Accuracy Grade* Measuring Range Blocks Per Set Blocks Included In Sets Catalog No. One Millimeter Base B89.1.9.0 1.0 Through 61.0 in 1.0 mm Steps 2.0 Through 61.0 in .5mm Steps 4.0 Through 61.0 in .25mm Steps 9 3 Blocks 1.0 mm, 2.0 mm, 2.25 mm 4 Blocks 2.5 ,,, 3.0 mm, 5.0 mm, 10.0 mm 2 Blocks 15.0 mm, 25.0 mm RS 9.MA1 B89.1.9 0 3.0 Through 450 (Steps of .001 mm) 2.0 Through 450 (Steps of .01 mm) 45 9 Blocks 1.001 mm Through 1.009mm(Steps of .001mm) 9 Blocks 1.01 MM through 1.09 MM (Steps of .01mm) 9 Blocks 1.1 mm Through 1.9 mm (Steps of .1mm) 9 Blocks 1 mm Through 9 mm (Steps of 1mm) 9 blocks 10 mm Through 90 mm (Steps of 10 mm) RS 45.MA1 B89.1.9 0 3.0 Through 450 (Steps of .005 mm) 2.0 Through 450 (Steps of .001 mm) 1.0 Through 450 (Steps of .01 mm) 1.0 Through 450 (Steps of .1 mm) 88 1 Block .5mm 1 Block 1.0005 mm 9 blocks 1.001 mm Through 1.009 mm (Steps of .001 mm) 49 Blocks 1.01 mm Through 1.49 mm (Steps of .01mm) 18 Blocks 1 mm Through 9.5 mm (Steps of .55mm) 10 blocks 10 mm Through 100 mm (Steps of 10 mm) RS 88.MA1 B89.1.9 0 3.0 Through 250 (Steps of .0005 mm) 2.0 Through 250 (Steps of .001 mm) 1.0 Through 250 (Steps of .01 mm) 1.0 Through 250 (Steps of .mm) 112 1 Block .5 mm 1 Block 1.0005 mm 9 Blocks 1.001 mm through 1.009 mm (Steps of .001 mm) 49 blocks 1.01 mm through 1.49 mm (Steps of .01 mm) 48 Blocks 1mm Through 24.5 mm (Steps of .5mm) 4 Blocks 25 mm Through 100 mm (Steps of 25 mm) RS 112.MA1 Two Millimeter Base B89.1.9 0 6.0 Through 450 (Steps of .001 mm) 4.0 Through 450 (Steps of .01 mm) 2.0 Through 450 (Steps of .11 mm) 45 9 Blocks 2.001 mm Through 2.009mm(Steps of .001mm) 9 Blocks 2.01 MM through 2.09 MM (Steps of .01mm) 9 Blocks 2.1 mm Through 2.9 mm (Steps of .1mm) 9 Blocks 1 mm Through 9 mm (Steps of 1mm) 9 blocks 10 mm Through 90 mm (Steps of 10 mm) R2S 45.MA1 With Commercial Grade Calibration and Etched Serial Numbers. (Master Grade Calibration at Additional Cost) *Gage Tolerance Chart For individual gage blocks please contact us.
