ThyssenKrupp Rothe Erde Manual Del Usuario página 8

8
Installation · Lubrication · Maintenance (ILM)
®
Does not apply to bearings with specific ILM instructions – for replacement
deliveries it is essential to get into contact with the machine manufacturer
regarding installation, lubrication and maintenance.
Fastening bolts
Normal fastening bolts, nuts and washers (without surface
treatment) in strength class 10.9 acc. to DIN ISO 267.
It is essential to comply with the specified number and
diameter. The bolts must be carefully preloaded cross-
wise to the specified values (table 2 on page 7 gives
several recommended values). The surface pressure
underneath the bolt head or nut must not exceed the
permitted limit values (see the "Fastening bolts" chapter
in the catalog Rothe Erde
www.thyssenkrupp-rotheerde. com, also with regard
to the minimum grip of the bolt). If the limiting surface
pressure is exceeded, washers of the appropriate size
and strength must be pro vided. The minimum length of
engagement must be guaranteed in the case of blind
hole threads. If a hydraulic tensioning device is used, it
is essential to adhere to the required projections for the
screw threads or stud bolt threads and to use the appro-
priate washers (see the "Bolts" chapter in the catalog
®
Rothe Erde Slewing Bearings or www.thyssenkrupp-
rotheerde.com).
The determination of the tightening torque depends not
only on the strength class of the bolt and the tightening
process but also on the friction in the thread and the
contact surface of the bolt head and nut. The tightening
torques given in table 2 on page 7 are recommended
values based on lightly oiled threads and contact surfaces.
Dry threads will require higher torques whilst heavily
oiled threads will require lower tightening torques. The
values may, therefore, vary considerably. This applies in
particular to threads larger than M 30 or 1b". For bolts
of this size the use of bolt tensioning is recommended.
If the frictional bond is not adequate, it is advisable to
use a suitable compound to increase the frictional bond,
or else make a form-locking connection. Welding of
slewing bearings is not permitted.
®
Slewing Bearings or
Lubrication and Maintenance
All the grease nipples must be easily accessible, lubrica-
tion lines must be provided if necessary. ThyssenKrupp
Rothe Erde recommends the installation of an automatic
central lubricating system. The bearing system and the
gearing must be greased immediately after installation.
The lubricants specified in table 3 on page 9 are to be
used for this and each subsequent lubrication. The only
lubrication to be used on the raceway is KP 2 K grease,
i.e. lithium saponified mineral oils of NLGI Grade 2 with
EP additives. The raceway lubricants listed in table 3 on
page 9 can be mixed together. The lubricants are listed
in alphabetical order. The grease fill prevents friction,
provides protection against corrosion and is a component
of the seal.
Therefore the bearing must always be greased liberally
so that a collar of fresh grease forms around the whole
circumference of the bearing gap and lip seals. The
bearing should be rotated during relubrication.
Lubricants
Risk of skin irritation caused by
lubricants
• Safety gloves must be worn when
handling lubricants
• Pay attention to the producer's data
Queries about lubricants should be directed to the
respective manufacturer.
The greases listed in table 3 on page 9 are approved for
our slewing bearings and tested for compatibility with
the materials which we use for our spacers and seals.
The list of greases is not exhaustive.
CAUTION