| Lapping is a two motion (rotation and reciprocation), low
pressure, abrasive machining process which utilizes a lapping tool along
with an abrasive in a compound form. The lapping process results
in stock removal ranging from a few thousandths of an inch to several
millionths of an inch. Any desired surface finish can be achieved.
The following imperfections in cylindrical geometry can be corrected
with helical laps:
- Correction of tapered I.D. or O.D.
- Correction of out of round conditions
- Correction of bell-mouthed bores
- Correction of barrel-shaped bores
- Improvement in straightness of I.D. or O.D.
In addition to geometrical improvements, lapping can also provide:
- Improvement and refinement of surface finish quality
- Close tolerance accuracy at minimal cost compared to other
finishing methods
Cylindrical geometries that have been achieved with helical laps:
- .000005" (5 millionths) roundness
- .000010" (10 millionths) straightness
- Surface finish better than one microinch
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