Bearing bushing
Cycle time improved by 20%.
A German automotive subcontractor was looking for a reliable and consistent solution for chamfering the back edge of a bore in a tube. The inconsistency of the existing solution necessitated a substantial amount of manual rework. Four bores per workpiece must be deburred or chamfered at the back.
| Workpiece | Bearing bushing |
| Bore diameter | 4 mm |
| Outer Tube Ø | 30 mm |
| Inner Tube Ø | 26 mm |
| Chamfer diam. burr free | max. 0.5 mm |
| Material | Steel / 1.0580 E 355 |
| Production volume | 680,000 bores per year |
| Machine | Long turning lathe |
| Processing | Radial processing from the bar |
| Coolant pressure | 30 bars |
The COFA deburring tool is used.
| Tool | COFA4M/4.0/Z1-OM |
| Blade | GH-CM-0914-T nrs |
| Cutting speed | S = 1,200 rpm / v = 15 m/min |
| Working feed | f = 0.2 mm/rev (F = 240 mm/min) |
The deburring process is reliable, so the manual reworking is no longer necessary. The cycle time could be optimised, resulting in a minimum 20% improvement. Long-tenured employees with extensive expertise are as much excited about the result as the production manager, who can now rely on a process-safe solution.