Rotary damper selection guide

Find the suitable product for your purpose.

Select the rotary damper by the movement

TOK rotary dampers have 4 types of motion.

Horizontal use

Select the rotary damper by the movement - Horizontal use

Horizontal & Vertical use

Select the rotary damper by the movement - Horizontal & Vertical use

Vertical use

Select the rotary damper by the movement - Vertical use

Continuous rotation

Select the rotary damper by the movement - Continuous rotation

More details about relationship between motion and torque

Select the rotary damper by the torque

Calculating based on the lifting force & length of application

Select the rotary damper by the torque - Type1

T [N·m] = F x ℓ
T  : Torque [N·m]
ℓ  : Length from the fulcrum to the end [m] 
F  : Lifting force at the lid end [N]

Example) Required torque for F: 2.0 N and ℓ: 0.5 m
T = 2.0 x 0.5 = 1.0 N·m

Calculating based on the weight & gravity center of application

Select the rotary damper by the torque - Type2

T [N·m] = m x g x ℓ
T  : Torque [N·m]
m: Mass [kg]
g: Gravitational acceleration is defined as 9.8 m/s2
ℓ: Length from the fulcrum to the gravity center [m]

Example) Required torque for m: 0.408 kg and ℓ: 0.25 m
T = 0.408 x 9.8 x 0.25 = 1.0 N·m

Calculate torque from the weight of the shutter (falling object)

T [N·m] = m x g x ℓ
T  : Torque [N·m]
m: Mass [kg]
g: Gravitational acceleration is defined as 9.8 m/s2
r: Gear (P.C.D.) radius (in)

Example) Calculate the damping torque required to slowly lower a 0.7 kg shutter using the TD88 series
m = 0.7[kg], g = 9.8[m/s²], r = PCD÷2 = 8.8÷2 = 4.4[mm]
T = m･g･r = 0.7[kg] × 9.8[m/s²] × 4.4[mm] = 30 mN･m

Calculations

Select the rotary damper by the design

You can select a product from the outer diameter.

Select the rotary damper by the design - type1

Select the rotary damper by the design - type3

Select the rotary damper by the design - type2

Select the rotary damper by the design - type4