Lubrication of Balance and Sting Components, P.W. Laut, 1976

NASA-AMES FAO:227-8
Moffett Field, California
April 23, 1976

MEMORANDUM for Mechanical Operations Branch Personnel
FROM: Chief, Mechanical Operations Branch
SUBJECT: Lubrication of Balance and Sting Components

In order to be consistent in assembly techniques of sting and balance components in all Aeronautics Division wind tunnel test sections, the following lubricants and procedures are recommended prior to final assembly.

I. Tapered Mating Surfaces

Component combinations such as: (1) balance to sting; (2) sting to sting; (3) sting to secondary adapter; (4) secondary adapter to primary adapter, primary adapter to model support, require a very light application of oil only. Lubricating oil, steam turbine, corrosive resistant, DTE #26 only, (currently available in stock), shall be used for this purpose. Apply thoroughly to both male and female surfaces of the tapered components. Then with a clean lint-free paper towel such as Kimwipes, Kaydry, Maslin, wipe and remove as much oil as possible from the taper, leaving a very thin film which serves as a parting agent.

II. Parallel Bearing Surfaces

Component combinations such as: (1) balance to model; (2) sleeve to balance; (3) sleeve to model; (4) or any other sliding surface bearing fit where an extreme pressure lubricant is required, center point grease shall be used. Apply a very thin coat to all surfaces of contact prior to assembly.

P.W. Laut