Graflex.org Forum Index Graflex.org
Get help with your Graflex questions here
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Graflex RB 4X5 modifications
Goto page Previous  1, 2
 
Post new topic   Reply to topic    Graflex.org Forum Index -> Reflex Help
View previous topic :: View next topic  
Author Message
C. Henry



Joined: 13 Dec 2005
Posts: 360
Location: North East Georgia, USA

PostPosted: Fri Nov 01, 2013 1:46 pm    Post subject: Reply with quote

I would like to suggest the use of "T-nuts" instead of the double hex nuts on this type of a modification. The advantage would be that a loose mounting screw could be tightened from the outside of the camera with out the need to hold the nuts inside the camera.

C. Henry
Back to top
View user's profile Send private message
Milos Gazdic



Joined: 18 Jul 2013
Posts: 19
Location: Belgrade, Serbia

PostPosted: Fri Nov 01, 2013 4:18 pm    Post subject: Reply with quote

If T-nut is what I think it is (small nut with the pins / arms penetrating wood) then I am afraid they could cause some trouble to quite sensitive wood structure inside camera - wouldn't they?
_________________
Milos Gazdic | www.hirtc.com
Back to top
View user's profile Send private message
C. Henry



Joined: 13 Dec 2005
Posts: 360
Location: North East Georgia, USA

PostPosted: Fri Nov 01, 2013 5:09 pm    Post subject: Reply with quote

That is something to be considered if the wood has become brittle with age. Another alternative with the same advantage would be to have a blackened brass plate about an eighth of an inch (3mm) thick with tapped holes matching the spacing of the holes in the strap lugs instead of the double nuts.

C. Henry
Back to top
View user's profile Send private message
Jim C.



Joined: 18 Feb 2011
Posts: 89

PostPosted: Fri Nov 01, 2013 6:13 pm    Post subject: Reply with quote

The miirror may collide with the flange of the T-nut, unless you grind
the flange where it may protrude into the mirroe area.
A better solution would be to use threaded inserts, press in or screw in
depending on the condition of the wood.

http://www.mcmaster.com/#standard-threaded-inserts/=p6xhta

look at the Tapping Inserts for Wood
Back to top
View user's profile Send private message
45PSS



Joined: 28 Sep 2001
Posts: 4081
Location: Mid Peninsula, Ca.

PostPosted: Fri Nov 01, 2013 7:18 pm    Post subject: Reply with quote

All these options require a much larger hole in the camera starting with the barbed insert which requires a hole 50% larger than the threaded fastener size it made for. 3 flute barbed inserts are worse for splitting the wood than 4 flute ones. They should screw in with a hex wrench. A T nut installed inside the body so that the strap lug screw pulls the chiseled spikes into the wood as the strap lug is tightened could work and the body length could be shortened but splitting the wood is a real possibility. A surface mount insert could be used from either the inside or outside and retained with #0, #1, or #2 flat head brass screws depending on the insert.

Painting a single machine nut once installed should seal and lock the threads preventing it from coming loose.
_________________
The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU.
Back to top
View user's profile Send private message Visit poster's website
Erik Gould



Joined: 24 Jul 2014
Posts: 23
Location: Pawtucket

PostPosted: Thu Jul 24, 2014 6:37 pm    Post subject: Reply with quote

Excellent job, great ideas. I've been thinking about adding a miniscus lens as an option, thanks for the inspiration.
Back to top
View user's profile Send private message Send e-mail Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic    Graflex.org Forum Index -> Reflex Help All times are GMT
Goto page Previous  1, 2
Page 2 of 2

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group