Oil on the aperture blades in Nikkor Pre-Ai 50mm 1:2

mikeno62

There was not so much oil on the aperture blades in my old Nikkor Pre-Ai 50mm 1:2, but the aperture system and the aperture blade was on the way to be a little sticky.

It’s not that “hard” to open the aperture assembly, just REMEMBER to set small marks BEFORE DISASSEMBLE the aperture assembly, it will help you to put it all thing’s correct in again, so the aperture value is correct.

The aperture blades was put in in a little different way than other Nikkor lenses, that’s why I made some small errors, but I corrected them at the same time I found out what was wrong.

I use Isopropylalcohol 99% to clean the aperture system and the aperture blades.

And I also use my home made rubber tool to unscrew the narrow front ring on the focus ring.

Here are some link’s to different repair tool’s:

Japan Hobby Tool rubber cone:

https://www.amazon.com/Japan-Vacuum-Camera-Opener-Repair/dp/B0013HFYKK/ref=pd_sbs_469_1?_encoding=UTF8&pd_rd_i=B0013HFYKK&pd_rd_r=RKSF5A4YKT9GV3E1382C&pd_rd_w=5H58m&pd_rd_wg=DBny2&psc=1&refRID=RKSF5A4YKT9GV3E1382C

18 different size rubber repair tool’s:

https://www.amazon.com/Sizes-Lens-Filter-Wrench-Rubber/dp/B00988D1BK/ref=pd_sbs_469_2?_encoding=UTF8&pd_rd_i=B00988D1BK&pd_rd_r=RKSF5A4YKT9GV3E1382C&pd_rd_w=5H58m&pd_rd_wg=DBny2&psc=1&refRID=RKSF5A4YKT9GV3E1382C

Divider Caliper Wing Compass:

https://www.amazon.co.uk/Divider-Caliper-Compass-Marking-Machinist/dp/B015CN9A8M

You can also buy this set.

Lens Repair Set with pointed, flat, half flat tips:

https://www.amazon.com/dp/B00QRPWCN0/ref=psdc_3347581_t1_B00J5F6O92

JIS cross head screw driver’s:

https://www.amazon.com/Moody-Tools-58-0219-Chromium-Screwdriver/dp/B004PGO1T6/ref=pd_sim_421_6?_encoding=UTF8&pd_rd_i=B004PGO1T6&pd_rd_r=775KBDR03D8PMMEZWKFJ&pd_rd_w=ti7yC&pd_rd_wg=s2a40&psc=1&refRID=775KBDR03D8PMMEZWKFJ

Or this set, that is the set I use:

https://eustore.ifixit.com/en/Tools/Drivers-Wrenches/JIS-Driver-Set.html?utm_source=iFixit&utm_campaign=Referral&utm_medium=modal&utm_content=145115

Lens cleaning wipes (PEC-PAD):

https://www.amazon.com/dp/B0161VIZZ8/ref=sspa_dk_detail_3?psc=1&pd_rd_i=B0161VIZZ8&pd_rd_wg=ZTxxY&pd_rd_r=RNY8S6Q1V5K18K3F61VZ&pd_rd_w=2c1Oy

Source