Worm Gear Reducers (MRT) - Rotor UK

19. MRT 28 SMALL WORM GEAR UNIT
Type Identification Diagram
Example: MRT 28 with motor 30 A B3 73-4p 0,12 kW
MRT 28 worm-gear unit, gear ratio 30:1 assembly version A/B3, 63-4p, 0,12 kW electric motor with 75 mm flange
Tab. 19.1 Radial and Axial Load on Shaft
Max. permissible radial and axial load [N]
n 1
n 2
n 2
n 2
n 2
n 2
n 2
n 2
n 2
n 2
n 2
i 7.5 10 15 20 25 30 40 50 60 80.0
rpm 1400 187.0 140 93 70 56 47 35 28 23 17.5
F ax
20 130.0 150 170 180 200 210 230 250 270 290.0
F rad
100 660.0 730 840 920 990 1050 1160 1250 1330 1460.0
Max. permissible radial and axial load for taper bearings [N]
n 1
n 2
n 2
n 2
n 2
n 2
n 2
n 2
n 2
n 2
n 2
i 7.5 10 15 20 25 30 40 50 60 80.0
rpm 1400 187.0 140 93 70 56 47 35 28 23 17.5
F ax
20 160.0 170 200 210 230 240 260 280 300 320.0
F rad
100 790.0 860 980 1060 1140 1200 1310 1400 1490 1610.0
Tab. 19.2 Worm Parameters
MRT 7.5 10 15 20 25 30 40 50 60 80
m n
1.25 1.25 1.25 1.00 1.50 1.25 1.00 0.80 0.65 0.55
28 β 17° 22´ 13°8´ 8°43´ 7°40´ 5°23´ 4°2´ 3° 39´ 2°53´ 2°12´ 2°38´
z1 4 3 2 2 1 1 1 1 1 1
Tab. 19.3 Dimensions and Combinations of Gear Units Input Flanges with IEC Electric Motors
P
M
N
For motor size IEC Shaft dia M N H7 P S
56 B14A 9 65 50 80 5.5
63 B14A 11 75 60 90 5.5
∅S
59 prior to alterations