Related Resources: mechanical-tolerances
Gauge Blocks Tolerances Specifications Table ASME B89.1.9
Tolerances, Engineering Design & Limits & Fits
Accuracy Specifications of Gage Blocks by ASME B89.1.9 (USA) at 20˚C.
ASME B89.1.9 standard specifies the most important design and metrological characteristics of gage blocks with a rectangular or square cross-section and a nominal length l n ranging from 0.5 mm to 1000 mm for metric sizes and 0.0010 in. to 40 in. for inch sizes. Limit deviations and tolerances are stated for the calibration Grade K and for the Grades 00, 0 , AS-1, and AS-2 for various measuring purposes.
Accuracy of Gauge Blocks by at 68 ˚F.
|
Nominal length (mm) |
Grade K |
Grade K |
Grade 0 |
Grade 1 |
Grade 2 |
||||||||
|
Tolerance |
Tolerance |
Tolerance |
Tolerance |
Tolerance |
|||||||||
|
Rectangular |
Square |
||||||||||||
|
over 0.5 |
up to 50 |
+0.05 |
-0.05 |
+0.05 |
-0.05 |
+0.05 |
-0.05 |
+0.1 |
-0.1 |
+0.15 |
0.15 |
+0.25 |
-0.25 |
|
over 50 |
up to 150 |
+0.05 |
-0.05 |
+0.05 |
-0.05 |
+0.07 |
-0.07 |
+0.1 |
-0.1 |
+0.15 |
-0.15 |
+0.25 |
-0.25 |
|
over 150 |
up to 500 |
+0.1 |
-0.1 |
+0.1 |
-0.1 |
+0.1 |
-0.1 |
+0.15 |
-0.15 |
+0.18 |
-0.18 |
+0.25 |
-0.25 |
|
over 500 |
up to 1000 |
+0.15 |
-0.15 |
+0.15 |
-0.15 |
+0.15 |
-0.15 |
+0.18 |
-0.18 |
+0.20 |
-0.20 |
+0.25 |
-0.25 |
Accuracy of Gauge Blocks by at 68 ˚C.
|
Nominal length (mm) |
Grade K |
Grade K |
Grade 0 |
Grade 1 |
Grade 2 |
||||||||
|
Tolerance |
Tolerance on |
Tolerance |
Tolerance |
Tolerance |
|||||||||
|
Rectangular |
Square |
||||||||||||
|
over 0.01 |
up to 2 |
+2 |
-2 |
+2 |
-2 |
+2 |
-2 |
+4 |
-4 |
+6 |
-6 |
+10 |
-10 |
|
over 2 |
up to 6 |
+2 |
-2 |
+2 |
-2 |
+2 |
-2 |
+4 |
-4 |
+6 |
-6 |
+10 |
-10 |
|
over 6 |
up to 20 |
+4 |
-4 |
+4 |
-4 |
+4 |
-4 |
+6 |
-6 |
+7 |
-7 |
+10 |
-10 |
|
over 20 |
up to 40 |
+6 |
-6 |
+6 |
-6 |
+6 |
-6 |
+7 |
-7 |
+8 |
-8 |
+10 |
-10 |
|
B Grade |
Grade 00 |
Grade 0 |
Grade AS1 |
Grade AS2 |
||||||||
|
Size |
Size Tolerance |
Variation in Length |
Flatness |
Size Tolerance |
Variation in Length |
Flatness |
Size Tolerance |
Variation in Length |
Flatness |
Size Tolerance |
Variation in Length |
Flatness |
|
Thru .050 in. |
±4 |
2 |
2 |
±6 |
4 |
4 |
±12 |
6 |
6 |
±24 |
12 |
10 |
|
(0.5mm) |
(±.10) |
-0.05 |
-0.05 |
(±.15) |
-0.1 |
-0.1 |
(±.30) |
-0.16 |
-0.15 |
(±.60) |
-0.3 |
-0.25 |
|
Thru .400 in. |
± 3 |
2 |
2 |
±5 |
4 |
4 |
±8 |
6 |
6 |
±18 |
12 |
10 |
|
(10.0mm) |
( ± .077) |
-0.05 |
-0.05 |
