Bearings. Which knife has the largest

[marchone]

Here is a relevant thread from 2016. It illustrates the various bearing types, especially as used by Shirogorov. I have a project folding knife I will eventually get the proper size bearings for, so therein lies my interest.

https://www.bladeforums.com/threads/show-us-your-bearings.1409394/

 

[Mo2]

The bearings in my crappy brous silent soldier frame lock flipper are gigantic in comparison to all other caged bearings. It's as if two or three normal bearings were combined to make the size of them.

The track themselves is not wide though. I belive they are like ikbs. No cage.

 

[marrenmiller]

The balls or the rings they ride in?

@ vanadium What’s the story with roller pin bearings? Do they not have to drag because velocity differance between the bearing end closer to the centre of rotation vs the side on the outside further from the centre.

Yes, they would have some slip inherent to the beating design.

 

[Lesknife]

Which is harder to roll forward a foot: A 20ft steel beam laying on two pipes, or one laying on 20 pipes? More contact does not always mean less resistance. But which one will roll smoothly and not dig itself into the soft Earth while holding up one side of your car? Aha.

That depends on the hardness of the bearing metals. Similar to a tire the softer it is the more resistance to roll as compared to a tire at max psi. As long as the metal doesn’t mash the more contact the less distortion or flex the the friction. That’s just the way bearings work hence the name “bearing “.

 

[kniferbro]

Girth and Surface contact area > Ball size

Heh

 

[Minh762]

Here is a relevant thread from 2016. It illustrates the various bearing types, especially as used by Shirogorov. I have a project folding knife I will eventually get the proper size bearings for, so therein lies my interest.

https://www.bladeforums.com/threads/show-us-your-bearings.1409394/

Great thread, thanks for sharing. IMO, OP missed the opportunity to name it 'Show us your balls'

 

[marchone]

Someone slipped in a video of ACDC to cover for that.

 

[marthinus]

Greatly depends on stop pin, detent ball and lock location to determine the circumference of the bearing track. Largest I have done is 12 mm from center of pivot.

 

[vanadium]

Greatly depends on stop pin, detent ball and lock location to determine the circumference of the bearing track. Largest I have done is 12 mm from center of pivot.

+1. This is another reason that washers remain an attractive solution: They don't need to be round, or rotate, so you can increase the distance from the center of rotation asymmetrically and opportunistically.

 

[kniferbro]

+1. This is another reason that washers remain an attractive solution: They don't need to be round, or rotate, so you can increase the distance from the center of rotation asymmetrically and opportunistically.

Why so much grease and on the wrong side of the washer

 

[vanadium]

Why so much grease and on the wrong side of the washer

Beats me! Not my photo.