Coupling size selection

In order to dimension the HXP flexible couplings for continuous operation regimen, you should first obtain the operation torque (T₀ ), which is found by: ₀ ), which is found by:

T_{0 = C x P ⁄ nm where:}

T₀ = System operational torque [Nm];

P = Input power [kW or HP];

n_m = Rotation speed [rpm];

C:

C = 9550 for P in kW;

C = 7030 for P in HP;

Once you find the operational torque, you can obtain thecoupling’s nominal torque which is found by: (T _na ) which is found by:

T_na ≥ T₀ x f₁

Where:

T_na = Coupling’s nominal torque

f₁ = Service factor

Important remark: These couplings were dimensioned to withstand start up and braking at a maximum torque of up to three times the nominal torque of the coupling. These operations can be repeated 25 times per hour. However, should the coupling be submitted to loads involving shocks, the following equation must be considered:

T _{na max} = Coupling’s maximum torque;

T_s = Maximum impact torque of the system.

Service factor

The service factor is a number obtained empirically that takes into account the operating regimes of the driving and driven machines. The table bellow indicates the service factor considering the driven machine regimen and the drive type. In order to simplify the service conditions they were divided into three groups:

1. 1 – With uniform load
2. 2 – With medium shocks
3. 3 – With strong shocks

Dimensional table

Sizes 4 to 14

Click here to download the dimensional table

Sizes 16, 18 e 20

Click here to download the dimensional table

Sizes 22 to 79

Click here to download the dimensional table

Material, phisical characteristics and application of elastic elements

Type	Material	Hardness	Temperature range	Selection criteria	Field of application
Pattern	Perbunan Black	80 Shore	From -30 °C To +80 °C		Every actuation application in engineering field mechanical
Special type request	Perbunan Black	60 Shore*	From -30 °C To +80 °C	hange speed resonance by changing the dynamic torsional stiffness
	Natural rubber Black	80 Shore	From -50 °C To +50 °C	Change the temperature range for use in low temperature.
	Perbunan Green	80 Shore	From -30 °C To +80 °C	Electrical insulator

*Torque reduction due to hardness must be considered

Balancing

The hubs balancing of Henflex HXP couplings are in accordance with the NBR 8008 norm.

For n = 1500 RPM or peripheral speed = 30m/s, do the balancing on one plan with G16 quality.

For n> 1500 RPM or peripheral speed >30m/s, do the balancing on both plans with G6,3 quality.

The hubs are supplied balanced whenever the operational rotation informed is within the balancing region on the graph below:

Attention: Always check the admissible rotation on the dimensional table.