proper use of graphite for blades

darinwc

Subscriber
Joined
Dec 14, 2003
Messages
3,146
Location
Sacramento,
Format
Multi Format
I have some sticky shutter blades in an Olympus Pen EED that just seem like they need to be hit with some graphite. The action just is not smooth.
Is there a specific type of graphite to get and what is the best method to apply it?

THX
 

John Koehrer

Subscriber
Joined
Apr 3, 2004
Messages
8,277
Location
Aurora, Il
Format
Multi Format
Ummm, NONE!
If the blades are icky don't make them sticky.
They should be dry as should the housing.
 
OP
OP

darinwc

Subscriber
Joined
Dec 14, 2003
Messages
3,146
Location
Sacramento,
Format
Multi Format
My problem is that I have thouroughly dissasembled and cleaned the blades, but they still require more oomph that I think the little spring can put out reliably. The way this shutter is designed, they rub against the housing quite a bit and I would like to reduce that friction.

so... do I need to 'spray' a little graphite between them and leave a little 'dust' there for it to work? -or do I have to rub it onto the blades and then blow the excess dust away?
 
OP
OP

darinwc

Subscriber
Joined
Dec 14, 2003
Messages
3,146
Location
Sacramento,
Format
Multi Format
OK heres the deal with graphite: It's messy stuff! The little tube it came in squirts irregular amounts and it gets all over.
Use it in a separate work area than where you dissasembled your camera!

What I ended up doing was squiting some into a plastic film container. I dipped the tip of a Q-tip into the stuff and then tapped it on the edge (like a cigarette) to remove the excess.

With the shutter assembly -completely- dissasembled and removed each blade individually. I used the Q-tip to rub the graphite onto the surface of each side of each blade. It grayed the surface a little, kinda the shade of a pencil mark.
I also hit the shutter housing in this case.

After I was done, I blew away all the graphite dust, twice, before I reassembled the shutter mechanism.

Did it work? I think so. The action is improved, but it was not a huge difference.
I would not reccomend this for most shutters, but in the case of this olympus pen eed I was working on, the mechanism is very weak.
 

pnance

Member
Joined
Apr 25, 2005
Messages
189
Format
35mm
In the olden days, as a Linotype operator, we would polish the spacing tabs with graphite. This was done by taking the spacers and rubbing them on a board with graphite. I wonder if polishing the aperature blades this way, then wiping them clean would help remove the stickyness? Hopefully the wiping would remove any loose graphite.
 

archphoto

Member
Joined
Dec 14, 2008
Messages
960
Location
Holland and
Format
4x5 Format
I once new a camera repairman that put graphite and blades into a rotating tumbler used for polishing rocks.
In that way the blades got covered with a thin layer of graphite, so it makes some sense.
I did it a couple of times by rubbing the blades with Qtips and graphite.
It might help, but be shure to use an even underground when you do it.

Peter
 

Philippe-Georges

Subscriber
Joined
Apr 11, 2005
Messages
2,672
Location
Flanders Fields
Format
Medium Format
You do not have to believe me, but, a long time ago, in the Hasselblad factory, there was a kind of a rotating cylinder (like a concrete mill in miniature, a tumbler as Archphoto told?) with hard rice grains in (the one they eat in China) and the tiny parts got polished during a long time in it. I wonder if some kind of rice powder might do the job for you...

Good luck,

Philippe
 
Joined
Oct 25, 2004
Messages
1,057
Location
Westport, MA
Format
Large Format
I like to take a small amount of rubbing alcohol, 70+% iso or similar (not acetone, lighter fluid has worked for me in a pinch too) and mix it with a small amount of graphite. You want an almost slightly runny paste.. I dab a q-tip in and gently swab the blades, let dry and fire it over and over again. Shake it out/etc. You don't want graphite floating around.

YMMV.. it helped an older graphex shutter for a while but the real problem was the spring. Eventually all speeds faster than 1/30th or so fired at the same speed (like 1/30th), but all the slower speeds work fine. 1/1 is like 2/1.
I still use it, amazingly.. the glass looks like someone (not me!) cleaned it with a brillo pad or took it to the beach. Ah well.
 

removed account4

Subscriber
Joined
Jun 21, 2003
Messages
29,832
Format
Hybrid

interesting notion that rice might be of some help.
sounds good to me!

at the coffee shop i worked at, we sold burr grinders/coffee mills
and it is recommended that one puts uncooked/raw white rice through
the grinder to clean off the burrs -- if / when they get gummed up from
oily coffee beans ..
 
OP
OP

darinwc

Subscriber
Joined
Dec 14, 2003
Messages
3,146
Location
Sacramento,
Format
Multi Format
at the coffee shop i worked at, we sold burr grinders/coffee mills
and it is recommended that one puts uncooked/raw white rice through
the grinder to clean off the burrs -- if / when they get gummed up from
oily coffee beans ..

Wow thats a really good idea.. I have a small grinder at home i have to clean periodically.
 
Cookies are required to use this site. You must accept them to continue using the site. Learn more…