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Superior Black Granite Surface Plates

Superior Black Granite Surface Plates minimize thermal expansion and have low water absorption rates to minimize rusting of precision gages. These plates have very little glare resulting to reduce eyestrain. They are available as Laboratory Grade AA, Inspection Grade A and Toolroom Grade B.

Products
Features



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Products

    Grade AA Laboratory

    No Ledge

    Two Ledge

    Surface Size

    Thickness

    Flatness Unilateral Tolerance

    Weight

    EDP

    EDP

    Inch

    mm

    Inch

    mm

    Inch

    mm

    Lb

    kg

    12 x 12

    300 x 300

    4

    100

    .000050

    0.0012

    61

    28

    85006

    85007

    12 x 18

    300 x 450

    92

    42

    85010

    85011

    18 x 24

    450 x 600

    .000075

    0.0019

    183

    83

    85028

    85029

    24 x 24

    600 x 600

    244

    111

    85036

    85037

    24 x 36

    600 x 900

    6

    150

    .000100

    0.0025

    549

    249

    85055

    85056

    30 x 48

    750 x 1200

    8

    200

    .000168

    0.0043

    1220

    553

    85082

    85083

    36 x 36

    900 x 900

    6

    150

    .000150

    0.0038

    824

    374

    85090

    85091

    36 x 48

    900 x 1200

    8

    200

    .000200

    0.0050

    1464

    664

    85110

    85111

    36 x 60

    900 x 1500

    10

    250

    .000250

    0.0063

    2288

    1038

    85118

    85119

    36 x 72

    900 x 1800

    12

    300

    .000300

    0.0076

    3294

    1494

    85128

    85129

    48 x 48

    1200 x 1200

    8

    200

    .000200

    0.0051

    1952

    885

    85136

    85137

    48 x 72

    1200 x 1800

    10

    250

    .000350

    0.0088

    3660

    1660

    85155

    85156

    48 x 96

    1200 x 2400

    12

    300

    .000500

    0.0127

    5856

    2656

    85173

    85174

    Grade A Inspection

    No Ledge

    Two Ledge

    Surface Size

    Thickness

    Flatness Unilateral Tolerance

    Weight

    EDP

    EDP

    Inch

    mm

    Inch

    mm

    Inch

    mm

    Lb

    kg

    12 x 12

    300 x 300

    4

    100

    .000100

    0.0025

    61

    28

    85008

    85009

    12 x 18

    300 x 450

    92

    42

    85013

    85014

    18 x 24

    450 x 600

    .000150

    0.0038

    183

    83

    85031

    85032

    24 x 24

    600 x 600

    844

    111

    85038

    85039

    24 x 36

    600 x 900

    6

    150

    .000200

    0.0050

    549

    249

    85058

    85059

    30 x 48

    750 x 1200

    .000400

    0.0102

    915

    415

    85085

    85086

    36 x 36

    900 x 900

    .000300

    0.0076

    824

    374

    85092

    95091

    36 x 48

    900 x 1200

    .000400

    0.0102

    1098

    498

    85113

    85114

    36 x 60

    900 x 1500

    8

    200

    .000500

    0.0127

    1830

    830

    85120

    85121

    36 x 72

    900 x 1800

    10

    250

    .000600

    0.0152

    2745

    1245

    85131

    85132

    48 x 48

    1200 x 1200

    6

    150

    .000500

    0.0130

    1464

    664

    85138

    85139

    48 x 72

    1200 x 1800

    8

    200

    .000700

    0.0177

    2928

    1328

    85158

    85159

    48 x 96

    1200 x 2400

    10

    250

    .001000

    0.0254

    4880

    2214

    85176

    85177

    Grade B Toolroom

    No Ledge

    Two Ledge

    Surface Size

    Thickness

    Flatness Unilateral Tolerance

    Weight

    EDP

    EDP

    Inch

    mm

    Inch

    mm

    Inch

    mm

    Lb

    kg

    12 x 12

    300 x 300

    3

    75

    .000200

    0.0050

    46

    21

    85012

    85015

    12 x 18

    300 x 450

    69

    31

    85016

    85017

    18 x 24

    450 x 600

    .000300

    0.0076

    136

    62

    85034

    85035

    24 x 24

    600 x 600

    4

    100

    .000300

    0.0076

    244

    111

    85040

    85041

    24 x 36

    600 x 900

    .000400

    0.0102

    366

    166

    85061

    85062

    30 x 48

    750 x 1200

    6

    150

    .000700

    0.0180

    915

    415

    85088

    85089

    36 x 36

    900 x 900

    .000600

    0.0152

    824

    374

    85094

    85095

    36 x 48

    900 x 1200

    .000800

    0.0203

    1098

    498

    85116

    85117

    36 x 60

    900 x 1500

    .001000

    0.0254

    1373

    623

    85122

    85123

    36 x 72

    900 x 1800

    8

    200

    .001200

    0.0304

    2196

    996

    85134

    85135

    48 x 48

    1200 x 1200

    6

    150

    .000900

    0.0229

    1464

    664

    85140

    85141

    48 x 72

    1200 x 1800

    8

    200

    .001400

    0.0355

    2196

    996

    85161

    85162

    48 x 96

    1200 x 2400

    .002000

    0.0508

    3904

    1771

    85179

    85180

Features

  • Our superior black granite has low water absorption rates, thus minimizing the possibility of your precision gages rusting while setting on the plates.
  • This black granite creates little glare resulting in less eyestrain for individuals using the plates.
  • We have chosen our superior black granite with the specific intent of keeping thermal expansion to a minimum.

  • Tru-Stone 1,816.24 kb