Kemet Lapping Plates

Manufactured from a homogeneous mixture of synthetic resins, metal particles and key bonding/hardening. The plates are designed for Kemet’s advanced lapping technology, perfectly compatible with Kemet Liquid Diamond.

Benefits of using Kemet Lapping Plates

  • Holds diamond particles firmly, ensuring both efficient stock removal and repeatable component surface finish.
  • Ductile qualities cushion the diamond particles, preventing damage to the workpiece.
  • Produced in varying hardness values so that even the softest material can be safely lapped with diamond particles without the fear of impregnation.
  • Easy control for optimum flatness.
  • Lapping/polishing plates available to fit all makes of lapping machines with plate diameters up to 3000mm.
  • Dissipates heat and prevents laminar flow of lapped surfaces.
  • Supplied with a cast iron backing plate for maximum stability.
  • Recommended when high precision flatness and surface finish are required.

Iron Lapping Plates

The most commonly used plate. For general purpose stock removal and lapping operations.

Copper Lapping Plates

Used to lap softer materials where fine lapping and polishing are the primary requirements.

Copper SP2 Lapping Plates

Can be used for lapping or polishing hard and medium hardness materials.

PR3 Lapping Plates

Used to generate highly reflective surface finish. Ideal for pre-pad polishing for minimum roll off.

XL Lapping Plates

Replacement for Lead/Tin plate, used for mirror polishing.

XP Lapping Plates

Gives improved flat polished surfaces on many materials. Flat mirror-like surfaces can be produced on many hard materials.

Tin Lapping Plates

One of the softest Kemet Plates used for mirror polishing with fine grades of Kemet Liquid Diamond.

Ceramic Lapping Plates

One of the hardest Kemet Lapping Plates. Used for special applications often where a cleaner lapping process is required.

FP Plates

A replacement for the Kemet Lead/Tin Plate, the Kemet FP Plate gives good stock removal, whilst producing high quality surface finish and flatness with Kemet Diamond Slurry.

Contact Kemet

lapping plate grading


Lapping Plate Grooving

Lapping plates can be supplied grooved to suit specific applications. A cross hatched pattern is common on Cast Iron Hand Lapping plates and Dual Face Machine plates and gives increased stock removal rates due to the additional cutting edges generated on each groove. A Spiral groove pattern is used primarily when polishing parts that need to have a good surface finish and flatness, allowing contamination to be carried away from the cutting surface and making it easier to keep the lapping plate contact surface flat. The edges of the groove maintain good stock removal even through the diamond particle size may be small.

square grooved lapping plates
spiral grooved lapping plates
concentric grooved lapping plates


Kemet Annular Grooved Plates

These plates are designed for precision shoulder lapping of a wide range of parts, such as fuel pump gear faces and pressure relief valve caps. These are bespoke manufactured and the groove width and depth of plates need to be specified when ordering.

Kemet Annular Grooved Plates

Lapping Plate Lift Off Disc System

Kemet Lapping Plates are available as Lift-Off Discs. Discs are supplied mounted on an aluminium backing plate, which locates onto an aluminium drive plate by means of three pegs. Lift-Off Discs can be easily changed and are recommended for light duty work where general flatness and precision finish are required.

lift off plate systems


Cast Iron Hand Lapping Plates

Hand Lapping Plates are suitable for laboratory, toolroom or maintenance workshops and can be used for lapping parts to extreme flatness in low volumes.

These plates are made from high quality, low porosity grey cast iron (Grade 300 to BS1452) and are usually serrated with a square cross-hatched pattern. Solid (unserrated) hand lapping plates are available for use with very small workpieces.

These are used with an abrasive grit, applied in paste form to give a uniform dull matt finish on a wide variety of metallic and non-metallic materials. Three standard sizes of plate are available (Other sizes available upon request):

Hand Lap Plate Disc Diameter
2” 3” 4” 6” 8” 10” 12” 18” 24”
c/hatch Grooves   - - 361021 360835 360830 360198 360707 361029
Solid 361733 361797 361736 361738 361739 361997 360264 360762 361193

We offer a variety of sizes from 3” to 24” diameter (Other sizes available upon request).

cast iron hand lapping plates

Soft Metal Alloy Hand Polishing Plates

Alloy polishing plates are for use with diamond abrasives, either in paste or spray form, to produce polished surfaces on components.

The plate is made of a lead-based white metal conforming to BS3332/F. This is a lead / tin / antimony alloy with traces of other metals and is an ideal soft metal matrix for diamond grains.

A small charging block is provided to load the soft metal surface with diamond abrasive. This is an essential step in preparing the lap plate prior to polishing. Two sizes of plate are available:

Diameter Finish Code
6” (150mm) Solid 361019
12” (300mm) Solid 361046
alloy polishing plate

Cast Iron Lapping Plates

We offer a wide range of cast iron lapping plates to suit most lapping machines. Available in 15", 24", 36" serratted or solid. Other sizes available on request.

cast iron lapping plates

Portable Hand Lapping Kits

Hand lapping uses the same principles as machine lapping with respect to abrasive grade / plate selection / plate flatness.

hand lapping kits

Kemet awarding bodies

Over 40 years of service to industry

Your subscription could not be saved. Please try again.

Signup to receive our special offers



Cookies & Privacy Policy
© 2024 Kemet Far East Pte Ltd