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Precision ball bearings
are manufactured to standards established by the Annular Bearing Engineers
Committee (ABEC) of the American Bearing
Manufacturers Association (ABMA). These standards have been accepted
by the American National Standards Institute (ANSI) and conform essentially
to the standards set by the International Standards Organization (ISO).
IMPORTANT NOTE - The ABEC and ISO bearing standards are primarily concerned
with bearing tolerances. While tolerance is an important factor in the
performance
of a bearing, there are many other factors that also affect the suitability
of a bearing to its application. ABEC and ISO standards do not cover:
radial play, raceway curvature, surface finish, material, ball complement,
number, size or precision level, retainer type, lubrication, torque,
cleanliness
at assembly, packaging and other factors that may be essential to the
desired bearing performance.
Inner Ring Tolerances - Inches (mm) |
|
TYPE |
OD SIZE |
ABEC1 |
ABEC 3 |
ABEC 5 |
ABEC 7 |
ISO Normal |
ISO P6 |
ISO P5 |
ISO P4 |
Mean Bore Tolerance |
ALL |
0 to .709 |
0 to -.0003 |
0 to -.0002 |
0 to -.0002 |
0 to -.0002 |
(0 to 18) |
(0 to -.008) |
(0 to -.005) |
(0 to -.005) |
(O to -.005) |
2 PT Out of Roundness |
ALL |
0 to .709 |
NS |
NS |
0.0001 |
0.0001 |
(0 to 18) |
(0.003) |
(0.003) |
Bore Taper |
ALL |
0 to .709 |
NS |
NS |
0.0001 |
0.0001 |
(0 to 18) |
(0.003) |
(0.003) |
Radial Runout |
ALL |
0 to .709 |
0.0003 |
0.0002 |
0.00015 |
0.0001 |
(0 to 18) |
(0.008) |
(0.005) |
(0.004) |
(0.003) |
Face Runout With Bore |
ALL |
0 to .709 |
NS |
NS |
0.0003 |
0.0001 |
(0 to 18) |
(0.008) |
(0.003) |
Face Runout |
ALL |
0 to .709 |
NS |
NS |
0.0003 |
0.0001 |
(0 to 18) |
(0.008) |
(0.003) |
Width Variation |
ALL |
0 to .709 |
NS |
NS |
0.0002 |
0.0001 |
(0 to 18) |
(0.005) |
(0.003) |
Ring Width Toerance |
ALL |
0 to 1.1811 |
0 to -.005 |
0 to -.005 |
0 to -.001 |
0 to -.001
|
(0 to 30) |
(0 to -.125) |
(0 to -.125) |
(0 to -.025) |
(0 to -.025) |
Outer Ring
Tolerances - Inches (mm) |
| |
TYPE |
OD SIZE |
ABEC 1 |
ABEC 3 |
ABEC 5 |
ABEC 7 |
| ISO Normal |
ISO P6 |
ISO P5 |
ISO P4 |
| MEAN OD TOLERANCE |
ALL |
0 to .709 |
+0 to -.0003 |
+0 to -.0003 |
+0 to -.0002 |
+0 to -.0002 |
| (0 to 18) |
(+0 to -.008) |
(+0 to -.008) |
(+0 to -.005) |
(+0 to -.005) |
| .709 to 1.1811 |
+0 to -.0004 |
+0 to -.0003 |
+0 to -.0002 |
+0 to -.0002 |
| (18 to 30) |
(+0 to -.010) |
(+0 to -.008) |
(+0 to -.005) |
(+0 to -.005) |
| MAX OD TOLERANCE LIMITS |
OPEN |
0 to .709 |
+.0001 to -.0004 |
+.0001 to -.0004 |
+0 to -.0002 |
+0 to -.0002 |
| |
(0 to 18) |
(+.003 to -.010) |
(+.003 to -.010) |
(+0 to -.005) |
(+0 to -.005) |
| |
.709 to 1.1811 |
+.0001 to -.0005 |
+.0001 to -.0004 |
+0 to -.0002 |
+0 to -.0002 |
| |
(18 to 30) |
(+.025 to -.010) |
(+.025 to -.010) |
(+0 to -.005) |
(+0 to -.005) |
| |
0 to .709 |
+.0002 to -.0005 |
+.0002 to -.0005 |
+.00004 to .00024 |
+.00004 to .00024 |
| SHIELDED |
(0 to 18) |
(+.005 to -.012) |
(+.005 to -.012) |
(+.001 to -.006) |
(+.001 to -.006) |
| |
.709 to 1.1811 |
+.0002 to -.0006 |
+.0002 to -.0005 |
+.00004 to .00024 |
+.00004 to .00024 |
| |
(18 to 30) |
(+.005 to -.015) |
(+.005 to -.012) |
(+.001 to -.006) |
(+.001 to -.006) |
| OD 2 PT OUT OF ROUNDNESS |
OPEN |
0 to .709 |
NS |
NS |
0.0001 |
0.0001 |
| |
(0 to 18) |
- |
- |
(0.0025) |
(0.0025) |
| |
.709 to 1.1811 |
- |
- |
0.0001 |
0.0001 |
| |
(18 to 30) |
NS |
NS |
(0.0025) |
(0.0025) |
| SHIELDED |
0 to 1.1811 |
- |
- |
- |
- |
| |
(0 to 30) |
NS |
NS |
0.0002 |
0.0002 |
| |
- |
- |
- |
(0.005) |
(0.005) |
| OD TAPER |
OPEN |
0 to 1.1811 |
NS |
NS |
0.0001 |
0.0001 |
| |
(0 to 30) |
- |
- |
(0.0025) |
(0.0025) |
| |
0 to 1.1811 |
NS |
NS |
- |
- |
| SHIELDED |
(0 to 30) |
- |
- |
0.0002 |
0.0002 |
| |
- |
- |
- |
(0.005) |
(0.005) |
| RADIAL RUNOUT |
ALL |
0 to 1.1811 |
0.0006 |
0.0004 |
0.0002 |
0.00015 |
| (0 to 30) |
(0.015) |
(0.01) |
(0.005) |
(0.004) |
| OD RUNOUT WITH FACE |
ALL |
0 to .709 |
NS |
NS |
0.0003 |
0.00015 |
(0 to 18) |
NS |
NS |
(0.008) |
(0.004) |
| FACE RUNOUT |
STRAIGHT |
0 to 1.1811 |
- |
- |
0.0003 |
0.0002 |
| |
(0 to 30) |
- |
- |
(0.008) |
(0.005) |
| |
|
NS |
NS |
- |
- |
| FLANGED |
0 to -1.1811 |
- |
- |
0.0003 |
0.0003 |
| |
(0 to 30) |
NS |
NS |
(0.008) |
(0.008) |
| WIDTH VARIATION |
ALL |
0 to 1.1811 |
- |
- |
0 to -.002 |
0 to -.0001 |
| (0 to 30) |
NS |
NS |
(0 to -.005) |
(0 to -.003) |
| FLANGE WIDTH TOLERANCE |
|
0 to 1.1811 |
0 to -.002 |
0 to -.002 |
0 to -.002 |
0 to -.002 |
| (0 to 30) |
(0 to -.050) |
(0 to -.050) |
(0 to -.050) |
(0 to -.050) |
| FLANGE DIAMETER TOLERANCE |
|
0 to 1.1811 |
+.005 to .002 |
+.005 to .002 |
0 to -.001 |
0 to -.001 |
| (0 to 30) |
(+.125 to -.050) |
(+.125 to -.050) |
(0 to -.025) |
(0 to -.025) |
|
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