Product including filmed screw
View Patent ↗A first component defines a threaded bore. A second component is kept in contact with the first component. A clamping screw penetrates through the second component and is screwed in the threaded bore. A lubricating agent film is interposed between the threaded bore and the clamping screw. The lubricating agent film is made of a macromolecular compound having a polar end group. The lubricating agent film serves to reduce the friction between the threaded bore and the clamping screw. Generation of dust is prevented when the clamping screw is being screwed into the threaded bore. In addition, the clamping screw exhibits a larger axial force at a certain amount of a fastening torque as compared with a conventional clamping screw. A larger axial force can thus be applied to hold the second component onto the first component.
1. A storage medium drive comprising:
an enclosure;
a first component enclosed in the enclosure, said first component defining a threaded bore;
a second component enclosed in the enclosure, said second component kept in contact with the first component;
a clamping screw screwed in the threaded bore of the first component for fixation of the second component onto the first component; and
a lubricating agent film located at least in a space between the threaded bore and the clamping screw, said lubricating agent film made of a macromolecular compound having a polar end group.
2. The storage medium drive according to claim 1 , wherein said macromolecular compound is perfluoropolyether.
3. The storage medium drive according to claim 2 , wherein the lubricating agent film is located in a space between the clamping screw and the second component.
4. The storage medium drive according to claim 3 , wherein the lubricating agent film has a thickness in a range from 0.5 nm to 10.0 nm.
5. The storage medium drive according to claim 4 , wherein the lubricating agent film is formed on a surface of the clamping screw.
6. A storage medium drive comprising:
an enclosure;
a rotating body enclosed in the enclosure, said rotating body supported on the enclosure for relative rotation;
a storage medium enclosed in the enclosure, said storage medium mounted on the rotating body;
a clamp fixed to a tip end of the rotating body, said clamp designed to urge the storage medium against a flange of the rotating body;
a clamping screw screwed in the rotating body to urge the clamp toward the flange; and
a lubricating agent film located in a space between the clamping screw and the clamp, said lubricating agent film made of a macromolecular compound having a polar end group.
7. The storage medium drive according to claim 6 , wherein said macromolecular compound is perfluoropolyether.
8. The storage medium drive according to claim 6 , wherein the lubricating agent film has a thickness in a range from 0.5 nm to 10.0 nm.
9. The storage medium drive according to claim 6 , the lubricating agent film is formed on a surface of the clamping screw.
10. A method of aligning a center of gravity of a storage medium, comprising:
screwing a clamping screw in a threaded bore defined in a rotor of a spindle motor in a storage medium drive, said clamping screw penetrating through a clamp, said clamp serving to urge a storage medium against a flange of the rotor;
driving the spindle motor for rotation of the storage medium so as to detect a rotational instability of the storage medium; and
applying an impact to the storage medium drive in a direction perpendicular to a rotation axis of the rotor depending on the rotational instability, wherein
a lubricating agent film is located in a space between the clamping screw and the clamp, said lubricating agent film made of a macromolecular compound having a polar end group.