Depending on the gearbox type, housings of frame sizes 39 and 49 are made of die-cast
aluminum or cast iron.
Table 12-28 Housing material
Gearbox type Frame size
39 39A 49
Helical gearboxE Cast iron Cast iron
Helical gearboxD/Z Aluminum Cast iron
Parallel shaft gearboxF Cast iron Cast iron
Bevel gearboxB Aluminum Aluminum
Bevel gearboxK Cast iron Cast iron
Helical worm gearboxC Aluminum Cast iron
From frame size59, the gearbox housings are made of cast iron.
Geared components
The geared components are hardened and ground.
For the helical worm gearbox, the worm is hardened and ground. The gear is manufactured
from high-quality bronze.
The bevel gear stage of the bevel gearbox is lapped in pairs.
Lubrication
The geared components are supplied with adequate lubricant by means of splash lubrication.
Shaft bearings
All shafts are mounted in rolling bearings. The rolling bearings are lubricated using splash
lubrication or oil-spray lubrication. Bearings that are not supplied with lubricant are closed
and grease-lubricated.
12.3.4 Shaft seals
The shaft sealing rings on the output side prevent lubricant from escaping from the housing at
the shaft outlet and prevent pollution from entering the housing.
The optimum use of the seals depends on the ambient conditions and the lubricant being
used.
Radial shaft sealing ring
A high-quality radial shaft sealing ring is used as standard seal. The ring is provided with an
additional dust lip to protect against contaminants from outside.
Permitted oil sump temperatures -40° C to +80° C.
Seal for a longer service life (optional)
The radial shaft sealing ring with dust lip has an additional buer axial seal towards the
inside of the gearbox. The sealing system has a high degree of reliability as a result of the
insensitivity with respect to contaminations in the oil.
Additional information on the SIMOGEAR geared motor
12.3Specic data gearbox
SINAMICS G115D Wall Mounted distributed drive
Operating Instructions, 07/2023, FW V4.7 SP14, A5E52808211A AA 481
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