Accession Number:

AD0275266

Title:

THE DEVELOPMENT OF LUBRICANTS FOR HIGH-SPEED ROLLING CONTACT BEARINGS OPERATING OVER THE RANGE OF ROOM TEMPERATURE TO 1200 DEGREES F.

Descriptive Note:

Progress rept. no. 4, 1 Jun-30 Sep 61.

Corporate Author:

FAIRCHILD HILLER CORP BAY SHORE NY STRATOS DIV

Personal Author(s):

• GRAY, S.

Report Date:

1961-09-30

Pagination or Media Count:

48.0

Abstract:

Angular contact-type ball bearings of 20 mm bore size were operated in endurance tests on powdered type lubri ants at 30,000 rpm and under 100 lb thrust loading and 10 lb radial loading. In one test, 26 hr of operation were achieved using a lubricant mixture of 70 MoS2 plus 30 PCH2 metal-free pthalocyanine entrained in a N gas carrier in 10 temperature cycles over the range from room temperature up to 1200 F. In another test, a 25-12 hr interval of operation with the same lubricant at 1200 F was demonstrated. There was no evidence of metal fatigue or excessive lubricant buildup in the bearings. Total radial play increased by 0.0036 in. and 0.0023 in. respectively. Investigations with a lubricant composed of graphite plus CdO in an air carrier in a series of bearing t sts at 30,000 rpm and 1200 F resulted in difficulties after 11-12 to 16-14 hr due to the progressive buildup of a hard lubri ant deposit on the bearing contact surfaces. Variations of the mixture ratio and flow rates did not have a significant influence on the amount f buildup. Bearing materials w re a cast Co-base alloy with wrought Ni-base alloy retainers. Author

Descriptors:

• *CADMIUM COMPOUNDS
• *GRAPHITE
• *LUBRICANTS
• *MOLYBDENUM COMPOUNDS
• AIR
• BEARINGS
• COBALT ALLOYS
• DEPOSITS
• FRICTION
• HIGH TEMPERATURE
• LUBRICATION
• MIXTURES
• NITROGEN
• OXIDES
• CYANATES
• SULFIDES

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE