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CLAMPS for Rectangular Accessories
When rectangular style gage blocks are used with accessories, it is necessary to secure them
 in an accessory clamp.  Without the clamp, the forces encountered when using the
 combination of gage blocks and accessories may break the combination apart.
1. WHEN USING EXTERNAL CLAMPS, THE COMBINATION OF GAGE BLOCKS AND
    ACCESSORIES MUST BE WRUNG TOGETHER BEFORE INSERTING THEM INTO THE
    CLAMPS.   
2. DO NOT RELY ON THE FORCE OF THE CLAMP TO SQUEEZE THE BLOCKS
    TOGETHER.  THIS IS UNRELIABLE AND MAY RESULT IN INACCURATE
    MEASUREMENTS.
3.  IT IS IMPORTANT NOT TO OVERTIGHTEN THE SCREW.  NEVER USE PLIERS.
    OVERTIGHTENING CAN ALTER THE DIMENSIONS OF THE GAGE BLOCKS.  NEVER
    USE MORE PRESSURE THAN IS COMFORTABLE WITH THE THUMB AND INDEX
    FINGER.
The force of the clamp may compress the gage stack and change the length.  Because the 
amount of compression is unknown, the accuracy of measurement may be destroyed.  
 
The screw on the clamp is a simple machine which magnifies force.  A six pound force exerted
 on the circumference of the screw head will result in 235 pounds of force on the gage blocks 
and the clamp.    It is estimated that a 4-inch block would be compressed by approximately 
11 microinches.
Available As:  (Rectangular Style Only)
Rectangular Style
RA 5           0 to 1-1/2 capacity        (0 to 38mm)
RA 6           1-1/2 to 4 capacity        (38 to 100mm)
RA 7           4 to 6-1/2 capacity        (100 to 165mm)
RA 8           0 to 12 capacity            (0 to 300mm)
RA 9           0 to 18 capacity            (0 to 450mm)
RA 10         0 to 24 capacity            (0 to 600mm)
RA 14         0 to 36 capacity            (0 to 900mm)

				
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©2008, Webber Gage Division, The L. S. Starrett Co, Cleveland, Ohio , 44145
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