Abbreviations and descriptions

Characteristic curve for continuous duty

–

–

The red characteristic curve for continuous duty is used for project planning. The project planning rule prescribes that the operating point of a cycle (M_{a_kub}) must be lower than the characteristic curve for continuous duty.

Characteristic curve for short-time duty

–

–

The blue characteristic curve for short-time duty is used for project planning. The project planning rule prescribes that the black characteristic curve of the cycle or the maximum application torque M_max must be lower than the characteristic curve for short-time duty.

Tilting rigidity

c_pr

Nm/arcmin

The tilting rigidity is the ratio of the applied tilting torque and the resulting tilting angle at the output.

Torsional rigidity

c_tr

Nm/arcmin

The torsional rigidity is the ratio of the applied output torque to the resulting torsional angle at the output when the input side is blocked.

Cyclic duration factor

cdf

%

Maximum permitted cyclic duration factor; this value refers to the time proportion at speed ≠ 0 per cycle.

Nominal axial force

F_{A_a_N}

N

Nominal axial load at the gear unit output shaft, during continuous duty, with central force application, nominal speed n_{e_N}, nominal torque M_{a_N}, gear unit service life L, and without any radial load.

Peak axial load

F_{A_a_pk}

N

Maximum permitted axial load at the output shaft of the gear unit during short-time duty, with centered force application, and without any present radial load.

Dynamic factor

f_dyn

–

The dynamic factor f_dyn is a dynamic component in drive selection and describes a torque spike during acceleration.

Maximum permitted radial load

F_{R_a_max}

N

Maximum permitted radial load at the gear unit output shaft during continuous duty. The center of the shaft end is the load application point.

Nominal radial force

F_{R_a_N}

N

Nominal radial load that occurs at the gear unit’s output shaft during continuous duty, at the force application point x = L/2 of the output-side solid shaft or x = 0 on the face end of the flange block shaft, in flange block gear units, nominal speed n_{e_N}, nominal torque M_{a_N}, gear unit service life L, without acting axial load.

Peak radial load

F_{R_a_pk}

N

Maximum permissible radial load that may occur at the gear unit's output shaft during short-time duty, at the force application point x = L/2 for solid shafts or x = 0 on the face end of the flange block shaft, in flange block gear units without acting axial load.

Information: The value is defined without any active torque and without reference to speed. The force is applied from one direction and is not circumferential.

Cubic radial load

F_{R_kub}

N

Cubic radial load at cubic torque M_{a_kub}

Maximum radial load

F_{R_max}

N

Maximum radial load at the gear unit output shaft, calculated based on the project planning of the customer application.

Transmission element factor

f_z

–

The transmission element factor when determining the radial load includes the influence of the transmission element on the output shaft of the gear unit.

Standstill current

I₀

A

Current consumed by motor to achieve standstill torque.

Maximum motor current

I_max

A

Maximum current of the motor

Mass moment of
inertia

J

10^-4 kgm²

Reduced mass moment of inertia in relation to the input side

Mass moment of
inertia of the brakemotor

J_bmot

kgm²

Mass moment of inertia of the brakemotor

Mass moment of inertia
(external)

J_ext

kgm²

Mass moment of inertia (extern) reduced to the motor shaft

Mass moment of inertia of the motor

J_mot

kgm²

Mass moment of inertia of the motor

Inertia ratio

k

–

Inertia ratio J_ext/J_mot

Service life

L

h

Gear unit service life at maximum permitted cyclic duration factor and maximum permitted cycle time, nominal output torque M_{a_N}, nominal input speed n_{e_N} and nominal overhung load F_{R_a_N}.

Inductance between connection phase and neutral conductor

L₁

mH

Inductance between connection phase and neutral conductor of motor

Standstill torque

M₀

Nm

Thermal continuous torque of the motor at low speeds

Characteristic value of the static braking torque

M_4,100°C

Nm

Statistically lowest occurring value of the static braking torque during holding brake operation, based on a friction surface temperature of +100 °C

Dynamic output torque

M_adyn

Nm

Maximum possible dynamic torque at the gear unit output taking into account the peak motor torque, the gear ratio and the gear unit efficiency

Emergency stop torque

M_{a_es}

Nm

Maximum permitted torque at the output shaft of the gear unit during emergency stop. Maximally 1000 static events are permitted during the gear unit service life L.

