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GRW High Precision Ball Bearings

High precision ball bearings in grades up to ABEC 9 with bores from 1 to 30mm and comparable inch dimensions

Bearing Selector

Inch/Metric Bearing
Tolerance:
Desired Bore
Desired Outer Diameter
Material
Type
Closure

lubricants

Selecting the right lubricant and lubricating method is just as decisive for the bearing function as selecting the bearing itself and designing the mating parts.

The decision on a specific lubricant is made according to the operating conditions and the torque demands.

Lubricating oils

Lubricating oil is mainly used where minimum torque is required. 
 
GRW ball bearings, either open or with one closure, are preserved with oil ex works if no special lubrication is specified.

Lubricating greases 
 
GRW ball bearings with closures on both sides and also our ball bearings with one closure together with a snap retainer are greased ex works if no special lubrication is specified.

Regarding this we would mention that lubricating greases with EP additives are not suitable for low-noise ball bearings.

The ball bearings can be lubricated with oils and greases other than those listed in the tables upon request and in quantities agreed upon. There are around 250 lubricants to choose from. Please contact us for specific details.

Special treatment

Special operating conditions go beyond the limits of application even for the special lubricants which are used. In such cases it is possible to specify suitable ball bearings by using different coatings. Galvanically applied precious metal layers, graphite, MoS2 etc. are used here. This treatment is used for ball bearings to work in vacuum systems up to ultra-high vacuums (UHV), in aviation and aerospace technology and at extreme temperatures.

Hard coatings, for example, TiC, TiN or highest grade chromium are also applied for special applications.

Please contact us for further information.

Table 3: Lubricating Oils

Code

Brand Name

Manu-facturer

Basic Oil

Operating Temperature Range

Viscosity at 40oC/100oC [mm2/s]

Specification

L001

Aero Shell Fluid 12

Shell

Ester

-40 to 100oC

15/3.7

MIL-L-6085 C

L010

Isoflex PDP 38

Klüber

Ester

-65 to 100oC

12/3.2

Following

MIL-L-6085

L014

Krytox 143 AC

Du Pont

PFPE

-34 to 288oC

200/30

-

L020

Shell Ensis L

Shell

Mineral

-10 to 100oC

32/5.5

-

L085

Nyosil M 25

Nye

Chlorphenyl-silikon

-70 to 200oC

56/20

-

L027

Synthetic Oil 200 A (Winsor Lube L 245 X)

Nye

Ester

-54 to 200oC

13/3.4

MIL-L-6085 C

L065

Gargoyle Arctic SHC 224

Mobil Oil

Polyalphao-lefin

-45 to 140oC

29/5.6

USDA-H1

Table 3: Lubricating Process

Code

Brand Name

Manu-facturer

Composition

Operating Temperature Range

Viscosity

at 40oC/

100oC [mm2/s]

Speed Factor

Specifi-cation

G305

ASG 7

Shell

Diester/

microgel

-73 to 149oC

15/3.1

Not known

MIL-G-23827 B

G310

Asonic GLY 32

Klüber

Ester + polyalpha-olefin/

lithium

-50 to 140oC

25/5

1.000.000

-

G315

Barrierta L 55/2

Klüber

PFPE/PTFE

-40 to 260oC

400/38

300.000

-

G316

Nye Instrument Grease 704 B

Nye

Diester/

lithium

-65 to 150oC

11.8/3.25

300.000

-

G331

Isoflex Super LDS 18

Klüber

Mineral oil + ester / lithium

-50 to 120oC

15/3.7

1.000.000

-

G332

Isoflex Topas NB 52

Klüber

Polyalphao-lefin/barium complex

-50 to 150oC

30/5.5

1.000.000

Following

MIL-G-81322

G338

Krytox 240 AC

Du Pont

PFPE/PTFE

-34 to 288oC

200/30

400.000

MIL-G-27617

Type III

MIL-G-27616

G340

Longtime PD2

Optimol

Mineral oil/lithium

-35 to 140oC

95/9.0

1.000.000

-

G366

Nyogel 781 D (versilube G300)

Nye

Ghlorophe-nylsilicon/

lithium

-70 to 200oC

53/18.9

200.000

-

G462

Unisilkon L50/2

Klüber

Silicon/PTPE

-50 to 200oC

112/27

200.000

-

G463

Mobilgrease FM 102

Mobil Oil

White oil/ aluminium complex

-20 to 120oC

108/10.5

400.000

FDA 178.3570 USDA-H1

 

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