. Sheet metal workers' manual; a complete, practical instruction book on the sheet metal industry, machinery and tools, and related subjects, including the oxy-acetylen welding and cutting process . close thelock down with a mallet. The practice of edging sheetslonger than the machine, however, is adopted only inemergency cases, or where only a little of that work is tobe done. The capacity of the machine is No. 22 gauge iron andlighter (U. S. Standard). Operation.—In using the pipe folder just describedspecial judgment should be exercised in changing thegauge to secure % and % inch lock. Care
. Sheet metal workers' manual; a complete, practical instruction book on the sheet metal industry, machinery and tools, and related subjects, including the oxy-acetylen welding and cutting process . close thelock down with a mallet. The practice of edging sheetslonger than the machine, however, is adopted only inemergency cases, or where only a little of that work is tobe done. The capacity of the machine is No. 22 gauge iron andlighter (U. S. Standard). Operation.—In using the pipe folder just describedspecial judgment should be exercised in changing thegauge to secure % and % inch lock. Care should betaken not to turn in the gauge screw on the lever end so 52 SHEET METAL WORKERS MANUAL far that it strikes against the folding bar, thus drawingthe folding blade out of line; and the gauge screw onthe opposite end should not be turned in so far that itpushes the gauge and folding blade out of line. Thegauge screws described hold or release a hidden gaugeunder the folding blade, and have an important part inadjusting the machine for forming the two sizes of locksreferred to. When the gauge screw next to the hand lever is screwedin and the gauge screw on the other end is unscrewed,. Figure 19.—Can Top Folder. the gauge is held up next to the folding blade and turns a^4 inch lock. When the gauge screw next to the handlever is unscrewed and the gauge screw on the other endof the machine is screwed in, the gauge is held down so asto turn a % inch lock. Before changing the gauge thehand lever should be pushed toward the left as far as itwill go, in order to bring the screw holes to their properplaces. As the screws that hold on the cap, folding blade,and gauge sometimes become loosened, see that thesescrews are tightened enough to hold the folding bladefrom springing, but not so tight that the folding bladeslides hard. Can Top Folder.—Tapered sheet metal patterns for oil-can breasts, funnel bodies, etc., are usually cut from pat- SHEET METAL WORKING MACHINERY 53 tern,
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Keywords: ., bookcentury1900, bookdecade1910, bookidsheetmetalwo, bookyear1918
