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Message |
    
Salil
Tinkerer
Username: Salil
Post Number: 1
Registered: 12-2010
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, December 30, 2010 - 12:40 pm: | 
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When I was trying to de-click my 85mm f1.8 Nikkor lens I couldn't get one of the parts out that triggors the aperture so I remove this top plate on it which I soon realized held a ring in place that holds the ball bearings in. Anyway, long story short, all the ball bearings dropped once this part was removed. I collected what think is all the ball bearings including the ones that were stuck in the lens. Now the issue is how do I get the ball bearings back in this ring and re-assembly?!
Any suggestions would be greatly appreciated. I know this was a stupid move on my part. |
Monopix
Tinkerer
Username: Monopix
Post Number: 183
Registered: 11-2008
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, December 31, 2010 - 08:54 am: |
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No experience of the lens and with no picture it's difficult to help but, generally speaking, sticking the ball bearings into place on one of the parts with a small amount of grease usually makes assembly of such items easier. |
Glenn
Tinkerer
Username: Glenn
Post Number: 879
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, December 31, 2010 - 09:17 am: |
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If these ball bearings serve the same function as those in the Canon FD 1.4 type mount mechanism - ie they support the function levers that interface lens to body - then they do not like grease, the mechanism is made to run dry.
Search on line for the relevant repair manual, there will be one out there somewhere. |
Glenn
Tinkerer
Username: Glenn
Post Number: 880
Registered: 07-2006
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, December 31, 2010 - 09:19 am: |
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If these ball bearings serve the same function as those in the Canon FD 1.4 type mount mechanism - ie they support the function levers that interface lens to body - then they do not like grease, the mechanism is made to run dry.
Search on line for the relevant repair manual, there will be one out there somewhere. |
Mattboston
Tinkerer
Username: Mattboston
Post Number: 19
Registered: 01-2009
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, December 31, 2010 - 02:03 pm: |
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Ouch!
I took apart my first Nikon (pre-ai) lens a few weeks ago- and if you are talking about the bearings near the mount flange that the aperture return lever rides on, then you have a job ahead of you.
I remember taking off the rear flange to get at the lens, as soon as I lifted that piece and saw all of the bearings I just thought "if these fall on the floor, I am throwing the lens away."
I got lucky and the bearings stayed in place- but good luck with the re-assembly.
ps- while using grease to hold bearings in place for re-assembly is usually a good idea, these bearings need to move quickly, and grease would prevent them from doing so. |
