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Chicago Dial Indicator

American Made Precision Measuring Products Since 1932

A series of Black Granite Base Comparators designed to meet the requirements of both the large and small shop. These granite bases are Laboratory Grade, offer a smooth surface, are nonabrasive and extremely hard for an accurate reference plane for work inspection.

Our granite bases are manufactured from high quality black granite, quarried in California. This material has been carefully evaluated to assure a high modulus of elasticity, complying with federal specifications and user requirements. Government tests have shown that fine-grained black granites are stronger, denser and less absorptive than other granites.

Since black granites contain no crystalline quartz and little mica, they have a very high modulus of elasticity, producing superior load-carrying capacity. Black granites have uniformly fine textures and tight porosity, characteristics which make this igneous rock extremely resistant to water absorption or warping from humidity. The superior stiffness of black granites is highly desirable for surfaces where accuracy and stability are essential.

granite stand

 

Note: To view all table data, scroll table left and right.

6" x 6" x 2" (Grade AA .00005")

These 6" x 6" x 2" granite bases are supplied with a 1.25" diameter, 8" tall column and an indicator arm (rigid or with a fine adjustment knob). Indicator arms are available in lug or stem mount. Indicator arms have a throat depth of 1.75" and can be raised to a height of 6" depending on the type of mount used.

EDP#DescriptionPrice 
6066-20pdf 6" X 6" X 2" ADJUSTABLE ARM, LUG MOUNT W/O IND. $276.00 Call to Order
6066-20Spdf 6" X 6" X 2" ADJUSTABLE ARM, STEM MOUNT W/O IND. $276.00 Call to Order
6066pdf 6" X 6" X 2" RIGID ARM, LUG MOUNT W/O IND. $246.00 Call to Order
6066-Spdf 6" X 6" X 2" RIGID ARM, STEM MOUNT W/O IND. $246.00 Call to Order

8" x 12" x 2" (Grade A .0001")

These 8" x 12" x 2" granite bases are supplied with a 1.25" diameter, 12" tall column and an indicator arm (rigid or with a fine adjustment knob). Indicator arms are available in lug or stem mount. Indicator arms have a throat depth of 4"-5" and can be raised to a height of 7.5"- 9.5" depending on the type of mount used.

EDP#DescriptionPrice 
60812-1pdf 8" X 12" X 2" ADJUSTABLE ARM, LUG MOUNT W/O IND. $393.00 Call to Order
60812-1Spdf 8" X 12" X 2" ADJUSTABLE ARM, STEM MOUNT W/O IND. $393.00 Call to Order
60812-1Rpdf 8" X 12" X 2" RIGID ARM, LUG MOUNT W/O IND. $380.00 Call to Order
60812-1RSpdf 8" X 12" X 2" RIGID ARM, STEM MOUNT W/O IND. $380.00 Call to Order
Add Suffix -REV to reverse column hole to 12" side of granite base add $50 +$50.00  
       
  18" column and 24" column available upon request    

12" x 18" x 4" (Grade A .0001")

These 12" x 18" x 4" granite bases are supplied with a 1.25" diameter, 12" tall column and an indicator arm (rigid or with a fine adjustment knob). Indicator arms are available in lug or stem mount. Indicator arms have a throat depth of 4"-5" and can be raised to a height of 7.5"- 9.5" depending on the type of mount used.

EDP#DescriptionPrice 
61812-1pdf 12" X 18" X 4" ADJUSTABLE ARM, LUG MOUNT W/O IND. $540.00 Call to Order
61812-1Spdf 12" X 18" X 4" ADJUSTABLE ARM, STEM MOUNT W/O IND. $540.00 Call to Order
61812-1Rpdf 12" X 18" X 4" RIGID ARM, LUG MOUNT W/O IND. $530.00 Call to Order
61812-1RSpdf 12" X 18" X 4" RIGID ARM, STEM MOUNT W/O IND. $530.00 Call to Order
Add Suffix -REV to reverse column hole to 12" side of granite base add $50 +$50.00  
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