Granite Surface Plate, Accessories

Starrett Precision Granite Surface Plates provide an accurate reference surface from which final dimensions are taken for work inspection and for work layout. Their high degree of flatness, overall quality and workmanship also make them ideal bases for mounting sophisticated mechanical, electronic and optical gaging systems.

Granite Surface Plates

We Calibrate and Lap Granite Surface Plates!

No Ledge - Surface Plates

Two Ledge - Surface Plates

Please call for quotes on Granite plates and accessories 864-433-9771

Accessories

Surface Plate Stands

Stationary and rolling stands are available

Surface Plate Cleaner

Keep surface plates and other precision granite products in top condition

Surface Plate Cover

Protect your plates precise flatness and micro-finish from abrasive dust.

Crystal Pink Granite

Black Granite

The Top of the Line

Accurate for use in metrology laboratories and wear resistant for use in abrasive shop environments.

Crystal Pink is the finest, most durable granite surface plate available to industry today. The name is derived from the fact that it has the highest crystalline quartz content of any granite surface plate.

Surface Finish
Even distribution of large quartz crystals provides a smooth finish, which virtually eliminates wear on the surface plate and the instruments used on it. This fine micro-finish, combined with the natural voids in the surface, prevents wringing and provides a velvety-smooth tool action.

Wear Life
Our experience with surface plate performance in customers' plants shows that non-quartz-bearing granite in average daily use requires relapping about once a year. Crystal Pink plates used in these same plants have only required relapping once every three- to five years.

Meets or exceeds U.S. Federal Specification GGG-P-463C for flatness
Great surface hardness and wear resistance – the highest percentage of quartz crystals of any granite plate
Smooth, jewel-like quartz bearing points protect accuracy and finish of both the surface and the tools used on it
Quality and economy combined
Comparable to black granite plates while outwearing them as much as 5 to 1
Meets or exceeds 50 lb. per square foot (24 kg per 1,000 sq. cm) load bearing specifications. Available in 100 lb. (45 kg) test series

Standard-size plates are mounted on resilient support pads, providing isolation from normal vibration and a non-distorting 3-point suspension. Packed one in a crate with skids for forklift handling.

For general inspection work, for working plates throughout the shop and load carrying applications.

The properties of black granite surface plates include a high modulus of elasticity, tight porosity and very fine grain. Since they contain no crystalline quartz, their wear life is less than that of Crystal Pink. However, they have a very fine finish and meet flatness requirements equally well.

The high modulus of elasticity allows these plates to be made thinner. They will take a 50 lb. per square foot (24 kg per 1,000 sq. cm) concentrated load per U.S. Federal Specification GGG-P-463c and not deflect more than half of the flatness tolerance specified. Thicker plates designed for 100 lb. per square foot (48 kg per 1,000 sq. cm) loading are also available by request.

Standard size plates are mounted on resilient support pads, providing isolation from normal vibration and a non-distorting 3-point suspension. Packed one in a crate with skids for forklift handling.

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Granite Surface Plate, Accessories