G r a n i t e   P l a t e s ,   B l o c k s ,   a n d   S t a n d s

Granite surface plates offer very accurate, stable, precision surfaces that can be used for layout, gaging, and inspection. These plates also can be used as bases for fixtures, coordinate measuring machines, and other machines. They are self supporting, have a low co-efficient of expansion, and have a low degree of surface deflection under normal loads.

Challenge granite surface plates meet or exceed Federal Specification GGG-P-463c and are in compliance with MIL-STD-45662A. Final inspection and calibration of every surface plate is accomplished by use of the Auto-Collimator. A certificate of accuracy, traceable to the National Institute of Standards and Technology (formerly National Bureau of Standards) is furnished with all granite surface plates.

Challenge granite surface plates are available in three grades. The repeat reading tolerances for each grade are as follows:

Grade AA Laboratory - 25 millionths            

Grade A Inspection - 50 millionths                 

Grade B Toolroom - 100 millionths                      

All plates have a thickness capable of supporting a total normal load equal to 100 pounds for each square foot of surface plate area loaded in the center of the plate without deflecting the plate along a diagonal more than one-half the flatness tolerance (per Federal Specification GGG-P-463c).

Sizes available: 8 x 12 x 2 to 48 x 96 x 14 (inches)

Surface Plates- No Ledge -Technical&Order Information

Surface Plates-2 Ledge- Technical&Order Information

Surface Plates-4 Ledge-Technical&Order Information

Technical&Order Information

Cabinet stands are constructed using square steel tubing and heavy gauge steel. Leveling screws are provided on the bottom of each leg. The standard working height is 36".

Sizes available: 24 x 36 to 48 x 72 (inches)

Technical&Order Information

This stand is manufactured with the same high quality as our other stands but now provides the convenience of sliding drawers. Each drawer can hold up to 400 lbs of equipment.

Sizes available: 24 x 36 to 36 x 48 (inches)

Technical&Order Information

These stands are available for all granite plates 18 x 24 and larger. Stationary stands have leveling screws at the bottom of each leg. Castered stands are furnished with two fixed and two swivel casters for easy movement. The stands are made according to plate thickness to give an overall working height of 36".

Sizes available: 18 x 24 to 48 x 96 (inches)

GRANITE ACCESSORIES