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Question about Columbus 18s Amplitude "Click" to Login or Register 
posted
Have a problem getting columbus Amplitude past 180 degrees tried everything is this normal for these old movements thay say balance Amplitude should be 270 degrees but no matter what I do can't achieve this ideas or advise?
 
Posts: 68 | Location: New South Wales, Australia | Registered: June 21, 2015
IHC Member 1650
posted
How many jewels?

I find that the lower the number of jewels, the lower the amplitude will be. For 18 size watches, I don't usually get as high amplitude as for 16 size watches. I get the highest amplitude for 16s railroad grade watches - such as 992B and Bunn Specials.

Also, the more worn the movement, the lower the amplitude. Sometimes there is only so much you can do.

Keep in mind I'm not an expert. Maybe an expert will weigh in with their experiences.
 
Posts: 348 | Location: Illinois in the USA | Registered: November 17, 2011
posted
Movement is 17 jewel I have checked everything I can think of is consistent dial up and down
 
Posts: 68 | Location: New South Wales, Australia | Registered: June 21, 2015
IHC Member 2075
posted
Hi Jeff , a few things that happen to me are the hairspring is not between the regulator pins ,dirty hairspring(coils sticking) wrong roller jewel , but most often is dirty jewels , pull it back apart and go through it again . This illinois was coated in hard green oil , it went through the washer twice and soaked , but still would not run right until I did it a third time and pegged the jewels again, let us know what happened .

 
Posts: 1574 | Location: Maryland in the USA | Registered: June 04, 2015
posted
Thanks Kevin
Cleaned and pegged all jewels again still same issue
Changed Mainspring
adjusted hairspring stud for hairspring clearance
Cheked and lubricated pallet jewels
Checked drive chain end shake
balance wheel end shake
Balance motion looks excellent by eye and watch is keeping time dial up and down
Maybe I should leave well enough alone would have liked to see Amplitude improve and I wonder what I might be missing
It seems easy at this point to question the timing machine even though a lot of other movements show 270 degrees plus but quite a few are showing a lot less when they look fine strong movement
Any ideas appreciated
 
Posts: 68 | Location: New South Wales, Australia | Registered: June 21, 2015
IHC Member 2075
posted
In that case refer to Doug ! Smile , I have to agree that some just do not have great "swing" .
 
Posts: 1574 | Location: Maryland in the USA | Registered: June 04, 2015
posted
Have had trouble with columbus and us watch co with Amplitude illinois hamilton and Waltham no trouble wondering if others finding same
 
Posts: 68 | Location: New South Wales, Australia | Registered: June 21, 2015
IHC Life Member
Certified Watchmaker
Picture of Chris Abell
posted
So many thing that could cause this problem (too many to list)but I would add the many Columbus I have worked on over the years are notoriously problematic some are just not practical to continue trying and cant be fixed without access to new parts.
 
Posts: 2610 | Location: Northeast Texas in the USA | Registered: November 20, 2003
posted
Yeh thanks again Chris tried everything I could think of and kept coming back same poor Amplitude just couldn't get through that doorway
 
Posts: 68 | Location: New South Wales, Australia | Registered: June 21, 2015
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