Why the change from the proto on the Umnum?

[DrFish]

Any particular reasons why the second ball bearing to prevent lock overtravel was removed from the production umnums? Cost issue?

 

[OD-SnG]

good question i want to know this also

 

[MORIMOTOM]

iirc, crk said that lock over travel, that is, when the lock engages even all the way across, is not indicitave of any problem.

i would assume they thought the extra bearing to be unecessary.

 

[Fooj]

The 2nd ball was not meant to stop over-travel of the lock bar as it is being dis-engaged. In the proto, it provides support under the lock bar in the closed position as the blade stop-lugs are resting on it. In the production version, the stop-lug is resting against the non-lockbar handle slab, thus removing the need for the 2nd ball.

 

[swe]

But I think that the second ball also stops over travel. I don´t want to pressure the lock bar too much but it really works like "over travel stop".