Graflex.org

peter k · Joined: 26 Dec 2009 Posts: 207 Location: Sedona Az

Is there any problem of drilling larger hole into the existing threaded slot, so as to drill out the what remains of the existing screw shank?

Or are the old screws, stainless steal?

peter k · Joined: 26 Dec 2009 Posts: 207 Location: Sedona Az

At:

http://graflex.org/manuals/4x5-Anniversary-Speed-Graphic.pdf

3c ... it states for "Screw retaining strip (3/16" #2 OH Parker Kalon)

Do I have the right reference?
Surely these screws where longer than 3/16"?

Or am I misreading?

45PSS · Posted: Tue Jun 19, 2012 3:35 am Post subject:

Anniversary Speeds, 4x5 format, use T nut inserts and it is assumed the 3x4 does also. The 4x5 appears to have the threaded inserts pressed in and the front standard is plastic (Bakelite?)

Therefore it is not advisable to drill the insert oversize.

The lensboard slide lock screw on the 4x5 is a #1-64, .25 inch total length, .045 head thickness (fillister head closest style I can find), .08 shoulder.

Tap drill for a #1-64 is a #53 drill bit.

Get a Pin Vise and a #53 drill bit and center drill the screw out, the thread shell will be easy to remove.

Using a 1.4 or smaller slot type jewelers screwdriver keep the tip 90° (right angle) to the thread and push to the left (counterclockwise), the screw may unscrew if it is not seized or bottomed.

Pin Vise:
http://www.amazon.com/s/ref=nb_sb_ss_c_1_8?url=search-alias%3Dtools&field-keywords=pin+vise&sprefix=pin+vise%2Caps%2C303

#53 drill bit:
http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Daps&field-keywords=%2353+drill+bit
_________________
The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU.

45PSS · Posted: Tue Jun 19, 2012 3:39 am Post subject:

peter k · Joined: 26 Dec 2009 Posts: 207 Location: Sedona Az

45PSS · Posted: Tue Jun 19, 2012 6:09 am Post subject:

Henry · Posted: Tue Jun 19, 2012 12:18 pm Post subject:

Good luck finding the 1-64. The common thread is 1-72 in model railroad work. The sequence goes 5-32, 4-40, 3-48, 2-56, 1-72, 0-80, 00-90.

peter k · Joined: 26 Dec 2009 Posts: 207 Location: Sedona Az

Found some on internet, have to buy by the box of 100, .25" length under head, in stock.
Available in alloy steel or stainless steel, which in fact is cheaper, which is odd..

Would the stainless steel be a better replacement?

~~~~~
Now to get the old out

45PSS · Posted: Tue Jun 19, 2012 6:48 pm Post subject:

Get the old out first then find some new ones. You might be able to tap the inserts to 2-56 and modify the slots in the slide lock to fit the larger screw. Graflex might have used a different screw size in the 3x4 also.

I would go with Brass or Stainless Steel for the metal type as zinc plated steel will eventually rust.
_________________
The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU.

peter k · Joined: 26 Dec 2009 Posts: 207 Location: Sedona Az

Well Ace had a #53 bit, but not a Pin Vise
Came home and dug around and found old grandpa's hand drill, with wood vertical handle with bits inside. Tall guy with hand crank, and gears.
Lovely!
Had to lube it up with 3 in One oil, but was perfect for the job, as all the weight is centered on the bit. Bet the drill is older than the camera by a bit.

Gave it a try, out in the sun's light, and it self centered, and the darn screws turned out to be brass. That was a surprise, as looking under the magnifying glass, of the broken end of the screw, it looked like metal.
Drilled out with the magnifying glass, can see the threads in there, but I don't believe there is a metal insert, just backelite.
Found some brass 1-64's, just had to buy 50, so were in duck soup and see how they fit when they arrive.

Thanks for all the help, will post when we complete the repair.

Henry · Posted: Tue Jun 19, 2012 7:36 pm Post subject:

I just googled up "pin vise," and got this hit:
http://www.staples.com/General-Tools-Swivel-Head-Pin-Vises-5-16-x-4-inch/product_581050?cid=PS:GooglePLAs:Cleaning_/_Facilities_/_Safety:Safety_Supplies:581050:318-92

I never thought Staples would carry such an item!

peter k · Joined: 26 Dec 2009 Posts: 207 Location: Sedona Az

Got the 1-64's, small brass screws with a Phillips head, shortest I could get them was 1/4", which was a little long. No problem, went to ace and a nut for a 1-72 will tread on, easily, and act as a spacer and also makes a little wider head to hold the metal plate on.

Were back in business.

Got 48 of these little darlings left.. if anybody has a need, e-mail me with your address, and I'll mail ya a couple.

45PSS · Posted: Fri Jun 22, 2012 10:57 pm Post subject:

Tip: screw 2 nuts onto the screw you need shorter. Position the nut closest to the end of the screw at the length from the head that you need and tighten the second nut against the first. Cut the screw next to the front nut with a fine blade hacksaw or cutoff wheel in a rotary tool. Unscrewing the nuts will remove any burs. If the screw did not cut smoothly dress it with a file before removing the nuts.
_________________
The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU.

peter k · Joined: 26 Dec 2009 Posts: 207 Location: Sedona Az

Absolutely.. been there done that, but difficult when you have no 1-64 nuts.

45PSS · Posted: Sat Jun 23, 2012 1:40 am Post subject:

Tip #2: more difficult than tip 1. Use a Taper file and follow the thread of the screw from 1 to 2 turns above the cut to the cut keeping a V of the file centered in the thread.
_________________
The best camera ever made is the one that YOU enjoy using and produces the image quality that satifies YOU.