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Sizing Industrial Shock Absorbers for
Motor-Driven Vertical Rotating Arm with Load Assisted By Gravity

When a vertical rotating arm moves downward with the load assisted by gravity, it accelerates quickly and builds substantial kinetic energy that must be safely absorbed to protect machinery. At Shockbuffer, we specialize in industrial shock absorber selection and precise sizing of shock absorbers for gravity-assisted downward rotation, ensuring smooth deceleration and reduced impact forces. Our medium industrial shock absorbers are designed to handle the dynamic loads created in these applications, preventing vibration, minimizing wear, and extending equipment life. Choosing the right shock absorber for machinery keeps automated processes reliable, safe, and maintenance-friendly.

Formulae

I = W · K²

F = (T + (W · K · sin α) )/ Rs

E1 = 0.5 · I · ω²

E2 = F · S

E3 = E1 + E2

E4 = E3 · c

Vs = Rs · ω

We = (2 · E3) / Vs

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Example: Sizing Industrial Shock Absorbers for Motor-Driven Vertical Rotating Arm with Load Assisted By Gravity

W = 150 kg

K = 0.9 m

Rs = 0.7 m

ω = 3 rad./sec

α = 40°

T = 280 N·m

s = 0.050 m

C = 150 / hr

I = 150 · 0.9   = 121 kg-m

F = (280 + ( 150 · 0.9 · 0.75 )) / 0.7 = 544 N

E1 = 0.5 · 121 · 3  = 544 Nm

E2 = 544 · 0.050 = 28 Nm

E3 = 544 + 28 = 572 Nm

E4 = 572 · 150 = 85800 Nm/hr

Vs = 0.7 · 3 = 2.1 m/s

We = (2 · 572 ) / 2.1  = 286 kg

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Motor-Driven Vertical Rotating Arm with Load Assisted By Gravity

Model choosen -SBN-M33x1.5S50H3

Application of Industrial Shock Absorbers

 

Typical shock absorber applications in this category include:

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  • Motor-driven pivot arms lowering parts or tools into fixtures or conveyors

  • Rotary loaders moving heavy items from elevated positions to workstations

  • Automated systems rotating pallets or containers downward into place

  • Gravity-assisted vertical indexing arms used in assembly or packaging lines

  • Powered tilting fixtures that lower large panels or frames into processing stations

  • Downward rotating robotic arms handling bulky or heavy components

 

In each case, a medium industrial shock absorber must be sized accurately to absorb the kinetic energy generated by gravity-assisted downward motion, ensuring controlled stopping and protecting the machine structure from excess shock and stress.

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