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User Guide
EM-PMI375
Maintenance
©
Danfoss | November 2021
Grease can cause skin irritation and eye inflammation. Follow all safety precautions specified
by the manufacturer of the grease.
Make sure that the automatic greasing and the oil lubrication function correctly after you
start the electric machine.
The bearing type of the electric machine can be found on the rating plate of the electric
machine.
It is recommended to have a piping for the grease exiting the electric machine. The grease
exit hole is often in an inconvenient location when the electric machine is installed.
The mechanical bearing lifetime (grease relubricable bearings) of the electric machine is shown below. It
depends on the bearing operation temperature and rotation speed.
Electric machine with grease relubricable bearing option
The expression of L
in bearing lifetime information is a standard way of expressing the lifetime and
10
means the time period at the end of which 90% of the bearings are still reliably working. Grease
lubricated bearings (+BHS option) need regular greasing. This is due to the limited lubricant (grease)
lifetime in operation conditions, and is shorter time period than the actual bearing lifetime.
The standard bearing type for EM-PMI375-T1100 is 6214/C3 (non-insulated bearing, grease lubricated).
See the recommended lubricant in Chapter
Greased for life (BGL) bearing option
Greased for life bearings (BGL option) do not need relubrication during their lifetime.
The standard bearing type for EM-PMI375-T200, T500 and T800 is 6211-2RS1/C3WT (non-insulated
bearing, greased for life) or SKF 6211 2RS1/HC5C3WT (insulated bearing).
The lifetime of the bearing depends on the mounting position of the electric machine. The lifetime
depends also on the rotation speed of the electric machine and the temperature of the bearing. The
Recommended lubricants
on page 58.
BC265856307805en-000202 | 63
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