Lapmaster offers Polishing Pads in a range of sizes and materials to fit almost any application. The pads come with plain or adhesive backing for mounting to machine plates and can be used for polishing a wide variety of materials including metals, glass, semiconductor materials, and more.
A polishing pad is a thin disc of fabric or synthetic adhered to the flat surface of a polishing plate. It is used to produce the highest quality scratch free reflective surface finishes using diamond abrasive or chemical polishing agents. Polishing with a pad is considered a “soft polishing” technique because pad materials always have some amount of compliance. The thickness and hardness of the pad determines the compliance. Thicker, softer pads allow the components to sink down into the pad, which produces a radius at the contact edge circumference. The radius or “edge dubbing” prevents the component from being polished flat from edge to edge.
Polishing Pad Recommendations
Selecting the most appropriate polishing pad for an application requires experience and knowledge. This is why Lapmaster operates an applications laboratory to develop processes for machining customer's components. Prior to recommending a specific polishing pad it is suggested that Lapmaster be consulted with the application data so that our experience can be used to select the most appropriate pad.
Lapmaster offers a variety of the more common soft polishing pads in diameters up to 36 inches (914.4mm). Larger diameters generally cannot be supplied in one piece because the manufacturers do not produce the pad materials in a width any wider than 36 inches. Larger diameter pads are usually made in two or three pieces, but this poses difficulty when installing on a polishing plate.
Listed below are the standard polishing pads offered by Lapmaster and some of the more common applications for which they are utilized. By no means is this intended to be an all- inclusive, definitive recommendation chart.Lapmaster Polishing Pads are offered in a wide range of sizes and are made from different types of materials to accommodate almost any polishing application, including Metallographic, petrographic, fiber optics, and many more.
- Pellon - A low cost, rigid, relatively durable material used for general polishing of metals where surface quality is not extremely precise.
- Lapmaster Supreme - A long life polyurethane polishing pad. Excellent for final polishing with alumina or colloidal silica. Available with PSA backing only.
- Kemet ASF - A medium cost, woven, synthetic silk fabric laminated to a compressible backing material. This pad is used to produce extremely high quality scratch free mirror surface roughness on metal and ceramic components where edge rounding is not a concern.
- Kemet ASFL - A medium cost, woven, synthetic silk fabric laminated to a firm, thin backing material. This pad is used to produce extremely high quality scratch free mirror surface roughness on metal and ceramic components where edge rounding cannot be tolerated.
- Suba 500 - A medium cost, very firm polyurethane impregnated polyester felt material used for higher stock removal polishing applications requiring high precision surfaces. Common applications include plated memory discs, aluminum, tungsten, silicon, ceramic, plastic and glass.
- Polyurethane - A microcellular, rigid foam material impregnated with cerium oxide abrasive. This very hard pad is specifically used for polishing glass where precision flatness is required.
- Silk - Recommended for rough polishing with diamond. Excellent for friable materials such as coal and petrographic samples. Available with plain backing only.
- NTR - A soft napped final polishing cloth best used with 6-micron diamond and finer. Available with PSA backing only.
- Micro LP - 100% pure wool. Recommended for intermediate and final polishing stages with diamond or alumina. Available with PSA backing only
- ASR - Synthetic silk mounted on a rigid backing. Best results obtained with diamond. Available with PSA backing only
- Nylon - Napless nylon weave provides excellent finish on most materials. Excellent for flatness and edge retention. Available with plain and PSA backing.
- PAN-W - Napless, non-woven textile. Excellent for flatness and edge retention. Available with PSA backing only.
- Velpol - A short nap synthetic velvet. Recommended for final polishing with diamond, alumina or colloidal silica. Available with PSA backing only.
- Cotton - Recommended for rough polishing with diamond compound. Available with plain backing only.
- Final Polishing Cloth - A medium nap rayon cloth. Excellent for final polishing with diamond or alumina. Available with plain and PSA backing
- Selvyt - Medium nap cotton cloth. Excellent for intermediate or final polishing with diamond. Available with plain backing only.
- Billiard - 100% virgin wool fabric with uniform sheared pile for general rough polishing with Aluminum Oxide powders and suspensions for steels and other ferrous based materials. Available with PSA backing only
- Blue Final - Fine, short napped high density synthetic cloth. Excellent for final polishing with diamond and colloidal silica.
- Red Felt - 100% wool. Used on a wide variety of materials. Recommended for intermediate or final polishing with diamond.
- Imperial - Final polish cloth recommended for softer materials. Excellent with colloidal silica and aluminas.
- Heavy Nylon - Hard woven cloth pad used to replace some rough grinding steps when used with polycrystalline diamond.
- Fine Wool - 100% wool cloth. Finer weave for final polishing with diamond.
- Satin - Durable, synthetic silk style cloth used with diamond for intermediate and final polishing
- Brown Final - Durable, short nap synthetic used for final polishing with diamond or alumina.