Siemens SIMOTICS 1PQ8 Operating Instructions Manual page 28

Description
Version
Vertical type of construc‐
tion, shaft height 315
Vertical type of construc‐
tion, shaft height 355 ... 450
Roller bearings for high-speed version
For high-speed versions, the roller bearing is designed as follows:
Table 3-5
Version
Horizontal type, elastic power out‐
put via coupling
Rolling-contact bearing design for "Increased degree of protection" (option)
Improved sealing of the bearing units to prevent dust and water from getting in can be achieved
by positioning a grease chamber ahead of the actual bearing unit. Although the same grease
is used in both cases for reasons of convenience, a distinction is made here between
"lubricating grease" and "sealing grease" because of their different functions.
Layout
The spent lubricating grease collects in the space between the bearing housing and the outer
bearing cap. The latter also forms the sealing grease chamber with the labyrinth sealing ring
(optional). The second lubricating nipple containing the grease duct for pressing in the sealing
grease is also located in the outer bearing cap. The chamber is sealed off from the space
where the lubricating grease collects by a V-ring or a V-ring and felt ring combination which
prevents the sealing grease in the chamber from penetrating into the lubricating grease
collecting space. During operation, the sealing grease in the chamber slowly runs out via the
labyrinth and seals it, additionally removing dust from inside and around the outside of the
labyrinth ring.
Terminal box
The terminal box can be arranged either on the left or right of the machine. It is not possible
to change the position to the other side of the machine at a later date.
If you wish to upgrade to the next largest terminal box at a later date, please contact the
manufacturer.
28
Roller-contact bearings
● Drive end: Deep-groove ball bearing as a fixed bearing
● Non-drive end: Deep-groove ball bearing as a floating bearing with
axial compression springs
● Drive end: Pairing of angular-contact ball bearing / deep-groove ball
bearing as a fixed bearing
● Non-drive end: Deep-groove ball bearing as a floating bearing with
axial compression springs
Roller bearings designs for high-speed version
Roller bearings
● Drive end: Deep-groove ball bearing as a fixed bearing
● Non-drive end: Deep-groove ball bearing as a floating bearing
with axial compression springs
SIMOTICS TN Series N-compact 1PQ8
Operating Instructions 11/2018