Main shaft device and machine tool with the same

Details Main shaft device and machine tool with the same Main shaft device and machine tool with the same

2007-12-25

2007-12-25

Cadugan, Erica (Department: 3722)

Gear cutting, milling, or planing

Milling

Cutter spindle or spindle support

C408S23900A, C409S233000

Reexamination Certificate

active

10534354

ABSTRACT:
An object of the invention is to provide a spindle apparatus which facilitates assembling and removing operations at the time of maintenance and which is low cost. In the invention, the diameter becomes smaller in the order of an inner peripheral diameter of an outer cylinder (3), an inside diameter of a stator (4), and an outside diameter of a bearing sleeve (11); a sub-assembly (2) made up of a front housing (8), a rotating shaft (6), and the bearing sleeve (11) is withdrawable from the outer cylinder (3); and the diameter of a rotating part in an arbitrary section located rearwardly of the bearing sleeve (11) is made smaller than a minimum diameter of a non-rotating part between a rear end of the bearing sleeve (11) and the section.

REFERENCES:
patent: 4944638 (1990-07-01), Brohammer
patent: 5307901 (1994-05-01), Stromberg
patent: 2004/0074074 (2004-04-01), Kikkawa et al.
patent: 2007/0110533 (2007-05-01), Geissler et al.
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patent: 2000-52104 (2000-02-01), None
patent: 2003-159622 (2003-06-01), None
Machine Translation of DE 10027750, 4 pages.

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