B1.5 - Acme Screw Threads
Description: This Standard provides for two general applications of Acme threads: namely, general purpose and centralizing. The limits and tolerances in this Standard relate to single-start Acme threads and may be used, if considered suitable, for multiple-start Acme threads. The latter threads are used to provide relatively fast traversing motion when necessary. The three classes (2G, 3G, and 4G) of general purpose threads have clearances on all diameters for free movement. This thread relies on the thread flanks to maintain concentric operation. The three classes of centralizing threads have a limited clearance at the major diameters of the external and internal threads so that a bearing at the major diameter maintains approximate alignment of the thread axis and prevents wedging on the flanks of the threads. compatible in all significant respects with both the Unified and ISO basic thread profiles. Thus, this thread series establishes interchangeability with the corresponding sizes in both the American-British-Canadian and ISO Standardization programs.
Category: ASME Engineering Standards Specifications
Download Not Available
© Copyright 2000 - 2012, by Engineers Edge, LLC All rights reserved.
Disclaimer
|
