Granite Flat-Surface Plates
Corrosion resistant and nonmagnetic, these smooth plates also resist warping and abrasion. The extremely tight flatness tolerances provide an accurate reference plane for layout and inspection work.
Plates with two ledges are used to hold fixtures and instruments with clamps.
Laboratory Grade AA plates are for precision quality control work.
Inspection Grade A plates are for general quality control work.
Toolroom Grade B plates are for checking work throughout a shop.
Also Available: Other plate sizes. Please order 2245A999 and specify grade, length, width, thickness, and with or without ledges.
For technical drawings and 3-D models, click on a part number.
Plates | Plate Covers | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Lg. | Wd. | Ht. | Flatness Tolerance | Color | Specifications Met | Certification | Wt., lbs. | Each | Each | ||
Rectangular | |||||||||||
Laboratory Grade AA | |||||||||||
12" | 8" | 2" | 0.00005" | Black | ASME B89.3.7, Fed. Spec. GGG-P-463C, ISO 10012 | Certificate of Accuracy Traceable to NIST | 28 | 0000000 | 0000000 | 000000 | 00 |
18" | 12" | 4" | 0.00005" | Black | ASME B89.3.7, Fed. Spec. GGG-P-463C, ISO 10012 | Certificate of Accuracy Traceable to NIST | 93 | 0000000 | 000000 | 00000000 | 000000 |
24" | 18" | 4" | 0.000075" | Black | ASME B89.3.7, Fed. Spec. GGG-P-463C, ISO 10012 | Certificate of Accuracy Traceable to NIST | 185 | 0000000 | 000000 | 00000000 | 000000 |
36" | 24" | 6" | 0.0001" | Black | ASME B89.3.7, Fed. Spec. GGG-P-463C, ISO 10012 | Certificate of Accuracy Traceable to NIST | 601 | 0000000 | 00000000 | 00000000 | 000000 |
48" | 36" | 6" | 0.0002" | Black | ASME B89.3.7, Fed. Spec. GGG-P-463C, ISO 10012 | Certificate of Accuracy Traceable to NIST | 1,203 | 0000000 | 00000000 | 00000000 | 000000 |
Inspection Grade A | |||||||||||
12" | 8" | 2" | 0.0001" | Black | ASME B89.3.7, Fed. Spec. GGG-P-463C, ISO 10012 | Certificate of Accuracy Traceable to NIST | 28 | 0000000 | 000000 | 000000 | 00 |
18" | 12" | 4" | 0.0001" | Black | ASME B89.3.7, Fed. Spec. GGG-P-463C, ISO 10012 | Certificate of Accuracy Traceable to NIST | 93 | 0000000 | 000000 | 00000000 | 00000 |
24" | 18" | 4" | 0.00015" | Black | ASME B89.3.7, Fed. Spec. GGG-P-463C, ISO 10012 | Certificate of Accuracy Traceable to NIST | 185 | 0000000 | 000000 | 00000000 | 000000 |
36" | 24" | 6" | 0.0002" | Black | ASME B89.3.7, Fed. Spec. GGG-P-463C, ISO 10012 | Certificate of Accuracy Traceable to NIST | 555 | 0000000 | 00000000 | 00000000 | 000000 |
48" | 36" | 6" | 0.0004" | Black | ASME B89.3.7, Fed. Spec. GGG-P-463C, ISO 10012 | Certificate of Accuracy Traceable to NIST | 1,110 | 0000000 | 00000000 | 00000000 | 000000 |
Toolroom Grade B | |||||||||||
12" | 8" | 2" | 0.0002" | Black | ASME B89.3.7, Fed. Spec. GGG-P-463C, ISO 10012 | Certificate of Accuracy Traceable to NIST | 21 | 0000000 | 000000 | 000000 | 00 |
18" | 12" | 3" | 0.0002" | Black | ASME B89.3.7, Fed. Spec. GGG-P-463C, ISO 10012 | Certificate of Accuracy Traceable to NIST | 70 | 0000000 | 000000 | 00000000 | 00000 |
24" | 18" | 3" | 0.0003" | Black | ASME B89.3.7, Fed. Spec. GGG-P-463C, ISO 10012 | Certificate of Accuracy Traceable to NIST | 139 | 0000000 | 000000 | 00000000 | 000000 |
36" | 24" | 4" | 0.0004" | Black | ASME B89.3.7, Fed. Spec. GGG-P-463C, ISO 10012 | Certificate of Accuracy Traceable to NIST | 370 | 0000000 | 000000 | 00000000 | 000000 |
