The term "lapping" is used to describe a number of various surface finishing operations where loose abrasive powders are used as the grinding agent at normally low speeds. It is a process reserved for products that demand very tight tolerances of flatness, parallelism, thickness or finish.
One or more parts are machined at the same time in a batch process. The abrasive is usually mixed with a liquid vehicle, either oil or water based. The pieces being lapped are captured in retaining rings. Workholders also called "carriers" may be used to keep the parts separated to prevent damage to their edges. The parts are dragged across the lap plate surface on to which the abrasive is being fed.
Lapping is an averaging process where the greatest material removal occurs where the high points of the surface of the part contact the flat lap plate. The object is to produce parts with a uniformly smooth and usually flat surface.A surface that has been lapped exhibits a dull, non-reflective and multi-directional appearance. This condition is referred to as “matte” finish. There may be slight reflectivity on materials lapped with very small micron size aluminum oxide abrasive. This is especially true if the material is relatively hard and the surface roughness measurement is perhaps 5 (.127 micron) micro-inch and below.
Very light “micro-scratches” may be viewed on lapped surfaces. Abrasive of larger micron size and harder compound will generate more micro-scratches in addition to deeper scratches. Most micro-scratches produced with small micron aluminum oxide abrasive will be less than .000001” (.025 micron) deep and can’t usually be measured with a profilometer. Micro-scratches should not be confused with deeper scratches produced by particles of contamination or other causes.
The Lapmaster Wolters SPL has been developed to produce a Convex or Concave scratch-free, high quality surface on spherical components. The machine can also match lap a range of mating sphere components such as, Hydraulic timing valves. This system is effective on most materials including ceramic, graphite, ferrous metals, alloyed metals and stellite coatings
The Lapmaster Wolters LBVS has been developed to produce very accurate spherical surfaces on a variety of Ball Valves. A scratch free, matt high-quality surfaces is obtained on the Ball Valve and Seat. The machine match laps two Seats to the valve, achieving a perfect mechanical seal for any pressure requirement.
PRECISION SURFACING SOLUTIONS supports manufacturers in a wide variety of industries in which precision grinding, lapping, polishing, deburring and advanced materials processing equipment is commonly used. They all need high-quality, high-precision, stable and well-engineered machines to manufacture high-quality work pieces.Visit Site
Produced in Germany since 2009, MICRON machines are compact and dynamically rigid grinding machines especially designed for Creep Feed and Profile grinding. MICRON is an industry leader in grinding of Hydraulic components like stators, rotors and van pumps.Visit Site
Founded in 1934, KEHREN is a well-established designer and builder of high-precision grinding machine tools and systems under the following categories: vertical grinding centers, vertical grinding centers with portal design, surface grinders with rotary tables and horizontal spindles, and surface grinders with dual rotary tables and vertical spindles.Visit Site
REFORM Grinding Technology GmbH is specialized in the sales, development & production of grinding machines for various applications at its location in Fulda (Germany).Visit Site
The aba company was founded in 1898 under the name "Messwerkzeugfabrik Alig & Baumgärtel Aschaffenburg", hence the initials aba. Today, the aba Grinding Technologies is exclusively focused on the advancement and production of precision surface and profile grinding machines.Visit Site
ELB-Schliff Werkzeugmaschinen GmbH has been producing surface and profile grinding machines for over 60 years. The company was founded by Edmund Lang in the city of Babenhausen which led to the name "ELB-Schliff".Visit Site
Since 1907 Barnes has been considered a world leader in developing innovative honing and bore finishing technology and processes. The earliest Barnes honing machines were the first to make honing a practical and efficient means of finishing automotive cylinder bores in a production environment.Visit Site
Founded in Chicago in 1948 as a manufacture of lapping and polishing machines for the mechanical seal market, Lapmaster has grown to a worldwide solution provider for more than 20 industries like precision optics and advanced materials.Visit Site
Founded in Germany in 1804 by Mr. Peter Wolters, Peter Wolters has been producing lapping, polishing and fine grinding equipment since 1936. Peter Wolters delivered its first machine to the silicon wafer processing market in 1961 and remains an industry leader in wafer polishing as well as general industry fine grinding.Visit Site