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GENERAL CATALOG
Square Gage Block Accessories -
English System
SA 25.A
Square Accessories:  Individually or in
 Sets as Stated Below
   
Catalog
Number
Number of Steel
Accessories Included
Description  
Steel
croblox®
Contained in SA 25.A and
81 thru 88 piece gage
block sets when ordered
with Accessories
Contained in 34 and
36 piece gage
block sets when ordered
with Accessories
Half-Round Jaws**
  .125 Radius
  .250 Radius
:
SA 1.
SA 2.
.
:
2
2
:

2
Straight Jaws**
  .500 Thickness
SA 3.
SA 23.*
2
.
Scriber Point
Center Point .100 C/L
Base Block, .500" Thick
SA 4.
SA 5.
SA 6.
.
1
1
1
1

.
Knurled Screw
Stud
Flat Head Screw
   Long
   Short
Slotted Nut
SA 7.
SA 8.

SA 9.
SA 10.
SA 11.
.
2
2

2
2
2
2
2

2
2
2
Tie Rods:
   3/4" Solid
   1-1/2" Solid
   2-1/4" Solid
   3" Solid
   4-1/2 to 6" Adjustable
   6 to 9" Adjustable
:
SA 12.
SA 13.
SA 14.
SA 15.
SA 16.
SA 17.
.
:
1
1
1
1
1
1
:
1
1
1
1
1
.
   11-3/4" Solid
   15-3/4" Solid
   19-3/4" Solid
SA 18.
SA 19.
SA 20.
.
.
.
NOTE:  *croblox® jaws are not included as a standard item in accessory sets, but may be added as an option at extra cost.
Internal Measuring Machine Jaws:  SA 707.
 These jaws perform the same function as the
 straight jaws, but extend beyond the gage
 surfaces in two directions:  to the left and right.
 For measurements that must have extreme
 accuracy, this feature allows the user to
 compensate for any parallelism error  of the
 gage blocks.

 Designed to use with square style gage blocks,
 Internal Measuring Machine Jaws are made
 of hardened Steel material.  The jaws are 1-inch
 wide by 2-inches long with tightly controlled
 thickness of .500".

 Both side edges are lapped 90° square to the
 gaging surfaces within 30 arc seconds, and
 extend beyond the gage blocks in the
 combination.  

 When this combination of jaws and gage blocks
 are set on a surface plate, the finished sides
 keep the center line of the gage blocks parallel
 with the surface plate. Also, because the sides
 are slightly larger than the gage blocks between,
 the combination only rests on the true surfaces of
 the jaws to prevent any possibility of the
 combination rocking on the surface plate.  All
 these additional features allow for greater control
 and more precise measurements.
SA 707.
WEBBER TOLERANCES:
.500" Thick
  ±10µin.
Squareness of  Sides
  to gaging surfaces
  ±30 sec
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©2008, Webber Gage Division, The L. S. Starrett Co, Cleveland, Ohio , 44145
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