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2. Lubricants
2.5.1 Solid lubricants
w
Sol
id lubricants may only be used
after prior consultation with SKF
Lubrications Systems.
Regarding the different solid lubricants in
chisel pastes, observe the following:
Graphite
Max. graphite content 8%
Max. grit size 25 µm
(preferably in lamellar form)
MoS
2
Max. MoS
2
content 5%
Max. grit size 15 µm
Copper
Chisel pastes containing copper are known
to lead to coatings forming on pistons, bore
holes, and mating surfaces. This can result
in blockages in the centralized lubrication
system.
Calcium carbonate
Chisel pastes containing calcium carbonate
are known to lead to very heavy wear on
pistons, bore holes, and mating surfaces.
Calcium hydroxide
Chisel pastes containing calcium hydroxide
are known to harden considerably over time,
which can lead to failure of the centralized
lubrication system.
PTFE, zinc, and aluminum
It is not yet possible to define any limit val-
ues for these solid lubricants on the basis of
existing knowledge and practical experience.
