Machinery's Handbook 25
Machinery's Handbook 25
(OP)
I just bought Machinery's handbook 25 since it was decently priced, but in searching through it, I'm not seeing simple stuff like clearances holes for inch fasteners. Everything seems metric. I have a copy of 28 available at work and it does have all this. Does anyone else know if this just wasn't printed in this version? Am I missing it?
Thanks for the help!
Thanks for the help!





RE: Machinery's Handbook 25
John R. Baker, P.E. (ret)
EX-Product 'Evangelist'
Irvine, CA
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RE: Machinery's Handbook 25
RE: Machinery's Handbook 25
Dan - Owner
http://www.Hi-TecDesigns.com
RE: Machinery's Handbook 25
My 30th eon is that way, so I am going to say no, they did not fix it.
RE: Machinery's Handbook 25
I don't have either edition to compare, but some tables are for Socket Head Cap Screws, some for Cap Screws.
There is the possibility some are based on different standards, like ASME B18.2.8, NAS618, but the STD should be identified. https://forum.solidworks.com/servlet/JiveServlet/s...
RE: Machinery's Handbook 25
RE: Machinery's Handbook 25
"Tap Drills and Clearance Drills for Machine Screws with American National Thread Form" and covers screw sizes from #0 to 1/2 inch. It's marked table #4 and is found in the chapter titled "Threads and Threading", sub-section "Tapping and Thread Cutting" (which admittedly appears to be an odd place to include 'clearance hole' specs).
And before anyone asks, there was NO specific standard referenced by this table.
John R. Baker, P.E. (ret)
EX-Product 'Evangelist'
Irvine, CA
Siemens PLM:
UG/NX Museum:
The secret of life is not finding someone to live with
It's finding someone you can't live without
RE: Machinery's Handbook 25
"American National Thread Form"???
Not UNC?
--
JHG
RE: Machinery's Handbook 25
John R. Baker, P.E. (ret)
EX-Product 'Evangelist'
Irvine, CA
Siemens PLM:
UG/NX Museum:
The secret of life is not finding someone to live with
It's finding someone you can't live without
RE: Machinery's Handbook 25
I don't have my 1941 copy of French's with me. I believe that was the screw standard in the USA prior to WWII.
--
JHG
RE: Machinery's Handbook 25
John R. Baker, P.E. (ret)
EX-Product 'Evangelist'
Irvine, CA
Siemens PLM:
UG/NX Museum:
The secret of life is not finding someone to live with
It's finding someone you can't live without
RE: Machinery's Handbook 25
Found it! Page 1900 in the 26th edition, Table 4.
Still, they are quoting American National Standard thread form. Table 2 on page 1891 is Recommended Hole Size Limits Before Tapping Unified Threads. Strictly speaking, the major diameters are the same. The thread form should not affect the clearance hole.
--
JHG
RE: Machinery's Handbook 25
TTFN (ta ta for now)
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RE: Machinery's Handbook 25
RE: Machinery's Handbook 25
RE: Machinery's Handbook 25
No change to John Baker's 15th and 25th edition
RE: Machinery's Handbook 25
I am not surprised it has not changed. The standard is obsolete.
--
JHG