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Machine Tools and Their Operation Volume 1

Machine Tools and Their Operation Volume 1


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About the Book

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1922 Excerpt: ... be taken up by adjusting nuts located at the rear box. The spindle is driven by friction clutch pulleys having hardened steel bushes and roller bearings operating on the hardened portion of the spindle. Lubricant for the pulleys is supplied from the oil chambers. The friction cones are engaged with the pulleys by sliding sleeve F' on levers G'. Adjustment for wear is secured by loosening clamp screw Hand turning nut /'. At J, J, Fig. 29, is shown a pair of screws by which the clutch sleeves are set central to give equal pressure on the two pulleys. THE SPINDLE REVERSE The reversal of the spindle is secured through the action of spring plunger K, Fig. 29, which, upon being released, throws the clutch into instant engagement with the pulley next the chuck. To run forward the clutch is engaged with the other pulley by cam L, which is operated by clutch M, drawn out at the completion of one revolution by lever N. As the spindle is reversed to run forward the plunger spring is compressed by the action of the cam, the plunger being held in place by a wide portion at the rear end of the lever 0. The carrier D shown below levers N and 0 in Figs. 26 and 28 is provided with dogs which may be adjusted to lift the levers at the proper time for reversing the spindle. Where work is to be threaded the positive clutch P serves to connect the carrier shaft with the front-or cut-off cam shaft Q. This clutch, as already stated, is disengaged when the cross-slide cams are to be changed and need not be connected for work which is not to be threaded. The carrier may be provided with two or more sets of dogs where it is necessary both to thread and tap the work or to cut two threads on it. OPERATION OF THE SPRING COLLET At R, Fig. 28, is shown an internally tapered sleeve which ...


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Product Details
  • ISBN-13: 9781158446872
  • Publisher: Rarebooksclub.com
  • Publisher Imprint: Rarebooksclub.com
  • Height: 246 mm
  • No of Pages: 68
  • Spine Width: 4 mm
  • Width: 189 mm
  • ISBN-10: 115844687X
  • Publisher Date: 01 May 2012
  • Binding: Paperback
  • Language: English
  • Returnable: N
  • Weight: 141 gr


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