B89.1.9.0
2.0 Through 61.0 in .5mm Steps
4.0 Through 61.0 in .25mm Steps
3 Blocks 1.0 mm, 2.0 mm, 2.25 mm
4 Blocks 2.5 ,,, 3.0 mm, 5.0 mm, 10.0 mm
2 Blocks 15.0 mm, 25.0 mm
RS 9.MA1
3.0 Through 450 (Steps of .001 mm)
2.0 Through 450 (Steps of .01 mm)
9 Blocks 1.001 mm Through 1.009mm(Steps of .001mm)
9 Blocks 1.01 MM through 1.09 MM (Steps of .01mm)
9 Blocks 1.1 mm Through 1.9 mm (Steps of .1mm)
9 Blocks 1 mm Through 9 mm (Steps of 1mm)
9 blocks 10 mm Through 90 mm (Steps of 10 mm)
RS 45.MA1
2.0 Through 450 (Steps of .001 mm)
1.0 Through 450 (Steps of .01 mm)
1.0 Through 450 (Steps of .1 mm)
1 Block .5mm
1 Block 1.0005 mm
9 blocks 1.001 mm Through 1.009 mm (Steps of .001 mm)
49 Blocks 1.01 mm Through 1.49 mm (Steps of .01mm)
18 Blocks 1 mm Through 9.5 mm (Steps of .55mm)
10 blocks 10 mm Through 100 mm (Steps of 10 mm)
RS 88.MA1
3.0 Through 250 (Steps of .0005 mm)
2.0 Through 250 (Steps of .001 mm)
1.0 Through 250 (Steps of .01 mm)
1.0 Through 250 (Steps of .mm)
1 Block .5 mm
9 Blocks 1.001 mm through 1.009 mm (Steps of .001 mm)
49 blocks 1.01 mm through 1.49 mm (Steps of .01 mm)
48 Blocks 1mm Through 24.5 mm (Steps of .5mm)
4 Blocks 25 mm Through 100 mm (Steps of 25 mm)
RS 112.MA1
4.0 Through 450 (Steps of .01 mm)
2.0 Through 450 (Steps of .11 mm)
9 Blocks 2.001 mm Through 2.009mm(Steps of .001mm)
9 Blocks 2.01 MM through 2.09 MM (Steps of .01mm)
9 Blocks 2.1 mm Through 2.9 mm (Steps of .1mm)
R2S 45.MA1
*Gage Tolerance Chart
Rectangular Steel®
Gage Block Sets-Metric System Gage Block Sets in Case
Gage Blocks – Major Product Characteristics
Precision gage blocks are the primary standards vital to dimensional quality control in the manufacture of parts. The four major characteristics that are necessary for a precision gage block are accuracy, surface finish, wear resistance and dimensional stability. Other factors are corrosion resistance, hardness, thermal conductivity and coefficient of expansion.
Traditional High G-Grade Steel gage blocks, which are generally used in shop floor environments.
Tungsten Carbide gage blocks, which have the advantage of being harder and longer wearing than steel. (Not available from Webber.)
Ceramic gage blocks have and advantage over regular steel. They will outwear regular steel and they will not corrode.
Chromium Carbide gage blocks are considered the top of the line-the finest available. They outwear regular steel and ceramic. In addition, they will not corrode and are very stable and accurate, and have exceptional "wringing" qualities.
croblox® Chromium Carbide-the superior gage block material. The reason that our Webber Gage Division emphasizes gage blocks made from Chromium Carbide is because they are the most stable measuring devices ever developed.
NO ONE IN THE WORLD EXCEPT STARRETT/WEBBER HAS PRODUCED THE ACCURACY AND STABILITY OF OUR CROBLOX® GRAND MASTERS. They were produced in 1955 of Chromium Carbide material to an accuracy within one millionth of an inch (.0000254 mm) and have been checked periodically by the U.S. National Bureau of Standards and the U.S. National Institute of Standards and Technology (N.I.S.T.) and have remained stable over this period.
Other Characteristics:
Accuracy
All Starrett/Webber gage blocks meet or exceed all known specifications. The flatness, parallelism and surface finish necessary to achieve the required accuracies are the same as or better than government requirements.
Stability
Starrett/Webber gage blocks do not change in size except through normal wear. Gage block stability is a characteristic that our Webber Gage Division has mastered with over seventy years of experience. Our gage blocks have withstood the test of time.
Hardness
Steel blocks have a Rockwell “C” hardness of approximately 64-65. Chromium Carbide blocks have a Rockwell “C” hardness of 71-73, with an unusually fine, hard grain structure which gives them exceptional resistance to wear and abrasion.
Thermal Conductivity and Coefficient of Expansion
These are not important considerations when measurements are taken in temperature-controlled environments. This is primarily done when measuring to microinches or microns. On the shop floor, where precision measurements are rarely finer than .0002
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