DESIGN CRITERIA FOR ROLLING ELEMENT AIR FRAME BEARINGS FOR HIGH TEMPERATURE AND HIGH ALTITUDE USE
Abstract
Aircraft Control Bearings were experimentally studied to evaluate bearing design, materials, and lubricants for operation at 1200 F and 250,000 ft. altitude. Four roll design, twelve material combinations and five dry lubricants were investigated. The best design and two best material combinations (6B (Cobalt Alloy) vs 6B and CA-3 (Tungsten Carbide Cermet) vs 6B) were subjected to stresses up to 325,000 psi at the temperature and altitude. One in. diameter bore, self aligning, double row roller bearings fabricated from 6B vs 6B carried loads to 5000 lbs. for 40,000 cycles at 1200 F and 250, 000 ft. altitude when lubricated with DF-700 dry film. Friction coefficients with the lubricants ranged from .08 to .25. Successful bearing operation requires considerable deviation from design criteria for fluid lubricated bearings.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1963
- Accession Number
- AD0407445
Entities
People
- Harold E. Munson
- Jamshed B. Havewala
- John H. Johnson