mechanisms Calculations

Basic lever arm clamp design with forces applied and reaction forces calculator.

Preview: Work Holding Clamping Toggle Mechanisms Calculator

*Eq. 1
Q = P [ ( l + r · f _{o} ) / ( l_{1} - r · f_{o} ) ]*

*Eq. 2
P = Q / [ ( l + r · f _{o} ) / ( l_{1} - r · f_{o} ) ]*

Figure 1

Basic lever arm clamp design

Where:

Q = force applied to handle. lbf, (N)

P = clamping force, lbf. (N)

*f _{o}* = coefficient of friction (axles and pivot pins) = 0.1 to 0.15

*l, l*= length as indicated. in, (mm)

_{1}r = radius of pivot hole. in, (mm)

Reference:

Handbook of Machining and Metalworking Calculations

Ron A. Walsh

2001

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