Buy Precision Granite Comparator Stand 12 x 18 x 2 inches with Standard or Special 10 inch Post & Clamp (USA Made).
The 12 x 18 x 2 Precision Granite Comparator Stand is an essential tool for precision measurement, part inspection, quality control, and calibration applications. Manufactured in the USA from premium black precision granite, this comparator stand provides an exceptionally stable, durable, and accurate platform for demanding machining, metrology, and inspection environments. Designed for use with dial indicators and comparator systems, this granite stand delivers the rigidity and repeatability required for reliable measurements in CNC shops, tool rooms, quality control, inspection laboratories, and manufacturing facilities.
USA-Made Precision & Traceability
Our granite comparator stands are proudly Made in the USA and manufactured to meet or exceed industry-recognized standards for accuracy and quality.
Options - Choose Indicator Post Type - 10in Tall - Choose the configuration that best fits your inspection setup:
- Standard Clamp - For lug AGD back indicators, post with fine adjustment
- Special Clamp - For stem drop indicators, post with fine adjustment.
(Not available for 8 X 12 or smaller)
Options - Post Mount Location (Choose)
What's Included
- (1) Precision Granite Comparator Stand - 12in x 18in x 2in
- (1) 10 inch post with your selected clamp option
- Fine-adjustment mechanism
- Calibration Certificate
| Standard Post - 12 x 18 x 2 Precision Granite Comparator Stand |
| Standard 10in. Post & Clamp - for lug back indicators |
| Grade |
Our Part# |
Overall Accuracy |
Wt Lbs |
Shipping |
| Grade AA |
B2570-12x18x2-AA |
+/-.000050 |
69 |
FedEx |
| Grade A |
B2570-12x18x2-A |
+/-.0001 |
69 |
FedEx |
| Grade B |
B2570-12x18x2-B |
+/-.0002 |
69 |
FedEx |
| Special Post - 12 x 18 x 2 Precision Granite Comparator Stand |
| Special 10in. Post & Clamp - for stem drop indicators |
| Grade |
Our Part# |
Overall Accuracy |
Wt Lbs |
Shipping |
| Grade AA |
B2570-12x18x2-AASP |
+/-.000050 |
69 |
FedEx |
| Grade A |
B2570-12x18x2-ASP |
+/-.0001 |
69 |
FedEx |
| Grade B |
B2570-12x18x2-BSP |
+/-.0002 |
69 |
FedEx |
Frequently Asked Questions
What is a precision granite comparator stand?
A granite comparator stand provides a stable, vibration-resistant inspection platform for precision measurement, part inspection, quality control, calibration, and metrology applications. It is commonly used with dial indicators and test indicators to verify dimensional accuracy of machined parts.
What is the difference between Grade AA, Grade A, and Grade B?
Comparator Stand grade AA offers the highest accuracy for calibration labs, while Grade A and Grade B are commonly used for manufacturing and inspection tasks.
Why is granite used for comparator stands?
Granite offers excellent dimensional stability, wear resistance, corrosion resistance, and vibration damping. Unlike cast iron, granite will not rust and maintains its accuracy over time in inspection and quality control environments.
Where is this granite comparator stand manufactured?
These precision granite comparator stands are proudly made in the USA.
Are custom granite comparator stand sizes available?
Yes. Additional sizes are available beyond the standard models. Contact CNC Specialty Store for custom sizing and application requirements.
How is the precision granite comparator stand shipped?
Our precision granite comparator stands are carefully crated to help protect the granite surface during transit. Shipping methods vary based on size, weight, and destination.
