Lapping Machines

Kemet Flat Lapping and Polishing Systems offer the most efficient and reliable method of producing precision flat polished surfaces. Our flat lapping and polishing machines are at the forefront of today’s advanced lapping technology, especially when used with Kemet Diamond products. Kemet lapping machine are available in fixed and variable speed either open face or pneumatic lift and are built strictly to the latest EEC standards.

Flat Lapping and Polishing Machines are available in a range of sizes from 200mm diameter to 3 metres diameter. As a general guide, the smaller bench mounted Machines are for lapping smaller components and light duty applications, whereas the larger Machines are more suited to lapping the larger components, with those in the middle range being commonly used for production lapping where large numbers of pieces are involved.

Flat Lapping Machines are usually used in conjunction with conditioning or control rings. These rings run on the surface of the Lapping or Polishing Plate which contain and give drive to the pieces being lapped. By having chamfers on their outer edges, the rings help to impregnate the Lapping Plate with the diamond abrasive. The rings can also be used to help control the lapping plate flatness. The standard number of conditioning rings used is three but four rings are common on some larger Machines. For special applications, however, special ring sizes can be used.

Lapping Machine Capacity Calculator

Components per conditioning ring based on typical loading of approximately 60% ring surface area. The data is for using standard loading procedures. It is often possible to extend the capacity of a machine utilising special workholding arrangements and fixtures.

Diameter / longest length of part (mm)

Machine Model


Components per conditioning ring

Model 15 20 24 36 48 56 72 84 120
Lapping Plate outside Diameter mm 381 508 610 914 1218 1422 1828 2132 3048
in 15 20 24 36 48 56 72 84 120
Lapping Plate Speed 70rpm 70rpm 58rpm 58rpm 48rpm 48rpm 30rpm 20rpm 4-24rpm
No. of Conditioning Rings 3 3 3 or 4 3 or 4 3 or 4 3 or 4 4 4 4
Conditioning Ring inside Diameter mm 140 191 248
692 813 1016
in 5.5 7.5 9.75
27.25 32 40
Maximum load per Conditioning ring 39Kg 53Kg

3 ring 250Kg 4 ring 200Kg

3 ring 350Kg 4 ring 300Kg 3 ring 400Kg 4 ring 350Kg 3 ring 375Kg 4 ring 325Kg 2000Kg 2250Kg
Height of Open Face Machine mm 670 700 940 940 991 991 914 914 1750
in 26.5 27.6 36 37 39 39 36 36 69
Height of Pneumatic Lift Machine mm N/A 965 1630 2000 2350 2768 2820 2820 3000
in N/A 38 64.2 78.75 92.5 109 111 111 118
Working Height mm 310 385 940 940 1000 1000 912 912 1000
in 12.2 15.2 37 37 39.4 39.4 36 36 39
Width of Machine mm 760 883 1220 1422 1600 2057 2120 2401
in 30 34.75 48 56 63 81 83.5 102.4
Depth of Machine mm 620 780 1350 1620 2000 2184 2667 2970 5000
in 24 30.7 53.2 63.7 78.7 86 105 117 197
Standard Electrical Supply 220v-1Ph-50Hz or 380v or 415v 3Ph-50Hz 220v-1Ph-50Hz or 380v or 415v 3Ph-50Hz 220v or 380v or 415v 3Ph-50Hz 220v or 380v or 415v 3Ph-50Hz 220v or 380v or 415v 3Ph-50Hz 220v or 380v or 415v 3Ph-50Hz 220v or 380v or 415v 3Ph-50Hz 220v or 380v or 415v 3Ph-50Hz 220v or 380v or 415v 3Ph-50Hz
Main Drive Motor 0.37kW 0.75kW 1.5kW 4.1kW 7.5kW 11kW 15kW 22kW 22kW
Abrasive pump motor 0.18kW 0.18kW 0.18kW 0.18kW 0.18kW 0.18kW 0.18kW 0.18kW Up to 1kW
Net Weight Open Face 116kg 245kg 555kg 1000kg 2845kg 3700kg 5359kg 8400kg 29,000kg
Gross Weight Open Face 156kg 343kg 730kg 1220kg 3800kg 4000kg 6650kg 9979kg 34,000kg
Net Weight Pneumatic N/A 240kg 700kg 1530kg 3145kg 5273kg 7930kg 10,439kg 32,000kg
Gross Weight Pneumatic N/A 385kg 997kg 1880kg 3570kg 5573kg 9876kg 11,923kg 37,000kg

Note: Metric / Imperial conversions are approximate. All dimensions are for machines fitted with Kemet Electronic spray systems. In the interests of development, we reserve the right to change the specifications without notice.

Which Machine for your Process?

Kemet Range

Diamond and conventional lapping processes on Kemet composite or cast iron lap plates. Wide range of surface finishes and stock removal rates on most materials. Sub-micron flatness.

KemCol Range

CMP (Chemical Mechanical Polishing) and Cerium Oxide superfinishing. Mirror polishing of materials that are difficult to polish using diamond or conventional abrasives.

DiaCol range

Combined Kemet / KemCol machines able to utilise any lapping and polishing processes on a single machine.

lapping sample testing

Samples are evaluated free-of-charge & reports are issued covering all aspects of the process & the likely consumable costs involved.

free technical support

We provide a complete technical support programme as part of our package. Our team of technical experts are always on hand to offer advice and assistance.

kemet superior service

With over 80 years of expertise, our experienced in-house technical support team can help you with your processes.

Custom Built Lapping Machines

A variety of custom built Precision Diamond Flat Lapping and Polishing machines are available to meet your needs. Contact the sales desk for more information on 01622 755 287.

Benefits of Kemet's Advanced Lapping Technology

Kemet offers a comprehensive range of standard lapping and polishing systems for use across all industrial sectors. Special purpose machines can also be developed for specific applications.

  • Significant reduction in lapping costs
  • Cleaner environment conditions
  • Reduced inspection requirements
  • One operation surface finish
  • Semi skilled operation
  • Faster material removal
  • Faster polishing process
  • Pre set parameters
  • Reduced rejections
  • Optimum geometry and surface finish
  • Easier product cleaning
  • Better utilisation of machine time

Other Lapping Machine Models and Sizes

kemet ISO 9001

BSI number Q05919

Over 85 years of service to industry

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