gregormarwick
Diamond
- Joined
- Feb 7, 2007
- Location
- Aberdeen, UK
We have a big steady that uses INA NUTR3580-A track roller bearings.
These have a crowned (extremely slight, hard to tell it's not cylindrical even with a straight edge) outer surface, rather than being completely cylindrical.
However, they are also available in plain cylindrical shell.
The crowned ones we use have a fairly short life before the outer shell gets a bit scarred up in the centre where it contacts the workpiece, and then they get noisy.
Are these the correct bearings? Is there a reason to use crowned rather than cylindrical in a steady? Should we be using cylindrical shell ones instead?
These have a crowned (extremely slight, hard to tell it's not cylindrical even with a straight edge) outer surface, rather than being completely cylindrical.
However, they are also available in plain cylindrical shell.
The crowned ones we use have a fairly short life before the outer shell gets a bit scarred up in the centre where it contacts the workpiece, and then they get noisy.
Are these the correct bearings? Is there a reason to use crowned rather than cylindrical in a steady? Should we be using cylindrical shell ones instead?