Lens Retaining Ring Torque Preload Calculator

Optomechanics & Lens Mounting: Calculate required axial retention preload ($F_{axial}$) against shock/vibration and convert to assembly tightening torque ($T$).

Lens Mass & Shock Acceleration

Lens Mass $m$ (grams):

Peak Shock Acceleration $a$ (g):

Safety Factor $SF$:

Thread Pitch Diameter $d_p$ (mm):

Thread Pitch $p$ (mm): Fine pitch: 0.5 to 0.75 mm

Friction Coeff $mu$ (threads & face):

Preload Force & Required Assembly Torque

Required Preload ($F_a$)

-- N

Tightening Torque

-- N·m

Torque (N·cm)

-- N·cm

Contact Line Force

-- N/mm

English Units: -- in·oz (-- in·lb)

Preload Linearity: ~--% converted to axial clamping (rest lost to friction)

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Lens Retaining Ring Torque Preload Calculator

Lens Mass & Shock Acceleration

Preload Force & Required Assembly Torque

Frequently Asked Questions