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Title: |
1911 Article-John Lang & Sons, Stud & Bolt Screwing Machine |
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Source: |
Machine Tools Commonly Employed In Modern Engineering Workshop, V1, 1911, pg. 92 |
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Insert Date: |
5/1/2022 4:49:43 PM |
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A typical machine, manufactured by Messrs. John Lang & Sons, of Johnstone, is illustrated in fig. 123. The hollow spindle of the head is driven through strong reduction gear wheels from a four-step cone, as shown in the illustration, and on the nose of the spindle is mounted a special two-jaw chuck, each jaw being fitted with V grips, capable of being readily varied to suit the nature of the work. On the saddle, which is moved along the bed by a rack-and-pinion hand lever, is mounted the screwing die box. The dies used in this box are cut from specially formed steel bar, and fit directly into the three slides shown, the arrangement being such that the dies can cut a thread up to a shoulder or close to the chuck jaws. Both the length and the diameter of the work are controlled by simple adjustable stops, the stop for the length being visible in the illustration on the front of the machine below the head. Screws ranging from ½in. to 1½ in. can be cut on the machine, and the length of the bed from the face of the chuck is 22 in. |
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1911 John Lang & Sons, Stud & Bolt Screwing Machine
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