After
millions of years of natural stress relieving, Granite, having high rigidity and
non-magnetic properties, being totally corrosion and stress free, becomes
the perfect most reliable product for inspection purposes where an accurate
datum is of top priority.
All
Granite Surface Plates and Tables are manufactured to British Standard Specifications with DIN, Federal and JIS products available on
request. Each Surface Plate and Table is
calibrated by one of our highly experienced engineers and is supplied with a
nationally traceable Certificate of
Calibration, free of charge.
All tables are mounted on a strong, steel frame
easily adjusted. 'T' slots and threaded inserts available at extra cost.
Supply of custom machined granite is also available including slots, dovetails
and holes.
Properties of Granite
|
|
Density
|
2600kg/m
|
| Modulus
of Elasticity
|
57GN/m
|
| Coefficient
of Expansion
|
8 x
0.000001
|
| Vickers
Hardness
|
1.00N/m
|
| Compression
Strength
|
172MN/m |
|
|
Each
Surface Plate and Table is calibrated by one of our highly
experienced engineers and is supplied with a nationally
traceable Certificate of Calibration, free of charge. All tables
are mounted on a strong, steel frame easily adjusted. 'T' slots and threaded inserts available at extra cost. |
 |
|
PLATE
DIMENSIONS
|
GRADE
0
|
GRADE
1
|
GRADE
2
|
GRADE
3
|
|
300
x 300
|
0.0040
|
0.0080
|
0.0160
|
0.0320
|
|
450
x 300
|
0.0040
|
0.0080
|
0.0160
|
0.0320
|
|
450
x 450
|
0.0045
|
0.0090
|
0.0180
|
0.0360
|
|
600
x 450
|
0.0045
|
0.0090
|
0.0180
|
0.0360
|
|
600
x 600
|
0.0050
|
0.0100
|
0.0200
|
0.0400
|
|
900
x 600
|
0.0055
|
0.0100
|
0.0220
|
0.0440
|
|
|
TABLE
DIMENSIONS
|
GRADE
0
|
GRADE
1
|
GRADE
2
|
GRADE
3
|
|
900
x 600
|
0.0055
|
0.0110
|
0.0220
|
0.0440
|
|
1000
x 1000
|
0.0065
|
0.0130
|
0.0260
|
0.0520
|
|
1200
x 600
|
0.0060
|
0.0120
|
0.0240
|
0.0480
|
|
1200
x 900
|
0.0065
|
0.0130
|
0.0260
|
0.0520
|
|
1200
x 1200
|
0.0070
|
0.0140
|
0.0260
|
0.0560
|
|
1500
x 1000
|
0.0075
|
0.0150
|
0.0280
|
0.0600
|
|
2000
x 1000
|
0.0085
|
0.0170
|
0.0300
|
0.0680
|
|
2000
x 1200
|
0.0085
|
0.0170
|
0.0340
|
0.0680
|
|
2400
x 1200
|
0.0095
|
0.0190
|
0.0380
|
0.0760
|
|
|
 |
|
DIMENSIONS
|
SQUARENESS
|
PARALLELISM
|
|
150
x 150 x 150
|
0.010
|
0.013
|
|
200
x 200 x 200
|
0.012
|
0.015
|
|
250
x 250 x 250
|
0.015
|
0.017
|
|
300
x 300 x 300
|
0.015
|
0.017
|
|
|
DIMENSIONS
|
SQUARENESS
|
PARALLELISM
|
|
150
x 150 x 150
|
0.010
|
0.013
|
|
200
x 200 x 200
|
0.012
|
0.015
|
|
250
x 250 x 250
|
0.015
|
0.017
|
|
300
x 300 x 300
|
0.015
|
0.017
|
|
|
 |
|
DIMENSIONS
|
SQUARENESS
|
PARALLELISM
|
|
150
x 150 x 50
|
0.010
|
0.013
|
|
300
x 300 x 75
|
0.012
|
0.015
|
|
450
x 450 x 75
|
0.015
|
0.017
|
|
600 x 600 x 100
|
0.015
|
0.017
|
|
1000
x 150 x 150
|
0.015
|
0.018
|
|
|
DIMENSIONS
|
STRAIGHTNESS &
PARALLELISM
|
|
600
x 100 x 40
|
0.005
|
|
1000
x 125 x 40
|
0.008
|
|
1200
x 150 x 50
|
0.008
|
|
1500
x 150 x 50
|
0.012
|
|
2000 x 150 x 50
|
0.015
|
|
|
 |
|
DIMENSIONS
|
SQUARENESS
|
MATCHING
|
|
150
x 50 x 12
|
0.010
|
0.013
|
|
200
x 50 x 15
|
0.012
|
0.015
|
|
250
x 50 x 25
|
0.015
|
0.017
|
|
300
x 50 x 30
|
0.015
|
0.017
|
|