Ideal Precision Instrument Service, Inc.

4539 East Broad St.  Columbus, OH  43213
Phone: (614) 866-1443 / 1- 800- 867-1433
Fax: (614) 866- 5441

Tolerance Classes

Above

To & Including

XXX

XX

X

Y

Z

.010-
.254mm

.825
20.96mm

.00001
.00025mm

.00002
.00051mm

.00004
.00102mm

.00007
.00178mm

.0001
.00254mm

.825-
20.96

1.510
38.35mm

.000015
.00038mm

.00003
.00076mm

.00006
.00152mm

.00009
.00229mm

.00012
.00305mm

1.510-
38.35mm

2.510
63.75mm

.00002
.00050mm

.00004
.00102mm

.00008
.00203mm

.00012
.00305mm

.00016
.00406

2.510-
63.75mm

4.510
114.55mm

.000025
.00063mm

.00005
.00127mm

.0001
.00254mm

.00015
.00381mm

.0002
.00508mm

4.510-
114.55mm

6.510
165.35mm

.000033
.00083mm

.000065
.00165mm

.00013
.00330mm

.00019
.00483mm

.00025
.00635mm

6.510-
165.35mm

9.010
228.85mm

.00004
.001mm

.00008
.00203mm

.00016
.00406

.00024
.00610mm

.00032
.00813

9.010-
228.85mm

12.010
305.05mm

.00005
.00125

.0001
.00254mm

.0002
.00508mm

.0003
.00762mm

.0004
.01016mm

Direction of Tolerances

Plug Gages:

Go Member - Tolerance applied to plus side
No Go member - Tolerance applied to minus side
Master (Bilateral) - Tolerance is equally split plus and minus

Ring Gages:

Go Member - Tolerance is applied to minus side
No Go Member - Tolerance is applied to plus side
Master (Bilateral) - Tolerance is equally split plus and minus

Roundness and Taper and Hardness

Not to exceed 50% of Tolerance
Hardness should be between 58 and 64 as measured on the Rockwell C scale