Cubic torque

M_{a_kub}

Nm

Effective torque (operating point) calculated during project planning

Nominal torque

M_{a_N}

Nm

Nominal torque at the gear unit output shaft, during continuous duty, at nominal speed n_{e_N}, nominal ambient temperature T_{amb_N}, maximum permitted housing temperature T_ma, and gear unit service life L.

Information: The nominal radial load or nominal axial load can apply additionally. When radial and axial forces are acting simultaneously, the catalog data becomes invalid and the combined forces must be recalculated accordingly.

Peak torque

M_{a_pk}

Nm

Maximum permitted torque at the output shaft of the gear unit during short-time duty.

Mass

m

kg

Mass of the gear unit with lubricant, including the mass of the adapter and the mounted motor with resolver, without brake.

Mass of the brakemotor

m_bmot

kg

Mass of the brakemotor

Mass of the motor

m_mot

kg

Mass of the motor

No-load torque

M_{e_0}

Nm

Mean torque occurring at the gear unit input shaft, at no-load operation, at nominal speed n_{e_N}, and at nominal ambient temperature T_{amb_N}.

Effective motor torque

M_eff

Nm

Effective torque requirement (in relation to the motor)

Maximum input torque

M_{e_max}

Nm

Maximum torque at the gear unit input shaft.

Nominal breakdown torque

M_{K_a_N}

Nm

Nominal breakdown torque during continuous duty with point of force application x = L/2 at the output shaft, nominal speed n_{e_N},, nominal torque M_{a_N},, gear unit service life L, without any axial load. The nominal breakdown torque is defined for the nominal radial load at x = L/2, which rotates around the input pressure point.

Peak tilting torque

M_{K_ap_k}

Nm

Maximum permitted acceleration tilting torque during short-time duty, with point of force application x = L/2 at the output shaft, without any axial load. The acceleration tilting torque is defined for the lateral force of acceleration at x = L/2, which rotates around the input pressure point.

Maximum torque

M_max

Nm

Maximum torque at the gear unit output shaft, calculated based on the project planning of the customer application.

Dynamic limit torque

M_pk

Nm

Dynamic limit torque of the motor

Mean output speed

n_{a_m}

min^-1

Mean speed at the gear unit output shaft, calculated based on the configuration of the customer application

Speed class

n_c

min^-1

Speed class of the motor

rms speed

n_eff

min^-1

Effective thermal speed of the motor

Nominal speed

n_{e_N}

min^-1

Nominal speed at the gear unit input shaft, during continuous duty, at nominal torque M_{a_N}, nominal ambient temperature T_{amb_N}, maximum permitted housing temperature T_max and gear unit service life L.

Peak rotational speed

n_{e_pk}

min^-1

Maximum permitted rotational speed at the input shaft of the gear unit during short-time duty.

Maximum input speed

n_max

min^-1

Maximum speed required at the motor output shaft, calculated based on the project planning of the customer application. It is calculated based on the speed at the input shaft of the customer application.

Permitted speed for brake application in the event of an emergency stop

n_max,1

min^-1

Maximum permitted speed of the brakemotor for brake application in the event of an emergency stop

Braking power

P_B

W

Braking power

Peak braking power

P_{B_pk}

W

Maximum braking power

Resistance value between connection phase and neutral conductor

R₁

Ω

Resistance between connection phase and neutral conductor of motor

Ambient temperature

T_amb

°C

Permitted ambient temperature range for operating the gear unit.

Nominal ambient temperature

T_{amb_N}

°C

Ambient temperature used as basis for calculating the permitted nominal values of the gear unit.

Gear unit temperature

T_max

°C

Maximum permitted temperature that may occur on the gear unit housing.

Cycle duration

t_z

min

Maximum permitted duration of a repetitive reference cycle; corresponds to the sum of all time components of motion and standstill.

Brake voltage

V_N

V

Nominal voltage of the brake

Internal voltage

U_{P0 kalt}

V

Voltage in motor induced into the stator winding by the exciter (magnet wheel) during no-load operation.

Rotational clearance

φ

arcmin

The rotational clearance describes the synchronism difference of both directions of rotation.

Efficiency

η

%

Efficiency of the gear unit during continuous duty at nominal output torque M_{a_N}, nominal input speed n_{e_N}, and in mounting position M1