top of page

Sizing Industrial Shock Absorbers for Cylinder-Driven
Vertical Rotating Arm (Pull Type) with Load Opposing Gravity

In applications where a vertical rotating arm is driven upward by a hydraulic or pneumatic cylinder in pull mode—moving a load that resists gravity—substantial kinetic energy builds up and must be absorbed safely to prevent equipment damage. At Shockbuffer, we specialize in industrial shock absorber selection and precise sizing of shock absorbers for these complex upward-moving systems. Our medium industrial shock absorbers are engineered to handle the dynamic forces created by pulling a load against gravity, delivering smooth deceleration, reducing vibration, and protecting machinery. Choosing the right shock absorber for machinery ensures safer operation, better process control, and longer service life.

Formulae

I = W · K²

T = ((0.78 ·D  ) - (0.78 ·DR  ))·p· Rc

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

2

2

2

Example: Sizing Industrial Shock Absorbers for Cylinder-Driven Vertical Rotating Arm (Pull Type) with Load Opposing Gravity

D = 0.060 m

DR = 0.0254 m

p = 550000 Pa

Rc = 0.30 m

W = 70 kg

K = 0.7 m

Rs = 0.60 m

ω = 3 rad./sec

α = 30°

s = 0.050 m

c = 100 / hr

I = 70 · 0.7  = 34 kg-m

T=((0.78· 0.060  )-(0.78· 0.0254  ))·550000·0.30 = 380 N

F = (380 - ( 70 · 0.7 · 0.5 )) / 0.6 = 593 N

E1 = 0.5 · 34 · 3  = 153 Nm

E2 = 593 · 0.050 = 30 Nm

E3 = 153 + 36 = 183 Nm

E4 = 183 · 100 =18300 Nm/hr

VS = 0.6 · 3 = 1.8 m/s

We = (2 · 183 ) / 1.8  = 113 kg

2

2

2

2

2

2

Cylinder-Driven Vertical Rotating Arm (Pull Type) with Load Opposing Gravity

Model choosen -SBN-M33x1.5S50H3

Application of Industrial Shock Absorbers

 

Typical shock absorber applications in this category include:

​

  • Pull-type cylinder-driven pivot arms lifting heavy parts or fixtures upward

  • Vertical lifting fixtures in assembly lines moving products to higher workstations

  • Automated systems rotating pallets or frames upward into processing positions

  • Material handling arms raising containers or tools against gravitational force

  • Robotic loaders pulling components up to elevated assembly or packaging areas

  • Production cells where large panels are lifted vertically with pull cylinders

 

In each case, a medium industrial shock absorber must be correctly sized to absorb the kinetic energy from the upward motion opposing gravity, ensuring smooth, controlled stops and protecting machinery from shock and excess wear.

Technical Query Form

DOWNLOAD

Have more questions? Email us at info@shockbuffer.com

bottom of page