(±.12) |
-0.1 |
-0.1 |
(±.20) |
-0.16 |
-0.15 |
(±.45) |
-0.3 |
-0.25 |
|
Thru 1.000 in. |
± 3 |
2 |
2 |
±6 |
4 |
4 |
±12 |
6 |
6 |
±24 |
12 |
10 |
|
(25.0mm) |
( ± .07) |
-0.05 |
-0.05 |
(±.15) |
-0.1 |
-0.1 |
(±.30) |
-0.16 |
-0.15 |
(±.60) |
-0.3 |
-0.25 |
|
Thru 2.000 in. |
± 4 |
2 |
2 |
±8 |
4 |
4 |
±16 |
6 |
6 |
±32 |
12 |
10 |
|
(50.0mm) |
( ± .10) |
-0.06 |
-0.05 |
(±.20) |
-0.1 |
-0.1 |
(±.40) |
-0.18 |
-0.15 |
(±.80) |
-0.3 |
-0.25 |
|
Thru 3.000 in. |
± 5 |
3 |
Rect 2 (.05) |
±10 |
4 |
4 |
±20 |
6 |
6 |
±40 |
14 |
10 |
|
(75.0mm) |
( ± .12) |
-0.06 |
Sqr 3 (.07) |
(±.25) |
-0.12 |
-0.1 |
(±.50) |
-0.18 |
-0.15 |
(±1.0) |
-0.35 |
-0.25 |
|
Thru 4.000 in. |
± 6 |
3 |
Rect 2 (.05) |
±12 |
5 |
4 |
±24 |
8 |
6 |
±48 |
14 |
10 |
|
(100.0mm) |
( ± .15) |
-0.07 |
Sqr 3 (.07) |
(±.30) |
-0.12 |
-0.1 |
(±.60) |
-0.2 |
-0.15 |
(±1.2) |
-0.35 |
-0.25 |
|
Thru 5.000 in. |
± 8 |
3 |
Rect 2 (.05) |
±16 |
5 |
4 |
±32 |
8 |
6 |
±64 |
16 |
10 |
|
(125.0mm) |
(±.20) |
-0.08 |
Sqr 3 (.07) |
(±.40) |
-0.14 |
-0.1 |
(±.80) |
-0.2 |
-0.15 |
(±1.6) |
-0.4 |
-0.25 |
|
Thru 6.000 in. |
±8 / -8 |
3 |
Rect 2 (.05) |
±16 |
5 |
4 |
±32 |
8 |
6 |
±64 |
16 |
10 |
|
(150.0mm) |
(±.20) |
-0.08 |
Sqr 3 (.07) |
(±.40) |
-0.14 |
-0.1 |
(±.80) |
-0.2 |
-0.15 |
(±1.6) |
-0.4 |
-0.25 |
|
Thru 7.000 in. |
±10 |
4 |
4 |
±20 |
6 |
6 |
±40 |
10 |
7 |
±80 |
16 |
10 |
|
(175.0mm) |
(±.25) |
-0.09 |
-0.1 |
(±.50) |
-0.16 |
-0.15 |
(±1.0) |
-0.25 |
-0.18 |
(±2.0) |
-0.4 |
-0.25 |
|
Thru 8.000 in. |
±10 |
4 |
4 |
±20 |
6 |
6 |
±40 |
10 |
7 |
±80 |
16 |
10 |
|
(200.0mm) |
(±.25) |
-0.09 |
-0.1 |
(±.50) |
-0.16 |
-0.15 |
(±1.0) |
-0.25 |
-0.18 |
(±2.0) |
-0.4 |
-0.25 |
|
Thru 10.000 in. |
±12 |
4 |
4 |
±24 |
6 |
6 |
±48 |
10 |
7 |
±104 |
18 |
10 |
|
(250.0mm) |
(±.30) |
-0.1 |
-0.1 |
(±.60) |
-0.16 |
-0.15 |
(±1.2) |
-0.25 |
-0.18 |
(±2.4) |
-0.45 |
-0.25 |
|
Thru 12.000 in. |
±14 |
4 |
4 |
±28 |
7 |
6 |
±56 |
10 |
7 |
±112 |
20 |
10 |
|
(300.0mm) |
(±.35) |
-0.1 |
-0.1 |
(±.70) |
-0.18 |
-0.15 |
(±1.4) |
-0.25 |
-0.18 |
(±2.6) |
-0.5 |
-0.25 |
|
Thru 16.000 in. |
±18 |
5 |
4 |
±36 |
8 |
6 |
±72 |
12 |
7 |
±144 |
20 |
10 |
|
(400.0mm) |
(±.45) |
-0.12 |
-0.1 |
(±.90) |
-0.2 |
-0.15 |
(±1.8) |
-0.3 |
-0.18 |
(±3.6) |
-0.5 |
-0.25 |
|
Thru 20.000 in. |
±20 |
6 |
4 |
±44 |
10 |
6 |
±88 |
14 |
7 |
±176 |
24 |
10 |
|
(500.0mm) |
(±.50) |
-0.14 |
-0.1 |
(±1.1) |
-0.25 |
-0.15 |
(±2.2) |
-0.35 |
-0.18 |
(±4.4) |
-0.6 |
-0.25 |
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