48" | 36" | 6" | 0.0008" | Black | ASME B89.3.7, Fed. Spec. GGG-P-463C, ISO 10012 | Certificate of Accuracy Traceable to NIST | 1,203 | 0000000 | 00000000 | 00000000 | 000000 |
Rectangular with Two Ledges | |||||||||||
Laboratory Grade AA | |||||||||||
18" | 12" | 4" | 0.00005" | Black | ASME B89.3.7, Fed. Spec. GGG-P-463C, ISO 10012 | Certificate of Accuracy Traceable to NIST | 83 | 0000000 | 000000 | 00000000 | 00000 |
24" | 18" | 4" | 0.000075" | Black | ASME B89.3.7, Fed. Spec. GGG-P-463C, ISO 10012 | Certificate of Accuracy Traceable to NIST | 175 | 0000000 | 000000 | 00000000 | 000000 |
Inspection Grade A | |||||||||||
18" | 12" | 4" | 0.0001" | Black | ASME B89.3.7, Fed. Spec. GGG-P-463C, ISO 10012 | Certificate of Accuracy Traceable to NIST | 83 | 0000000 | 000000 | 00000000 | 00000 |
24" | 18" | 4" | 0.00015" | Black | ASME B89.3.7, Fed. Spec. GGG-P-463C, ISO 10012 | Certificate of Accuracy Traceable to NIST | 175 | 0000000 | 000000 | 00000000 | 000000 |
36" | 24" | 6" | 0.0002" | Black | ASME B89.3.7, Fed. Spec. GGG-P-463C, ISO 10012 | Certificate of Accuracy Traceable to NIST | 530 | 0000000 | 00000000 | 00000000 | 000000 |
48" | 36" | 6" | 0.0004" | Black | ASME B89.3.7, Fed. Spec. GGG-P-463C, ISO 10012 | Certificate of Accuracy Traceable to NIST | 1,063 | 0000000 | 00000000 | 00000000 | 000000 |
Toolroom Grade B | |||||||||||
18" | 12" | 3" | 0.0002" | Black | ASME B89.3.7, Fed. Spec. GGG-P-463C, ISO 10012 | Certificate of Accuracy Traceable to NIST | 66 | 0000000 | 000000 | 00000000 | 00000 |
24" | 18" | 3" | 0.0003" | Black | ASME B89.3.7, Fed. Spec. GGG-P-463C, ISO 10012 | Certificate of Accuracy Traceable to NIST | 130 | 0000000 | 000000 | 00000000 | 000000 |
36" | 24" | 4" | 0.0004" | Black | ASME B89.3.7, Fed. Spec. GGG-P-463C, ISO 10012 | Certificate of Accuracy Traceable to NIST | 357 | 0000000 | 00000000 | 00000000 | 000000 |
Stands for Granite Flat-Surface Plates
These stands have three plate support points to match the support points on most granite plates as defined by Fed. Spec. GGG-P-463c.
For technical drawings and 3-D models, click on a part number.
For Plate | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
Lg. | Wd. | Ht. | Load Capacity, lbs. | Ht. | Material | Color | Caster Type | For Plate Style | Each | |
Mobile | ||||||||||
18" | 12" | 3", 4" | 400 | 36" | Painted Steel | Gray | Two Rigid and Two Swivel with Brakes | 0000000 | 0000000 | |
24" | 18" | 3", 4" | 500 | 36" | Painted Steel | Gray | Two Rigid and Two Swivel with Brakes | 0000000 | 00000000 | |
36" | 24" | 4", 6" | 1,200 | 36" | Painted Steel | Gray | Two Rigid and Two Swivel with Brakes | 0000000 | 00000000 | |
48" | 36" | 6" | 2,400 | 36" | Painted Steel | Gray | Two Rigid and Two Swivel with Brakes | 0000000 | 00000000 | |
Stationary | ||||||||||
18" | 12" | 3", 4" | 400 | 36" | Painted Steel | Gray | __ | 0000000 | 000000 | |
24" | 18" | 3", 4" | 500 | 36" | Painted Steel | Gray | __ | 0000000 | 000000 | |
36" | 24" | 4", 6" | 1,200 | 36" | Painted Steel | Gray | __ | 0000000 | 00000000 | |
48" | 36" | 6" | 2,400 | 36" | Painted Steel | Gray | __ | 0000000 | 00000000 |
Economy Weighted-Base Indicator Holders
Commonly used on workbenches, these stands have a heavy granite base for stability. They hold indicators in place for taking accurate readings.
