Optical polishing machine
1219 mm | MODEL 48
Lapmaster International
The air bearing line of optical polishers, available with 36" and 48" diameter pitch laps, are designed so that the pitch lap and support plate ride on a very thin cushion of compressed air. These machines are driven from an electric motor via a lay shaft, and power is transferred to the lap using a multi-vee drive belt around the circumference of the support plate. This unique design virtually eliminates vibration at the polishing surface, and dramatically improves component flatness and finish results.
The conventional belt-driven line of optical pitch polishers, available with pitch laps from 60" up to 168" in diameter, are built on heavy-duty fabricated steel and cast iron machine bases. The design is intended to avoid the limiting problems that affect the production of very flat optics, especially vibration and thermal expansion.
The support plate is designed to produce an extremely stable, flat surface. It is made from solid granite, and is usually one-sixth as thick as it is wide to limit deflection under load. Granite is commonly used in flat pitch polishing applications for its slow rate of dimensional change in response to a change in temperature, and eliminates the need for water-cooling typically required on cast iron plate machines.
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