Drive and gear unit selection data

Determining application data

First, you require the data of the machine to be driven (mass, rotational speed, setting range, etc.) to select the correct drive. This data helps determine the required power, torque, and speed. Refer to the documentation "Drive Engineering – Practical Implementation – Project Planning for Controlled and Non-Controlled Drives" or the "SEW-Workbench" project planning software.

Selecting the correct drive

Calculate the power, rotational speed, torque, and overhung load of the drive. Observe all mechanical requirements. The suitable drive can then be determined.

Motors with adapter

As the motor dimensions are not standardized, the following motor data must be known to select the appropriate adapter:

Shaft diameter and length
Flange dimensions (edge length, diameter, centering shoulder, and hole circle)
Maximum torque

Contact SEW‑EURODRIVE if you have any questions on selection and project planning.

Application data required for project planning:

Designation	Meaning	Unit
F_A_a	Axial load (tension and compression) on the output shaft	N
f_line	Line frequency	Hz
F_Ra	Overhung load acting on the output shaft	N
h	Installation altitude	m above sea level
IP..	Degree of protection	–
J_L	Mass moment of inertia to be driven	10^-4 kgm²
M_a at n_amax	Output torque at maximum output speed	Nm
M_a at n_amin	Output torque at minimum output speed	Nm
M_B	Required braking torque	Nm
n_amax	Maximum output speed	min^-1
n_amin	Minimum output speed	min^-1
P_a at n_amax	Output power at maximum output speed	kW
P_a at n_amin	Output power at minimum output speed	kW
R, F, K, S, W M1 – M6	Required gear unit type and mounting position	–
S.., ..% ED	Operating mode and cyclic duration factor cdf – the exact load cycle can be entered instead	–
T_amb	Ambient temperature	°C
U_B	Brake operating voltage	V
U_Mot	Motor operating voltage	V
Z	Switching frequency – or exact load cycle can be specified	h^-1
For inverter operation: required control mode and setting range.