Balance Wheel

[toptime810]

Hello, can anyone tell me why my balance wheel hole is bigger than the staff replacement that is for that balance. I was trying to fit it with a staffing tool but could not get it to make a rivet on the wheel.

[jdm]

Maybe the staff replacement was turned or stocked incorrectly, or made for a different revision of the same movement.

Edited March 5, 2016 by jdm

[toptime810]

I was going to restaff it but decided to buy the entire balance assymbely on ebay.

[StuartBaker104]

How did you remove the old staff? Did the balance wheel hole get damaged in the process?

S

[toptime810]

Very carfully with a staking set#18 but the hairspring collet give me trouble and the roller was loose on the new one staff also.

[Mark]

...or made for a different revision of the same movement.

This is the most likely reason.

Sent from my iPhone using Tapatalk

[toptime810]

Here is the old and the new balance. One looks bigger to me you might have to zoom in

[toptime810]

I need to learn how to measure these staffs :geek:

[jdm]

I need to learn how to measure these staffs :geek:

 

Need a micrometer, starting $10

http://www.aliexpress.com/item/FREE-SHIPPING-0-25mm-0-01mm-Measureing-Tool-External-Diameter-Mechanist-Micrometer-Caliper/1914118414.html

 

A pittance compared to what it used to cost in Western markets, ages ago.