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Triangular Clamping Toggle Design Formula and Calculator

Machine Design Application, Equations and Calculators

Triangular Clamping Toggle Mechanism Design Formula and Calculator

Triangular Force Reducer arm clamp design with forces applied and reaction forces calculator.

Preview: Triangular Clamping Toggle Mechanism Calculator

Eq. 1
Q = P [ ( l + h · f + r · f_o ) / ( l₁ - h₁ · f₁ - r · f_o ) ]

Eq. 2
P = Q / [ ( l + h · f + r · f_o ) / ( l₁ - h₁ · f₁ - r · f_o ) ]

When
l₁ ≥ l and P ≥ Q

Figure 1
Triangular Clamping Toggle Design

Where:

Q = force applied to handle. lbf, (N)
P = clamping force, lbf. (N)
f = coefficient of friction of contact surface = 0.1 to 0.15
f_o = coefficient of friction (axles and pivot pins) = 0.1 to 0.15
f₁ = coefficient of friction of pin contact surface = 0.1 to 0.15
l, l₁ = length as indicated. in, (mm)
h, h₁ = distance as indicated. in, (mm)
r = radius of pivot hole. in, (mm)

Reference:

Handbook of Machining and Metalworking Calculations
Ron A. Walsh
2001

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