Split Nikkormat AW-1 motor shaft gear

Discussion in 'Camera Building, Repairs & Modification' started by sissysphoto, Jul 11, 2018 at 3:45 PM.

  1. sissysphoto

    sissysphoto Member

    Messages:
    71
    Joined:
    Jun 6, 2018
    Location:
    charlotte nc
    Shooter:
    Traditional
    My Nikkormat ELW and winder came today. Looks like the little white nylon gear on the motor shaft of the winder is split. Doesn't seem very likely I'm ever going to be able to dig up a replacement. The motor shaft spins nicely inside the gear. This is a situation.
     
  2. choiliefan

    choiliefan Member

    Messages:
    293
    Joined:
    Dec 27, 2013
    Shooter:
    Medium Format
    A well-tooled machinist can replicate your gear.
     
  3. OP
    OP
    sissysphoto

    sissysphoto Member

    Messages:
    71
    Joined:
    Jun 6, 2018
    Location:
    charlotte nc
    Shooter:
    Traditional
    Oh. Well thanks. I can see that being a couple hundred dollars.
     
  4. shutterfinger

    shutterfinger Subscriber

    Messages:
    2,730
    Joined:
    Feb 25, 2013
    Location:
    San Francisco Peninsul
    Shooter:
    4x5 Format
    3D print one.
     
  5. AgX

    AgX Member

    Messages:
    16,851
    Joined:
    Apr 5, 2007
    Location:
    Germany
    Shooter:
    Multi Format
    Home-printing a gear-part that delicate and stressed?
     
  6. OP
    OP
    sissysphoto

    sissysphoto Member

    Messages:
    71
    Joined:
    Jun 6, 2018
    Location:
    charlotte nc
    Shooter:
    Traditional
    Well, well, well. Looky here. It appears that this may very well be the same little 15 tooth brass gear as used in the MD2 and MD3. Certainly there can't be anything special about it other than the length of the gear and shaft diameter. I wonder if it's just barely possible I can dig one up on the internet somewhere. Watch it turn out to be something you can get a bagful of for peanuts. I should be so lucky.
     
  7. paul ron

    paul ron Subscriber

    Messages:
    2,669
    Joined:
    Jan 22, 2004
    Location:
    NYC
    Shooter:
    Medium Format
    Im sure there is nothing special about that gear. There are hobby shops on line for robotics that sell assorted gears for peanuts by the bag full. Try looking at shops that sell ADRUINO stuff too?

    Google SMALL PLASTIC GEARS

    Once upon a time there was a company called SMALL PARTS. Im not sure if they are still in business.
     
  8. AgX

    AgX Member

    Messages:
    16,851
    Joined:
    Apr 5, 2007
    Location:
    Germany
    Shooter:
    Multi Format
    I never bothered with gears in cameras and lenses so far, so I don not know. But I am not sure at all that japanese makers used a international standard gear shape. (Even the US and european gear shape is different...) And with high numbers any propriatory gear would not cost more. And even if the gear would be standard, the hub likely would be not.
     
  9. Gregorius63

    Gregorius63 Member

    Messages:
    2
    Joined:
    Friday
    Location:
    47992
    Shooter:
    35mm
  10. OP
    OP
    sissysphoto

    sissysphoto Member

    Messages:
    71
    Joined:
    Jun 6, 2018
    Location:
    charlotte nc
    Shooter:
    Traditional
    Thank you for the link, although there were no photos of the gears. And I don't know enough about gears to pick it out. But I do believe the one I need is the same one as the MD3 one. So if I could kindly presume upon you to look on that site and tell me which one, I'd be appreciative. I hope we're talking about gears made to metric specs. Thank you.
     
  11. shutterfinger

    shutterfinger Subscriber

    Messages:
    2,730
    Joined:
    Feb 25, 2013
    Location:
    San Francisco Peninsul
    Shooter:
    4x5 Format
    Outside diameter; inner shaft diameter aka the bore; the height; number of gear teeth, mark one and count them; the pitch of the gear teeth.
    A gear tooth is (EDIT) a triangle, the angle and depth can vary, and the top can be rounded or pointed..
    High School math will suffice even if its rusty.:smile:
     
    Last edited: Jul 13, 2018 at 7:08 PM
  12. mshchem

    mshchem Member

    Messages:
    1,957
    Joined:
    Nov 26, 2007
    Location:
    Iowa City, Iowa USA
    Shooter:
    Medium Format
    Yikes, sounds like a time trap. Try using the camera without the winder until a simple solution presents itself.
     
  13. OP
    OP
    sissysphoto

    sissysphoto Member

    Messages:
    71
    Joined:
    Jun 6, 2018
    Location:
    charlotte nc
    Shooter:
    Traditional
    I waited a long time for a cheapo ELW to come along with winder. I have the camera apart on the table now, headed into the reassembly phase. If I was to use the ELW without the winder, I could have had an EL an long time ago. When you have an ELW, then you use the winder. That's the rule. I'm not going through all this tedious repair work just to have half the camera. You should see the dent work I did on the top cover last night. Masterful. It's always satisfying to do such a good job on paintless dent removal.
     
  14. AgX

    AgX Member

    Messages:
    16,851
    Joined:
    Apr 5, 2007
    Location:
    Germany
    Shooter:
    Multi Format
    Thank you. I thus stand corrected with my scepticism.
    That is good news, as there may be be hope for other gear issues.
     
  15. AgX

    AgX Member

    Messages:
    16,851
    Joined:
    Apr 5, 2007
    Location:
    Germany
    Shooter:
    Multi Format
    A good tool to establish the right teeth is a gear-gauge. It is similar to a thread gauge.
    This one is calibrated in "Module" as are the gears in that shop linked above.
    https://www.fohrmann.com/de/zahnrad-modul-lehre-7-verschiedene-din-5480.html
     
  16. OP
    OP
    sissysphoto

    sissysphoto Member

    Messages:
    71
    Joined:
    Jun 6, 2018
    Location:
    charlotte nc
    Shooter:
    Traditional
    I looked at the link and saw the correct one. Thank you. I'm going to but 3. ! each for my MD2, MD3, and AW1
     
  17. Vilk

    Vilk Member

    Messages:
    476
    Joined:
    Jan 15, 2008
    Location:
    hegeso.com
    Shooter:
    35mm
  18. shutterfinger

    shutterfinger Subscriber

    Messages:
    2,730
    Joined:
    Feb 25, 2013
    Location:
    San Francisco Peninsul
    Shooter:
    4x5 Format
    Nylon gears are lighter and quieter in operation but not as durable over long periods of time.
    Brass gears are heavier, louder in operation but very durable over long periods of time.
    Be sure to lube the brass gear(s) well during assembly.
     
  19. mshchem

    mshchem Member

    Messages:
    1,957
    Joined:
    Nov 26, 2007
    Location:
    Iowa City, Iowa USA
    Shooter:
    Medium Format
    Good Job, I'm too fumble fingered to tackle such a task. I did repair a Hassleblad grip the other day, had to make a custom machine screw, it turned out great. I do love the Nikon stuff. I have a couple MD2 motor drives, pretty neat!
    Best Regards Mike
     
  20. Gregorius63

    Gregorius63 Member

    Messages:
    2
    Joined:
    Friday
    Location:
    47992
    Shooter:
    35mm
    This is the one IP used for my MD-3
    Mod 0.3 16T SGb. Found on Nikon MD3 camera. (1)
     
,