Lubricant and Additive Effects on Spur Gear Fatigue Life | Zendy

D. P. Townsend | Zendy; E. V. Zaretsky | Zendy; H. W. Scibbe | Zendy

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Lubricant and Additive Effects on Spur Gear Fatigue Life

Author(s) -

D. P. Townsend,

E. V. Zaretsky,

H. W. Scibbe

Publication year - 1986

Publication title -

journal of tribology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.498

H-Index - 84

eISSN - 1528-8897

pISSN - 0742-4787

DOI - 10.1115/1.3261243

Subject(s) - lubricant , metallurgy , materials science , base oil , viscosity index , viscosity , dry lubricant , sulfur , spur gear , spur , composite material , mechanical engineering , engineering , structural engineering , scanning electron microscope

Spur gear endurance tests were conducted with six lubricants using a single lot of consumable-electrode vacuum melted (CVM) AISI 9310 spur gears. The sixth lubricants was divided into four batches each of which had a different additive content. Lubricant tested with a phosphorus-type load carrying additive showed a statistically significant improvement in life over lubricants without this type of additive. The presence of sulfur type antiwear additives in the lubricant did not appear to affect the surface fatigue life of the gears. No statistical difference in life was produced with those lubricants of different base stocks but with similar viscosity, pressure-viscosity coefficients and antiwar additives. Gears tested with a 0.1 wt pct sulfur and 0.1 wt pct phosphorus EP additives in the lubricant had reactive films that were 200 to 400 (0.8 to 1.6 microns) thick.

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