Holder with fine-adjustment arm gives you more control over positioning.
Base | Upright Post | Arm | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Mounting Lug Hole Dia. | Surface Accuracy | Throat Dp. | Type | Lg. | Wd. | Ht. | Thread Size | Thread Pitch, mm | Material | Dia. | Ht. | Material | Lg. | Flexibility | Features | Each | |
1/4" | ±0.0001" | 2 3/8" | Flat | 6" | 6" | 2" | 3/8"-16 | __ | Granite | 1 1/4" | 8" | Steel | 2 1/8" | Rigid | __ | 00000000 | 0000000 |
1/4" | ±0.0005" | 2 3/8" | Flat | 6" | 6" | 2" | M10 | 1.5 | Granite | 1" | 8" | Steel | 1 7/8" | Rigid | Fine-Adjustment Arm | 00000000 | 000000 |
Base | Upright Post | Arm | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Mounting Stem Dia. | Surface Accuracy | Throat Dp. | Type | Lg. | Wd. | Ht. | Thread Size | Material | Dia. | Ht. | Material | Lg. | Flexibility | Each | |
3/8" | ±0.0001" | 4 25/32" | Flat | 12" | 18" | 4" | 3/8"-16 | Granite | 1 1/4" | 12" | Stainless Steel | 4 3/16" | Rigid | 00000000 | 0000000 |
3/8" | ±0.0001" | 5 5/8" | Flat | 8" | 12" | 2" | 3/8"-16 | Granite | 1 1/4" | 12" | Stainless Steel | 5 3/8" | Rigid | 00000000 | 000000 |
Precision Weighted-Base Indicator Holders with Calibration Certificate
These holders come with a calibration certificate traceable to NIST states that the granite base has passed a test for surface accuracy. The extremely tight flatness tolerances of the granite allow for nearly frictionless workpiece movement and provide an accurate reference plane for inspection work.
Holders with jointed arm have a fine-adjustment knob for precise positioning.
Base | Upright Post | Arm | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Mounting Stem Dia. | Surface Accuracy | Throat Dp. | Lg. | Wd. | Ht. | Thread Size | Material | Dia. | Ht. | Material | Lg. | Flexibility | Features | Each | |
3/8" | ±0.00005" | 1 3/4" | 6" | 6" | 2" | 1/2"-13 | Granite | 1 1/4" | 8" | Steel | 4 1/8" | Rigid | __ | 0000000 | 0000000 |
3/8" | ±0.0001" | 5" | 8" | 12" | 2" | 1/2"-13 | Granite | 1 1/4" | 12" | Steel | 7 5/16" | Jointed | Fine-Adjustment Arm | 0000000 | 000000 |
3/8" | ±0.0001" | 5" | 12" | 18" | 4" | 1/2"-13 | Granite | 1 1/4" | 12" | Steel | 7 5/16" | Jointed | Fine-Adjustment Arm | 0000000 | 00000000 |
Base | Upright Post | Arm | |||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
For Mounting Lug Hole Dia. | Surface Accuracy | Throat Dp. | Lg. | Wd. | Ht. | Thread Size | Material | Dia. | Ht. | Material | Lg. | Flexibility | Features | Each | |
1/4" | ±0.00005" | 1 3/4" | 6" | 6" | 2" | 1/2"-13 | Granite | 1 1/4" | 8" | Steel | 4 1/8" | Rigid | __ | 0000000 | 0000000 |
1/4" | ±0.0001" | 5" | 8" | 12" | 2" | 1/2"-13 | Granite | 1 1/4" | 12" | Steel | 7 5/16" | Jointed | Fine-Adjustment Arm | 0000000 | 000000 |
1/4" | ±0.0001" | 5" | 12" | 18" | 4" | 1/2"-13 | Granite | 1 1/4" | 12" | Steel | 7 5/16" | Jointed | Fine-Adjustment Arm | 0000000 | 00000000 |
Cleaners for Granite Flat-Surface Plates
Remove particles from granite flat-surface plates without leaving a residue.