Froneck
Titanium
- Joined
- Dec 4, 2010
- Location
- McClure, PA 17059
I posted a while ago about turning 1-1/2" square rod round on the ends. When chucking the rod in a 4 Jaw chuck and using an indicator as best I could to get the rod concentric a few inches before the square was to be turned round. Problem I had was stress would bow the shaft so that the round was not concentric with the square by quite a bit. Suggest cure was to make a "bushing" to be able to place the square in a steady rest. I managed to buy quite a few bearings from HGR that look new. 3" bore or larger (about size used simple measurement as they are probably metric) Some are Angular contact, Roller and another is Double Row being at least 3" wide. Was thinking of making a bushing from 4" turned to fit bearing then press on a hub on the other side. Drill and tap both sides with 4 adjustment screws and possibly mount the bearing in a steady rest type fixture. Would need at least a 2-1/8" hole thru the bushing.
The round shaft to be turned is 27" long so I will need a live center for support.
That special Steady bearing rest will hold the square as concentric as possible but if I use the standard live center there will be a major bow in the shaft when I remove the center. I'm thinking maybe it would be best to make a live "center" using a 4 jaw chuck rather than a 60° center. Take a few cuts, then readjust the 4 jaw "center". When near finished size (1.250")about1-5/16" center drill the end then finish the shaft between centers (other side being only 4" long) so that both sides are concentric.
Any better ideas? Suggestions??
The round shaft to be turned is 27" long so I will need a live center for support.
That special Steady bearing rest will hold the square as concentric as possible but if I use the standard live center there will be a major bow in the shaft when I remove the center. I'm thinking maybe it would be best to make a live "center" using a 4 jaw chuck rather than a 60° center. Take a few cuts, then readjust the 4 jaw "center". When near finished size (1.250")about1-5/16" center drill the end then finish the shaft between centers (other side being only 4" long) so that both sides are concentric.
Any better ideas? Suggestions??