THE CHALLENGE
A customer we were working with was manufacturing ST52 carbon steel high-pressure tubes using ECOCA SJ-25B CNC Lathe. The shaft lengths were 36.61” (930mm) and 20.79” (528mm), and the shaft diameter was 0.59” (15mm). This part required a surface finish of 7 Ra microinch (0.18 Ra). Before they turned to us, here was their pre-op process:
Turning Operation prior to burnishing:
- Speed: 2,500 RPM (0m/min)
- Cutting feed: 0.008” per rev (0.2 mm/rev)
- Achieved finish: 24-32 Ra microinch (0.6-0.8 Ra)
OUR SOLUTION
Once the customer contacted us, we suggested using a S2121-00M Single Roll Carbide Burnishing Tool made by Elliott Tool Technologies.
Here were the statistics for this burnishing solution:
- Speed: 2,500 RPM (0m/min)
- Cutting feed: 0.002” per rev (0.05mm/rev)
- Radial load: 0.5mm
- Finished achieved: 6-7 Ra microinch (0.15-0.18 Ra)
