Rob-F
Likes Leicas
About Ball Bearings
About Ball Bearings
I recall from the now-defunct IIIcK thread (I think we can call this one "the IIICK Thread in Exile") that some Leicas had one kind of ball bearings, and later ones had "half race" bearings. I understood "half race" to mean that the balls were not fully encased, but instead were visible on one side of the bearing. (Point #1: is that right?)
Next, I was having this discussion via email with my IIIc technician, John, who says that the actual difference is that in the first application of ball bearings to the IIIc, the cameras had ball bearings on the top and bottom of a shaft (I think he said main shaft); and also on the top and bottom of two tension rollers.
John said that in the later design, he sees the ball bearings only at the top of the one shaft, while all the other points have bushings. My comments about "half-race" meaning that the bearings were not fully enclosed, did not make sense to him.
Am I having a false memory, here?
Another thing: in my notes, I have two slightly different ranges for "half race" cameras: 391800 to 397600; and also 392800 to 397607. Does anyone know which range is correct?
Thanks!
Rob
About Ball Bearings
I recall from the now-defunct IIIcK thread (I think we can call this one "the IIICK Thread in Exile") that some Leicas had one kind of ball bearings, and later ones had "half race" bearings. I understood "half race" to mean that the balls were not fully encased, but instead were visible on one side of the bearing. (Point #1: is that right?)
Next, I was having this discussion via email with my IIIc technician, John, who says that the actual difference is that in the first application of ball bearings to the IIIc, the cameras had ball bearings on the top and bottom of a shaft (I think he said main shaft); and also on the top and bottom of two tension rollers.
John said that in the later design, he sees the ball bearings only at the top of the one shaft, while all the other points have bushings. My comments about "half-race" meaning that the bearings were not fully enclosed, did not make sense to him.
Am I having a false memory, here?
Another thing: in my notes, I have two slightly different ranges for "half race" cameras: 391800 to 397600; and also 392800 to 397607. Does anyone know which range is correct?
Thanks!
Rob