Greases and Preservatives

The selection of the correct lubricant is crucial for the reliable functioning of the bearing. The lubricant should be selected according to the operating conditions of the bearing: temperature, compressive load, and speed.

Standard Grease

As the standard grease for our preloaded AX series, we use a special grease from Kluber, which is available directly from the manufacturer. It has good pressure and wear stability and contains no inorganic solid lubricants (such as MoS₂ or graphite).

Property	Value / Description
Temperature range	-40°C to +150°C
Base oil viscosity @ 40°C	~130 mm²/s (DIN 51562)
Base oil viscosity @ 100°C	~14 mm²/s (DIN 51562)
Color	Yellow
Consistency enhancer	Li-special soap
Oil type	Mixed synthetic hydrocarbon
NLGI class (DIN 51818)	1
Density	~0.88 g/cm³
Flow pressure (DIN 51805)	< 1400 mbar
Maximum storage duration	36 months

High elastomer compatibility allows the use of conventional sealants. If there are doubts about compatibility, the sealant material can be tested. For relubrication, we recommend using metering systems or central lubrication systems to avoid over-lubricating the bearing. The grease is always easily conveyed.

Do not remove pre-greased bearings from the protective packaging until just before assembly. To avoid grease aging, we recommend installing bearings within one year of delivery. Maximum storage duration from delivery should not exceed 3 years.

Grease Mixing Requirements

If other greases are to be used for relubrication, miscibility must be checked. Greases can be mixed under the following conditions:

Identical base oil basis
Consistent thickener type
Similar base oil viscosities (within one ISO-VG class)
Matching NLGI class

Using incompatible base oils or soap bases will lead to premature bearing failure.

Special Lubricant

For high-speed applications, we can provide you with suitable lubricants upon request. Please contact myonic application engineering for this purpose.

Preservatives

The corrosion protection oil used is compatible and miscible with most mineral oil-based greases and oils. When using synthetic lubricants and consistency enhancers other than lithium (complex) soap, check compatibility. If incompatible, consult myonic for further procedures.

Miscibility of Base Oils
	Mineral oil	Synth. hydrocarbon	Ester oil	Polyglycol	Silicon oil (Methyl)	Perfluoralkyl ether	Silicon oil (Phenyl)	Polyphenyl ether oil
Mineral oil	+	+	+	-	-	-	+/-	+
Synth. hydrocarbon	+	+	+	-	-	-	-	+
Ester oil	+	+	+	+	-	-	+	+
Polyglycol	-	-	+	+	-	-	-	-
Silicon oil (Methyl)	-	-	-	-	+	-	+/-	-
Perfluoralkyl ether	-	-	-	-	-	+	-	-
Silicon oil (Phenyl)	+/-	-	+	-	+/-	-	+	+
Polyphenylether oil	+	+	+	-	-	-	+	+

+ miscible +/- miscible to a certain extent - non-miscible

Miscibility of Thickener Systems*
		Metal-soap-greases				Complex-soap-greases					Greases
		Al	Ca	Li	Na	Al	Ba	Ca	Li	Na	Bentonite	Polyurea	PTFE
Metal-soap- greases	Al	+	+/-	+	+/-	+	+/-	+	+	+/-	+	+	+
	Ca	+/-	+	+	+	+	+	+	+/-	+	+	+	+
	Li	+	+	+	-	+	+	+	+	-	+/-	+/-	+
	Na	+/-	+	-	+	+	+	+/-	+/-	+	-	+	+
Complex-soap- greases	Al	+	+	+	+	+	+	+/-	+	+/-	+/-	+/-	+
	Ba	+/-	+	+	+	+	+	+/-	+/-	+	+	+/-	+
	Ca	+	+	+	+/-	+/-	+/-	+	+	+	+/-	+	+
	Li	+	+/-	+	+/-	+	+/-	+	+	+/-	+	+/-	+
	Na	+/-	+	-	+	+/-	+	+	+/-	+	-	+	+
Greases	Bentonite	+	+	+/-	-	+/-	+	+/-	+	-	+	+	+
	Polyurea	+	+	+/-	+	+/-	+/-	+	+/-	+	+	+	+
	PTFE	++	+	+	+	+	+	+	+	+	+	+	+

+ miscible +/- miscible to a certain extent - non-miscible
*) The miscibility of the base oils must be guaranteed.

Grease Operating Period

The grease operating period indicates how long the grease is able to sufficiently lubricate the bearing without relubrication. After the grease operating period is reached, the bearing can only function to a limited extent. The bearing may fail relatively quickly due to lubricant failure. If the grease operating period is shorter than the calculated bearing life, it becomes the determining variable. This applies when the rolling bearing cannot be relubricated. The calculation of the grease operating period is based on statistical principles, assuming constant operating conditions and suitable and sufficient lubricant.

The following operating parameters are required for approximate calculation of the grease operating period:

Load cycle in series operation (speed, duty cycle, standstill time, ...)
Bearing temperature (if available)
Bearing cooling (if available)

Please contact myonic application engineering for grease operating period calculations.

Relubrication Intervals

The relubrication procedure should be performed while the bearing is at operating temperature and rotating slowly. This ensures even distribution of grease in the bearing. With a calculated relubrication interval of more than 1 year, we recommend relubricating the bearing after 1 year with the defined grease quantity.

Please contact myonic application engineering for relubrication interval calculations.