Thanks for all the info. I finally found a solution:
1. Rough part leaving .05/side
2. Sub-critical anneal (1250F for 2 hours followed by air cooling)
3. Finish machine
The 2 samples I did still moved a little, .001 out-of-round, but I can live with that!
Now we need to get approval from the...
We are machining some bushings made from S355J0, a structural steel, and having some problems. Here's the deal:
Material: 125mm hot-rolled bar stock
Part: 121mm OD, 106mm ID (+.0016) x 35mm long
Prep: Saw-cut with 3/16" stock on length and pre-drilling a 1-5/16 hole.
We machined one part and...
