Best results are obtained in using BLUESIL GRS 33 if the following precautions are observed.
Generally, BLUESIL GRS 33 is not compatible with mineral greases; so, in case of use on bearings already working, it is advised to carefully remove old grease before packing with BLUESIL GRS 33.
BLUESIL GRS 33 can be applied by using any of the normal processes: brushes, pumps for greasing or automatic greasing devices.
For some applications, it is possible to incorporate BLUESIL FLD 510 to lower the viscosity of BLUESIL GRS 33. Care should be taken in mixing to ensure homogeneity (e.g. by using a mixer).
BLUESIL GRS 33 is soluble in aromatic and aliphatic hydrocarbons. This allows its application by spraying or by dipping.
c) Amounts of grease to be used
As for mineral greases, the optimum efficency of the grease is obtained with a predetermined level of filling. In practice it is found that bearing must be packed as follows taking into account their sizes :
- Size less than 75 mm: the bearing sould be packed with grease between one third and half the capacity.
- Size more than 75 mm: the bearing should be packed with grease between one half and three quarters of capacity.
d) Rotational speed
The performance of BLUESIL GRS 33 depends not only on the rotational speed but also on the size of the bearing. It is therefore useful to take into account the speed factor which is; bore size in mm x r.p.m.
BLUESIL GRS 33 is especially designed for lubrication of bearings running at a speed with the following maximum speed factors:
- 200 000 for small diameters
- 150 000 for large diameters.
Good results have been obtained for small bearings running at 70 000 r.p.m. thus showing its good resistance to centrifugal force.
BLUESIL GRS 33 does not give good results under high loads. A bearing lubricated with BLUESIL GRS 33 must not be used under a load higher than one third of its normal loading so as to assure a long service life.
f) Expansion effect
It is found that the service life of BLUESIL GRS 33 is by an increase in the load caused by difference in the expansion of the inner cage compared with the outer especially when the bearing works at high temperature. It is therefore necessary to make allowance for the difference in expansion. It is obviously not the case for bearings manufactured from special steels.
g) Behaviour at low temperatures
BLUESIL GRS 33 is highly recommended for use at low temperature. It does not stiffen and therefore the bearing will have low torque. The table below gives some typical low temperature torque. The table below gives some typical low temperature torque properties measured as described in specification ASTM-Method D 1476 when using BLUESIL GRS 33 having an average consistency.
starting torque (gm .cm)
Running torque (gm. cm)
- 55° C
- 70° C
1- BLUESIL GRS 33 should not be applied to surfaces which are to be painted.
2- BLUESIL GRS 33 is not recommended for the lubrication of taps and valves for oxygen systems. This is because silicones in contact with oxygen under pressure may cause explosions.
|BLUESIL GRS 33 may be stored at a temperature below 40 °C/ 104 °F for up to 18 months from its date of manufacturing.||Please consult the Safety Data Sheet of this product.||ELV;RoHS|
BLUESIL GRS 33
BLUESIL GRS 33 consists of a silicone fluid thickened with a lithium soap. It is especially designed for use in lubrication of ball-bearings and bearings operating at high or low temperatures (from - 70°C up to + 180°C).
Paste ＆ Grease
- Resistance to heat: slight lowering of viscosity with increasing temperature but does not decompose and gives a long service life.
- Very little change in consistency with temperature: does not stiffen when cold, does not thin out at high temperatures.
- Very good stability: especially in contact with water and most corrosive media.
- Negligible effect under vacuum: no change in consistency.
- Greasing of ball bearings or moving parts operating under severe weather conditions or working at extreme high or low temperatures: ski lift-carrier shafts, freezing equipment, electric motors, windscreen wipers, motor gears, rotating beacons for airport run ways, valves in the petroleum industry.
- Greasing of precision equipment in which the grease consistency must be nearly constant: aircraft switches, geo physical instruments, cameras, photographic equipment.
- Lubrication of ball-bearings which must operate at the same speed under very low to very high temperatures: clockwork mechanisms, x-ray equipment, synchronized motors.
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