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Title: |
1922 Article-Pedrick Tool & Machine Co. , Pedrick Portable Taper Boring Bar |
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Source: |
Machinery, V28, #12 , Dec. 1921, pg. 332 |
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Insert Date: |
11/24/2024 7:32:02 PM |
PEDRICK PORTABLE TAPER BORING-BAR
A portable boring-bar designed primarily for taper-boring operations, but which may also be used for straight boring and facing, is a recent product of the Pedrick Tool & Machine Co., 3639 N. Lawrence St., Philadelphia, Pa. The special features of the bar are the possibility of taking it to the job and its adjustability to suit any degree of taper. The boring-bar is supported on the part being machined by means of cross-heads having four set-screws that enable the bar to be finally and accurately aligned after it has been roughly centered in the hole to be machined. A conical rotation of the bar is produced through a cross-slide and yoke to which the bar is attached. The degree of taper is controlled by the distance that the slide is moved from its central axis. The lower end of the bar, to which the feed-case is attached, describes an orbit and thus necessitates the provision of a spherical-shaped bearing in its cross-head. By preventing the handwheel of the feed-case from turning, the feed becomes constant and automatic. The gearing of this device may be driven by belt, electric motor, or air drill. When a facing arm is used with the boring-bar, the latter is held by spiders inserted in the bore of the work. |
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1922 Pedrick Tool & Machine Co. , Pedrick Portable Taper Boring Bar
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