Flat Lapping

Lapping is a precision surface finishing process that improves upon previously ground, machined or fine turned parts. Lapping is a stress free process without heat transfer to the parts. The lapping process produces a dull grey finish, commonly referred to as a lapping matte.

Lapping can be used to:

  • Produce a desired surface finish
  • Improve sealing faces
  • Produce flat stress free surfaces
  • Produce consistent batch sizes

Our experienced operators work a comprehensive range of single and double sided machines allowing us to achieve:

  • One-off size tolerances of 1µm
  • Batch size tolerances of 5µm
  • Part flatness of 1 Helium Light Band(0.29µm)
  • Parallelism of 2µm

We also have the capability to lap stepped and recessed faces. All tooling for such jobs can be designed and made in-house.

This enables us to process a variety of materials including but not limited to:



  • Stainless and Hardened Steel
  • Aluminium
  • Bakelite
  • Ferrous Metals
  • Non Ferrous Metals
  • Silicon
  • Ceramics
  • Glass
  • Rubber Composites
  • Gold
  • Tungsten
  • Titanium
  • Graphite composites
  • Hard Plastics
  • Plastic composites
  • Most materials can be lapped


At N L Roper & Sons Ltd we work with a variety of industries and sectors. If you’re unsure whether your material or part can be processed please feel free to contact our experienced team who will be more than happy to assist you. We offer our customers a complete package on parts that require flatness, parallelism and surface finishes to micron tolerances.