Lust CDA3000 - Characteristic Values of Standard Gears; Characteristic Values of Planetary Gears

Engineering Guide CDA3000
2-49
2 Drive definition
DE
EN
1
2
3
4
5
6
7
A
2.6.2 Characteristic
values of
standard gears
2.6.3 Characteristic
values of
planetary gears
Characteristics
Spur
gear
Flat spur
gear
Worm
gear
Bevel gear
Magnetic flux straight straight rectangular rectangular
Max. torque [Nm]
approx.
15,000
approx.
6,000
approx.
4000
approx.
40,000
2nd shaft end not possible possible possible possible
Hollow output shaft not possible possible possible possible
Reduction range
(without compound
transmission)
approx.
3.5 to 230
approx.
6 to 270
approx.
6 to 290
approx.
6 to 165
Efficiency 0.93 to 0.98 0.93 to 0.98 0.3 to 0.85 0.9 to 0.96
Circumferential back-
lash in
1)
angle minutes
approx.
30 to 40
approx.
30 to 40
approx.
30 to 40
approx.
25 to 40
Reduction mathema-
tically
2)
precise?
(rating plate)
no no no no
Cost DM/Nm low low medium relatively high
1)
For explanation See section 2.6.3
2)
The cogs of the cogwheel pairing have common dividers so that different cogs always
engage with each other.
Example: i = Z2/Z1 = 96/16 = 5.9375
⇒
Catalogue specification 5.94
Table 2.15 Characteristic values of standard gears
Characteristics Standard gear Planetary gear Bevel gear
Gear stages 1/2/3 1/2 1/2
Efficiency
(without worm gear)
very good very good very good
Circumferential backlash
in angle minutes
approx. 25 to 40 1 to 10 6 - 15
Impulse torques poor very good poor
Torsional rigidity medium very good medium
Dynamics medium very good medium
Power density poor very good poor
Transmission math.
precise? (rating plate)
no yes yes
Cost DM/Nm low relatively high medium
Table 2.16 Characteristic values of planetary gears