Fundamentals of Machine Component Design, 4/E by Robert C. Juvinall and Kurt M. Marshek Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved.

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Presentation transcript:

Fundamentals of Machine Component Design, 4/E by Robert C. Juvinall and Kurt M. Marshek Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved. Figure 10.1 (p. 386) Helical threads of pitch p, lead L and lead angle.

Fundamentals of Machine Component Design, 4/E by Robert C. Juvinall and Kurt M. Marshek Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved. Figure 10.2 (p. 386) Unified and ISO thread geometry. The basic profile of the external thread is shown.

Fundamentals of Machine Component Design, 4/E by Robert C. Juvinall and Kurt M. Marshek Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved. Table 10.1a (p. 387) Basic Dimensions of Unified Screw Threads (Continued on next two slides.)

Fundamentals of Machine Component Design, 4/E by Robert C. Juvinall and Kurt M. Marshek Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved. Table 10.1b (cont.)

Fundamentals of Machine Component Design, 4/E by Robert C. Juvinall and Kurt M. Marshek Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved. Table 10.1c (cont.)

Fundamentals of Machine Component Design, 4/E by Robert C. Juvinall and Kurt M. Marshek Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved. Table 10.2 (p. 388) Basic Dimensions of ISO Metric Screw Threads

Fundamentals of Machine Component Design, 4/E by Robert C. Juvinall and Kurt M. Marshek Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved. Figure 10.3 (p. 389) Tolerance zones for various classes of unified threads. Note: Each class – 1, 2, and 3 – uses a portion of the zones shown.

Fundamentals of Machine Component Design, 4/E by Robert C. Juvinall and Kurt M. Marshek Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved. Figure 10.4 (p. 389) Power screw thread forms. [Note: All threads shown are external (i.e., on the screw, not on the nut); d m is the mean diameter of the thread contact and is approximately equal to (d + d r )/2.]

Fundamentals of Machine Component Design, 4/E by Robert C. Juvinall and Kurt M. Marshek Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved. Table 10.3a (p. 390) Standard Sizes of Power Screw Threads (Continued on next slide.)

Fundamentals of Machine Component Design, 4/E by Robert C. Juvinall and Kurt M. Marshek Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved. Table 10.3b (cont.)

Fundamentals of Machine Component Design, 4/E by Robert C. Juvinall and Kurt M. Marshek Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved. Figure 10.5 (p. 391) Weight supported by three screw jacks. In each screw jack, only the shaded member rotates.

Fundamentals of Machine Component Design, 4/E by Robert C. Juvinall and Kurt M. Marshek Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved. Figure 10.6 (p. 391) Screw thread forces.

Fundamentals of Machine Component Design, 4/E by Robert C. Juvinall and Kurt M. Marshek Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved. Figure 10.7 (p. 394) Comparison of thread angles measured in axial and normal planes (  and  n ).

Fundamentals of Machine Component Design, 4/E by Robert C. Juvinall and Kurt M. Marshek Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved. Figure 10.8 (p. 396) Efficiency of Acme screw threads when collar friction is negligible. (Note: Values for square threads are higher by less than 1 percent.)

Fundamentals of Machine Component Design, 4/E by Robert C. Juvinall and Kurt M. Marshek Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved. Figure 10.9 (p. 397) Ball bearing screw assembly with a portion of the nut cut away to show construction. (Courtesy Saginaw Steering Gear Division, General Motors Corporation.)

Fundamentals of Machine Component Design, 4/E by Robert C. Juvinall and Kurt M. Marshek Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved. Figure (p. 398) Screw jack lifting a nonrotating load.

Fundamentals of Machine Component Design, 4/E by Robert C. Juvinall and Kurt M. Marshek Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved. Figure (p. 402) Bolt with pilot surface.

Fundamentals of Machine Component Design, 4/E by Robert C. Juvinall and Kurt M. Marshek Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved. Figure (p. 403) Alternative screw press arrangements.

Fundamentals of Machine Component Design, 4/E by Robert C. Juvinall and Kurt M. Marshek Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved. Figure (p. 404) Basic threaded fastener types.

Fundamentals of Machine Component Design, 4/E by Robert C. Juvinall and Kurt M. Marshek Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved. Figure (p. 405) Some common screw (and bolt) head types.

Fundamentals of Machine Component Design, 4/E by Robert C. Juvinall and Kurt M. Marshek Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved. Figure (p. 405) "Tamper-resistant" screw heads.

Fundamentals of Machine Component Design, 4/E by Robert C. Juvinall and Kurt M. Marshek Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved. Figure (p. 412) Common types of lock washers.

Fundamentals of Machine Component Design, 4/E by Robert C. Juvinall and Kurt M. Marshek Copyright © 2006 by John Wiley & Sons, Inc. All rights reserved. Figure (p. 412) (a) Slotted and (b) castle nuts. Each is also shown with a drilled bolt and cotter pin.