Improving sealing quality and tribological properties
Superfinishing generates uniform surface characeteristics very consistently. The resulting surface structure has a remarkably high material ratio and, as a result, achieves minimal changes in dimensional tolerances throughout the entire lifetime. The cross-hatch surface pattern generated during superfinishing demonstrates that the ideal spherical shape has been achieved and, with spherical plain bearings, also facilitates optimum lubrication.
Improvement in workpiece geometry
In Superfinishing, the contact between the tool and the workpiece is always defined by an area rather than by a line or point as in grinding or turning. This effectively reduces out-of-roundness and waviness while shapes and profiles are improved considerably.
Optimization of the workpiece outer perimeter characteristics
In grinding and precision turning, structural changes of the material can be triggered by high temperatures and cutting forces. The resulting soft skin has a negative effect on function and wear. Superfinishing removes that surface layer completely so that the sound, indelible material will become the functional surface. At the same time, a residual compressive stress is generated in the new outer layer, which effectively prevents pitting and crack propagation.
Highly economical
The implementation of superfinishing can make expensive hard machining processes like precision turning, fine grinding or lapping obsolete. Supfina technologies also enable fine turned and hard turned surfaces to be superfinished without any grinding.
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