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Title: |
1915 Article-Rigid Tool Holder Co., Boring Tool Holders |
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Source: |
The Metal Industry, V13, Sept., 1915, pg. 385 |
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Insert Date: |
3/4/2023 8:12:15 PM |
The boring tools illustrated here, and other small tools, recently placed on the market by The Rigid Tool Holder Company, The boring tools illustrated here, and other small tools, recently placed on the market by The Rigid Tool Holder Company, of Baltimore, Md., were designed and originally made by a mechanic in the V. S. Bureau of Engraving and Printing, in Washington. D. C., for his own use. They proved good and the shops of all the government departments of Washington, so it is claimed, have either given or promised an order for one or more of them. The tools consist mainly of a special lathe boring bar, in ten sizes; four types of holders therefor, to meet various conditions; a special cutting off tool; and internal and external thread tools.
The boring bar’s cutter clamp’s power is multiplied five and a half times by the action of the push screw. Yet the normal exterior of the bar is not materially altered by the clamping mechanism; it requires no special wrench; cutter cannot screw up and dig in, in boring or unscrew and loosen in turning and there are no detached parts to get lost.
The adjustable boring tool fits most any lathe from 12-inches up. It has a broad square base; generous heft and marked rigidity. Its hinged elevating yoke, which carries the bar., is locked by the clamp nut, at any exact elevation. All the barports are elongated horizontally.
The double reversible boring tool has a one-piece steel holder and is as rigid as an anvil. It reverses both end for end and upside down, giving four bar elevations from 1 3/8-inch to 1 3/4 -inch, progressing by eighths. A ½-inch liner, furnished, makes it practically universal. The single reversible boring tool has another one-piece holder as rigid as possible and intended for two specified lathes only to which it is fitted. It reverses vertically only. The tool post boring tool has still another one-piece holder and is as rigid as a tool past tool can lie The angular opening between the shank and barrel brings the strain receiving cutter point “nearest possible” to the supporting tool post wedge. The bar has a solid bearing at each end of the long barrel and it takes bars of all sites up to its limit.
The cutting-off tool is obviously very rigid. It is either right or left handed. It always sits level; holds its blade up straight; has a long offset reach, and it is an ideal heavy duty tool Its ability to cut off tool steel under automatic cross feed is claimed.
U-shaped liners are used for elevating. |
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1915 Rigid Tool Holder Co., Boring Tool Holders
1915 Rigid Tool Holder Co., Boring Tool Holders
1915 Rigid Tool Holder Co.,Cutting-Off Tool Holders
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