Doug T.
Lifetime Member
Pettin' The Gator
Posts: 1,199
|
Post by Doug T. on Feb 25, 2012 13:52:03 GMT -5
Hi All! I went to the, by now, infamous book sale today and picked up several books on photography, one on old dolls, and a couple of novels. The most interesting thing I discovered, however, is that our local libraries' web site has made over 30k books available to download for free  I haven't checked it out yet, but will do so later on today when I have a more time. Now I've got to go pick the flying dog at the groomers. Doug |
|
daveh
Lifetime Member
Posts: 4,696
|
Post by daveh on Feb 25, 2012 18:45:28 GMT -5
The flying dog: one of the great photos of last year!  That's interesting about the libraries. 30,000 books - that should keep you in reading for a week or two. |
|
|
|
Post by grenouille on Feb 26, 2012 5:19:28 GMT -5
Just added The Ultimate Ashai Pentax Screw Guide by Gerjan Oosten to my library of Photo Books
Hye
|
|
daveh
Lifetime Member
Posts: 4,696
|
Post by daveh on Feb 26, 2012 6:02:04 GMT -5
Just added The Ultimate Ashai Pentax Screw Guide by Gerjan Oosten to my library of Photo Books Hye I'll be testing you later on Whitworth, BSF and BSP! |
|
|
|
Post by grenouille on Feb 27, 2012 8:51:55 GMT -5
Sorry Daveh, what's Whitworth, BSF and BSP
Hye
|
|
daveh
Lifetime Member
Posts: 4,696
|
Post by daveh on Feb 27, 2012 20:28:59 GMT -5
Hye, They are old screw threads used before those horrible metric (and other) people came along and forced us to use their systems such as UNC, UNF, Metric etcetera. Whitworth is more correctly British Standard Whitworth, BSW for short - (but always call Whitworth). . BSF = British Standard Fine, BSP = British Standard Pipe . Perhaps it wasn't this sort of thread Pentax had in mind. |
|
mickeyobe
Lifetime Member
Resident President
Posts: 7,280
|
Post by mickeyobe on Feb 27, 2012 23:38:06 GMT -5
From now on I will look at a screw with great new respect.
Mickey
|
|
|
|
Post by John Farrell on Feb 28, 2012 1:03:06 GMT -5
BSP is still alive and well - just about all plumbing fittings in New Zealand use this thread.
When we went metric, they just changed the names - 1/2" became 15mm, 3/4" became 20mm.
|
|
daveh
Lifetime Member
Posts: 4,696
|
Post by daveh on Feb 28, 2012 3:24:52 GMT -5
What is finally killing all of the threaded fittings is the push-fit plastic system. In terms of the pipe size the observant amongst you may have noticed that 1/2" is 12.7mm and not 15mm - yet the two are fully interchangeable. The reason is, and it gets really interesting here  , one is the internal diameter of the pipe and the other is the external diameter. 3/4" pipe is not quite fully interchangeable with 20mm - different sized olives are needed for compression fittings. |
|
mickeyobe
Lifetime Member
Resident President
Posts: 7,280
|
Post by mickeyobe on Feb 28, 2012 5:55:20 GMT -5
From now on I will look at a screw with great new respect. Mickey
"-different sized olives are needed for compression fittings. "
And olives now garner my due respect. Are they whole, pitted or stuffed? Green? Black? I guess this thread will soon wander into hors d'oeuvres. Or martinis. Mickey |
|
|
|
Post by grenouille on Feb 28, 2012 12:36:39 GMT -5
Thanks for the info Daveh. Wonder if the Pentax thread is in Metric or Imperial units.
Regards
Hye
|
|
daveh
Lifetime Member
Posts: 4,696
|
Post by daveh on Feb 28, 2012 14:49:09 GMT -5
Mickey, just to let you know it's cocktail hour.
Hye, this is a great forum for picking up all sorts of useless information.
Dave.
|
|
|
|
Post by grenouille on Mar 5, 2012 5:33:32 GMT -5
Dave, I do pick up quite a lot of useful information on this site, love some of the wise cracks as well, keep them coming, Regards
Hye
|
|
, one is the internal diameter of the pipe and the other is the external diameter. 3/4" pipe is not quite fully interchangeable with 20mm - different sized olives are needed for compression fittings.