Condition : New / Your Choice / See Picture For Sizes / $140-160 Each New Retail
Mitutoyo Rectangular Gage Blocks, Ceramic, Selling Individually, Price is per Each
So much spam, fastest way to get me is text at 817-201-nine nine zero eight
Not much to say here, these are brand new old stock Mitutoyo gage blocks.
As they sell I will mark the sold ones in the main picture here etc.
Below is some gage block grading tolerance history that you may find useful.
Gage/gauge blocks are available in various grades, depending on intended use.
The grading criterion is tightness of tolerance on their sizes; thus higher grades
are made to tighter tolerances and have higher accuracy and precision.
Note: Tolerances will vary within the same grade as the thickness of the block increases.
Year 1964 to 1970:, The Original GGG-G-15, A & Updated B (1970) Specifications Below:
Grade AAA: small tolerance (±0.05 um) used to establish reference standards
Grade AA: (tolerance +0.10 um to −0.05 um) used to calibrate inspection blocks and very high precision gauging
Grade A: (tolerance +0.15 um to −0.05 um) used as toolroom inspection standards for setting other gauging tools
Grade B: large tolerance (tolerance +0.25 um to −0.15 um) used as workshop standards for precision measurement
Year 1975: Original GGG-G-15, C, Revision of previous A & B Specifications Below:
More recent grade designations include (U.S. Federal Specification GGG-G-15C)
Grade 0.5: generally equivalent to grade AAA
Grade 1: generally equivalent to grade AA
Grade 2: generally equivalent to grade A+
Grade 3: compromise grade between A and B
Year 1984: ANSI/ASME B89.1.9M Specifications, which defines both absolute deviations from nominal dimensions and parallelism limits as criteria for grade determination.
B89.1.9M, grades are equivalent to former U.S. Federal grades they are as follows:
Grade 00: generally equivalent to grade 1 (most exacting flatness and accuracy requirements)
Grade 0: generally equivalent to grade 2
Grade AS-1: generally equivalent to grade 3 (stands for American Standard - 1)
Grade AS-2: generally less accurate than grade 3
Grade K: generally equivalent to grade 00 flatness (parallelism) with AS-1 accuracy
Year 2002/2003: The standard underwent a major revision as ASME B89.1.9-2002
(becoming fully effective in January 2003). This update aligned the specification more closely with international ISO 3650 guidelines while retaining traditional North American requirements and introducing new grades like Grade 00, 0, AS1, and AS2.
Year 2023: Revisions: The standard has continued to evolve, with subsequent updates including ASME B89.1.9-2023
Also below is a list of other items I have listed.
Mitutoyo 4" Rectangular Gage Block, GGG Grade 2, New Old Stock
New Mitutoyo 20mm Ceramic Ball Calibration Sphere, No. 99CMM001
Renishaw 1" Tungsten Steel Ball Calibration Sphere, Adjustable Angle Type
Fowler 52-750-012, Master Precision Cylindrical Square
1-1/2 Dia Indexable End Mill x 7-7/8, 1-1/4 Shank 90° 4 F + 10 Inserts
Mitutoyo 543-253B Electronic Dial Indicator, Flat Back
Mitutoyo 543-252 Electronic Dial Indicator Lug Back
Mitutoyo 543-272 Electronic Dial Indicator Lug Back
New Teclock AI-935 Dial Test Drop Indicator, .001 Res, .250 Travel
Cushman Products 1" to JT4 Straight Shank Drill Chuck Arbor, High Quality
New RussellStoll 3328-78 Stainless Steel 60A 3Ph 4wire 240/480 VAC Plug
Check my other listings too while your here, I'll combine as many items as I can.
Buy it now items may be listed locally, I reserve the right to end listing at anytime.
HAVE A QUESTION, just click the "Contact Seller" link at top right of page.
Boulevard Bikes cannot be held liable for any typographical errors in this listing.