Shear Pin Diameter Calculator

Inputs

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Total load the pin must carry.
N
Material allowable shear stress before applying the safety factor. If already derated, set safety factor to 1.
MPa
Single shear = 1 plane; double shear = 2 planes, as in a clevis.
planes
Design shear stress is allowable shear stress divided by this factor.

Results

Default result
Edit inputs
Required pin diameter(d)
10.3mm
Pass

2 shear planes; round up to a standard pin size.

Round up to the next available pin diameter.

Also computed

Load per shear plane(F/n)5,000N

5 kN · 1,124 lbf

Design shear stress(tau_d)60MPa

allowable shear / safety factor.

Area per plane(A)83.33mm²

Total shear area(nA)166.7mm²

Method notes 3 notes
  • Average pin shear stress is tau = F/(n*A), where A = pi*d^2/4 and n is the number of shear planes.
  • Solving for diameter gives d = sqrt(4F/(pi*n*tau_d)), with tau_d = allowable shear / safety factor.
  • This checks direct shear only. Pin bending, hole bearing pressure, edge distance, shock loading, fatigue, fit/clearance and retaining hardware need separate checks.

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