A Laboratory Manual of Machine Shop Practice |
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Page 1
... light center punch mark . 3. Scribe circle 3 " in diameter about this center , and with dividers divide circumference into seven equal parts . Mark the seven points of division with light center punch marks . 4. Scribe " circles about ...
... light center punch mark . 3. Scribe circle 3 " in diameter about this center , and with dividers divide circumference into seven equal parts . Mark the seven points of division with light center punch marks . 4. Scribe " circles about ...
Page 2
... is screwed snugly into place . In Part 3 , to divide the circle into seven equal parts , first make a light center punch mark anywhere on the cir- cumference . Then set the dividers to what you estimate 2 MACHINE SHOP PRACTICE.
... is screwed snugly into place . In Part 3 , to divide the circle into seven equal parts , first make a light center punch mark anywhere on the cir- cumference . Then set the dividers to what you estimate 2 MACHINE SHOP PRACTICE.
Page 3
... light blow with the hammer . Be careful to hold the punch vertical . If this first light mark is accurately placed , you are not likely to have any trouble deepening the mark as much as necessary without shifting it . The main ...
... light blow with the hammer . Be careful to hold the punch vertical . If this first light mark is accurately placed , you are not likely to have any trouble deepening the mark as much as necessary without shifting it . The main ...
Page 6
... light center punch mark , using the 6 " thin steel square , which you may obtain from the instructor . Scribe two diameters at right angles to each other . Scribe the four sides of the square through the four points thus located on the ...
... light center punch mark , using the 6 " thin steel square , which you may obtain from the instructor . Scribe two diameters at right angles to each other . Scribe the four sides of the square through the four points thus located on the ...
Page 8
... light center punch marks . Scribe the sides of the hex . to join the points of division . If the student succeeds in turning out Jobs 2 and 3 according to the layout and to a neat fit , he will have reason to be proud of his ...
... light center punch marks . Scribe the sides of the hex . to join the points of division . If the student succeeds in turning out Jobs 2 and 3 according to the layout and to a neat fit , he will have reason to be proud of his ...
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Common terms and phrases
26 teeth according to drawing Ask instructor babbitt metal Bar Iron BEARING STANDARD bed plate belt BEVEL bottom Cast Iron center punch mark chuck on lathe clamping cold chisel cold rolled steel COUNTERSHAFT countersink crank shaft cutter cylindrical depth diameter dimensions on drawing drill and ream Drill and tap drill holes DRILL PLATE drill press emery FEED ARM flat GEAR CUTTING grinding hardening hermaphrodite caliper IDLER PULLEY independent chuck index head keyway lacing lathe dog lathe tool light center punch Machinery's Handbook method micrometer micrometer caliper milling machine Morse taper Mount NOTES AND CONCLUSIONS Obtain oil cup piece planer polishing race and cone reamer Req'd round cold rolled screw thread scribe set screw shaper shown on drawing slot steady rest student swing on centers tailstock center Tap drill taper attachment template thread cutting threading tool tool post tool steel turn and face V-THREAD vise
Popular passages
Page 16 - To read the micrometer, therefore, multiply the number of vertical divisions visible on the sleeve by 25, and add the number of divisions on the bevel of the thimble, from 0 to the line which coincides with the horizontal line on the sleeve. For example, as the tool is represented in the engraving, there are ten divisions visible on the sleeve.
Page 16 - The pitch of the screw threads on the concealed part of the spindle is 40 to an inch. One complete revolution of the spindle therefore moves it longitudinally one fortieth (or twenty-five thousandths) of an inch. The sleeve D is marked with 40 lines to the inch, corresponding to the number of threads on the spindle.
Page 16 - The beveled edge of the thimble is marked in twenty-five divisions, and every fifth line is numbered from 0 to 25. Rotating the thimble from one of these marks to the next moves the spindle longitudinally %s of twentyfive thousandths or one-thousandth of an inch.
Page 12 - To construct a parabola: Divide line AB into a number of equal parts and divide BC into the same number of parts. From the division points on AB, draw horizontal lines. From the division points on BC, draw lines to point A. The points of intersection between lines drawn from points numbered alike are points on the parabola. To construct a hyperbola: From focus F, lay off a distance FD equal to the transverse axis, or the distance AB between the two branches of the curve. With F as a center and any...
Page 97 - Hand-saw blunt. — Used for filing the teeth of band-saws. Cant files. — For filing the inner angles of spanners or wrenches for hexagon bolt heads and nuts. Lightning files. — For tiling •'lightning saws" and the M shaped teeth of crosscut saws.
Page 12 - FD, 1| inches above and below A B. Let A be the vertex of the parabola. Divide AE into any number of equal parts and divide EC into the same number of equal parts. Through the points of division, R, S, T, U and V, draw horizontal lines and connect L, M, N, O and P, with A. The intersections of the horizontal lines with the oblique lines are points on the curve. For instance, the intersection of AL and the line V is one point and the intersection...
Page 16 - One complete revolution of the spindle, therefore, moves it lengthwise onefortieth (or twenty-five thousandths) of an inch. The sleeve D is marked with forty lines to the inch, corresponding to the number of threads on the spindle.
Page 97 - Used by mechanics generally for a great variety of purposes — one of most common files in use.
Page 97 - For the rougher work in finishing or enlarging mortises and keyways, when of considerable length.