Pulley and ball bearing for pulleys

Details Pulley and ball bearing for pulleys Pulley and ball bearing for pulleys

1996-09-04

1998-03-17

Hannon, Thomas R.

Endless belt power transmission systems or components

Friction drive pulley or guide roll

With stationary support for pulley or guide roll

384462, F16H 5704, F10C 3366

Patent

active

057280207

ABSTRACT:
A pulley which is brought into contact with a timing belt of an engine of automobile and a belt for driving auxiliary machinery, and a ball-bearing used for the same, wherein the radial internal clearance in the running state of a ball bearing is set to substantially 5 to 30 .mu.m, and grease to be sealed in said ball bearing is such that the base oil thereof is made a mixture of .alpha.-olefin oligomer and ester, the thickening agent thereof is made a mixture of an alicyclic urea compound and an aliphatic urea compound, the worked penetration thereof is roughly 240, and the base oil viscosity thereof is made 40 to 43 cSt at a temperature of 40.degree. C., whereby it is possible to suppress self-excited vibrations of a rolling element and to securely prevent the hoot sound from occurring. Furthermore, since grease used herein has superior characteristics in the high temperature durability, there is no worry about a lowering of the high temperature durability as in conventional pulleys in which low temperature grease of good low temperature characteristics is employed.

REFERENCES:
patent: 4402678 (1983-09-01), St. John
patent: 4509869 (1985-04-01), Johnston
patent: 4568316 (1986-02-01), Veikley et al.
patent: 4602875 (1986-07-01), Doerr et al.
patent: 5421788 (1995-06-01), Toth

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