Explanation of the designations

Designation

Explanation

α

Application angle of the radial load

°

f₁

Altitude factor (= correction factor for calculation of the thermal rating of the gear unit)

–

F_A

Axial load

kN

F_R

Overhung load

N

F_R1

Overhung load on HSS (Distance from the shaft shoulder must be given)

kN

F_R2

Overhung load on LSS (Distance from the shaft shoulder must be given)

kN

F_S

Service factor = M_N2/M_K2 = P_N1/P_K1

–

F_{S min}

Application-specific service factor

–

f_z

Transmission element factor

–

η

Efficiency

–

H

Installation altitude above sea level

m

HSS

High-speed gear shaft (usually input shaft)

–

f₁

Altitude factor

–

f_t

Thermal factor

–

f_rev

Reversing factor

–

i

Gear ratio

–

i_ex

Exact gear unit ratio

–

i_N

Nominal gear unit ratio

–

LSS

Low-speed gear shaft (usually output shaft)

–

L_{h min}

Required bearing service life

h

M_K1

Input torque (= Operating torque on HSS)

kNm

M_{K1 max}

Peak input torque (= peak operating torque at HSS)

kNm

M_K2

Output torque (= Operating torque on LSS)

kNm

M_{K2 max}

Peak output torque (= peak operating torque at LSS)

kNm

M_{K2 per}

Permitted peak output torque

kNm

M_M

Nominal motor torque

kNm

M_N2

Nominal gear unit torque

kNm

n₁

Input speed (HSS)

min^-1

n₂

Output speed (LSS)

min^-1

n_M

Motor speed

min^-1

P_K1

Operating power on HSS

kW