Granite Surface Plates & Tables

Granite surface plates and tables are a must for accurate measurement and provide a flat and stable environment for inspection. They are free from temperature distortion and offer an exceptionally sturdy measuring environment due to their thickness and weight.

Measuring on uneven surfaces can give incorrect or inconsistent inspection results, using a granite surface plate can help eliminate this problem.

Manufactured to the same quality standards made synonymous by Crown since 1904, all Eley granite tables and surface plates conform to BS 817 (2008) and are available in three grades, Grade 0, Grade 1 and Grade 2.

Our granite surface tables are supplied with a high-quality box section support stand for easy levelling with five adjustable points of support; 3 being primary points and the others outriggers for stability.

All granite plates and tables are supported by UKAS Certification.

Granite Surface Plates & Tables

Why Choose Granite for Machine Bases and Metrology Components

Granite, a type of igneous rock was formed in the Earth millions of years ago. The composition of igneous rock contained many minerals such as quartz that is extremely hard and wear resistant. In addition to hardness and wear resistance granite has approximately half the coefficient of expansion as iron. It is non-magnetic and will not rust. Its volumetric weight is approximately one third that of iron.

Granite is far more cost-effective, cut surfaces can be exceptionally flat. Not only can it be hand lapped to achieve extremes of accuracy but reconditioning can be performed without moving the plate or table off-site. It is entirely a hand lapping operation and generally costs much less than re-conditioning a cast iron alternative.

These qualities make granite the ideal material to create custom-size and custom-design machine bases and metrology components.

Advantages of Granite Surface Plates

If scratched it will not burr and therefore the plane of the surface is unaffected and will retain its accuracy longer than conventional surfaces.

The surface is a continuous plane, not a series of bearing points, thus giving 2-3 times the life of other materials.
Will not rust or be affected by chemical action. Provides a smooth non-wringing surface over which instruments will easily move.

Has a low coefficient of expansion and is, therefore, less affected by temperature change. This coupled with the natural rigidity of the stone results in unequally.

Granite components are easy to clean and can be resurfaced to original accuracy at low cost and quick turnaround.

Grade 0 - Granite Surface Plates & Tables

Eley Metrology's Granite Surface Plates and Tables are in accordance with BS 817 (2008) and are graded at three levels; Grade 0 plates and tables are typically used for laboratory environments where master artefacts are required.

0300 x 200 x 503.53
0300 x 300 x 5043
0450 x 300 x 7543
0450 x 450 x 754.53
0600 x 450 x 754.53
0600 x 600 x 7553
0900 x 600 x 1005.53
01000 x 1000 x 1505.53
01200 x 900 x 1506.53
01500 x 1000 x 2007.53
01800 x 900 x 20083
02000 x 1200 x 20083
02400 x 1200 x 2009.53

Grade 1 - Granite Surface Plates & Tables

Eley Metrology's Grade 1 plates and tables are most often used for inspection purposes.

1300 x 200 x 5076
1300 x 300 x 5086
1450 x 300 x 7586
1450 x 450 x 7596
1600 x 450 x 7596
1600 x 600 x 75106
1900 x 600 x 100116
11000 x 1000 x 150116
11200 x 900 x 150136
11500 x 1000 x 200156
11800 x 900 x 200166
12000 x 1200 x 200166
12400 x 1200 x 200196

Grade 2 - Granite Surface Plates & Tables

Eley Metrology's Grade 2 surface plates and tables are commonly used in workshop environments where such a high flatness tolerance is not required.

2300 x 200 x 501412
2300 x 300 x 501612
2450 x 300 x 751612
2450 x 450 x 751812
2600 x 450 x 751812
2600 x 600 x 752012
2900 x 600 x 1002212
21000 x 1000 x 1502212
21200 x 900 x 1502612
21500 x 1000 x 2003012
21800 x 900 x 2003212
22000 x 1200 x 2003212
22400 x 1200 x 2003812

All Eley Metrology's larger plates (900 x 600 x 100 and up) are available with a high-quality steel support stand as standard with 3 adjustable points to ensure flatness on any surface, these support stands can also be applied to 600 and above size of plate when you require a specific working height.

If any non-standard sizes are required, Eley can produce one-off or 'special' sized granite surface plates and tables to your specifications.

Find Out More

If you’d like more details about our range of Metrology Equipment, then our team are available to help.

Call Us: +44 (0) 1332 367475


Send your enquiry via our contact form below;

How Can We Help

This form collects your name, email address, company name and phone number. The information provided is stored on our systems. Please review our Privacy Policy for information on how we manage your submitted data.