Buy AeroShell Grease 33
The Microgel thickener used in AeroShell Grease 5 and AeroShell Grease 6 gives excellent working stability; the unworked/worked penetration figures for these two greases are 281/284 and 287/300 respectively. A further advantage of the use of non soap type thickeners can also be seen with greases such as AeroShell Grease 16 which is used in high speed / high temperature applications and has a temperature range of -54/+204 Deg C, an upper temperature limit not achievable with soap type thickeners.
The additives used in greases are similar to those used in oils, such as anti oxidants, corrosion inhibitors, load carrying additives etc. However, some greases are fortified with solid film lubricants such as Graphite or Molybdenum Disulphide (sometimes referred to as Moly) . These solid film lubricants give no real benefit in rolling element bearings but are particularly suited to heavily loaded, sliding applications such as splines, landing gear bogie pivot pins and the like. AeroShell Grease 17 is one such grease using this type of additive.
Mixing of Greases
Greases which have either different base oils or different thickeners should not be mixed. With the mixing of base oil types, there can be a problem of seal compatibility if a system designed for use with mineral oil based greases is exposed to a synthetic based grease. If different thickener types are mixed, it is often the case that the working stability of a the resultant mix is poorer than that of either of the two greases used. Because of this, the performance is compromised by the grease softening excessively in use even though it would appear to be a similar consistency in the tin. If in doubt, seek advice from your grease supplier.
Oil separation to a greater or lesser extent occurs with all greases. Unless the separation is excessive, the grease can be used provided it is stirred well before use.
When re-greasing a bearing with a grease gun, always apply enough grease for fresh, clean grease to be seen coming out of the bearing. This ensures that the bearing purged of the old, degraded grease which can then be wiped off and discarded.
The inspection or assembly of new bearings should be as follows:
Wear protective gloves - not just for your own safety but also to prevent oil from your fingers from effecting the lubrication of the raceway.
Remove the old bearing, clean off the old grease and rinse in a degreasing bath. Remove traces of old grease from the bearing housing and grease channels. If old grease cannot be removed from nipples, drillings and cut outs by cleaning alone, then apply fresh grease to the grease nipple and purge the channels whilst the bearing is removed.
Inspect the old bearing and replace if outside limits.
Having inspected the new or serviceable bearing, rinse the bearing through with Iso Propyl Alcohol (IPA) or a similar solvent to remove any traces of finger marks. The grease from your fingers can prevent some of the grease additives from bonding effectively with the bearing surfaces and so should be removed.
Pack the bearing with fresh grease prior to assembly. Ensure that the race is full and wipe off any excess.
Assemble the bearing to the manufacturer's instructions and using the correct tooling. Remember more bearings fail through improper assembly or misalignment than for any other reason.
One of the projects Shell has been working on is to develop a new genuine multi-purpose, corrosion inhibiting grease in conjunction with Beoing. Boeing wanted to rationalise the multitude of greases used on their airline fleet and together with Shell drew up a very demanding set of criteria.
To meet this demand Shell has developed AeroShell Grease 33 which is now used on all new manufacture commercial Boeing aircraft and Shell is the only manufacturer to have a grade currently capable of meeting the specification. AeroShell Grease 33 can do the job previously covered by 4 different greases and of over 359 grease application points on a Boeing 737, all but 9 are now lubricated by AeroShell Grease 33.
Download MSDS AeroShell Grease 33
HIGH PERFORMANCE GREASES AND HYDRAULIC FLUIDS
BMS 3-33 Approved
Left Flap Work and Aileron Installation
AeroShell Products Packaging
Withdrawal of AeroShell Grease 16
What Are They And How Do They Differ?
Boeing 737 - AeroShell Grease 33
Aerosol Grease D-5933NS
AEROSHELL Grease 33 is our newest generation multi-purpose synthetic grease. It is specifically designed to lubricate a wide range of applications and operating conditions on commercial aircraft. It is approved for Boeing’s BMS 3-33 specification and it covers the operating temperature range between –73 °C and +121 °C.
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