In precision manufacturing, achieving extremely flat and smooth surfaces is critical for many applications. Flat lapping is a process used to create these surfaces, but you may have also heard it referred to by other names. This article will explain flat lapping, explore its various names, and clarify the difference between flat lapping and a specific type of lapping called hyprolapping.
What is Flat Lapping?
Flat lapping is a precision surface finishing process that uses a lapping plate (usually made of cast iron or other suitable material) and a lapping compound (an abrasive slurry) to remove material from a workpiece. The workpiece is placed in contact with the rotating lapping plate, and the abrasive slurry is introduced between the plate and the part. The combination of the abrasive particles and the relative motion between the plate and the workpiece results in a controlled material removal, producing a flat, smooth surface.
Other Names for Flat Lapping
The terms used for flat lapping can sometimes be confusing because different industries or companies may use different terminology. Here are some of the terms that are often used interchangeably with flat lapping:
- Lapping: This is the most general term and often implies flat lapping unless otherwise specified.
- Precision Lapping: This emphasizes the high degree of accuracy and surface finish that can be achieved.
- Surface Lapping: This highlights that the process is specifically for finishing surfaces.
- Flat Finishing: This is a more descriptive term, focusing on the flatness achieved.
Flat Lapping vs. Hyprolapping
Hyprolapping is a specialized type of flat lapping. Hyprolapping is distinguished by its ability to achieve even tighter tolerances and superior surface finishes utilizing fine grit wheels spinning in orbital motion.
Here’s a table summarizing the key differences:
| Feature | Flat Lapping | Hyprolapping |
| Tolerances | Typically down to .0006 in. | Typically down to .0002 in. or even tighter |
| Surface Finish | Smooth surface finish | Maximized surface smoothness, superior finish |
| Applications | General precision surface finishing applications | Critical tolerance applications requiring ultimate smoothness |
Alternative Surface Grinding (ASG) specializes in precision surface finishing services, including hyprolapping. ASG offers expertise in achieving tight tolerances and the absolute best possible flatness and surface finish.
Both flat lapping and hyprolapping are ideal for components requiring:
- Sealing surfaces
- Precise mating surfaces
- Bearing surfaces
Contact Alternative Surface Grinding when your parts call for tighter tolerances and superior surface finishes for the most demanding applications.