Bolt diameter calculation

Force, N =
Bolt material yield strength, MPa =
Allowable voltage factor (0.2 ... 0.3) =
Number of bolts, pcs =
Number of cut planes, pcs =
Bolt diameter, mm =

With this online calculator you can calculate the bolt diameter under shear load.

Formula:

d = √ (4*S/(π*i*z*τ_a))

d - bolt diameter, mm
S - force, N
i - number of cut planes, pcs
z - number of bolts, pcs
τ_a - bolt material yield strength, MPa

A bolted connection is a detachable fastening threaded connection for fastening two or more parts with bolts.