3-202
Horizontal Alignment
Standard
The combination of offset and angle is a direct indication of the alignment condi-
tion. Optimum alignment occurs when offset and angle are zero. In most cases,
that degree of accuracy is not practical. For that reason, tolerances are used to set
an achievable goal. Emerson’s recommended tolerances (referenced to RPMs) are
listed in the table below.
English Data Units
Speed
(RPM)
Excellent
Acceptable
Offset
(mils)
Angle
(mils/
inch)
Offse
t
(mils)
Angle
(mils/
inch)
< 500
5.0
1.5
6.0
2.0
501 - 1250 4.0
1.0
5.0
1.5
1251 -
2000
3.0
0.5
4.0
1.0
2001 -
3500
2.0
0.3
3.0
0.5
3501 -
7000
1.0
0.25
2.0
0.3
> 7000
.5
0.2
1.0
0.25
Summary of Contents for 2130 RBM Consultant Pro
Page 6: ...vi ...
Page 20: ...1 8 Fixtures Case Layout top section ...
Page 90: ...3 10 Horizontal Alignment ...
Page 364: ...5 22 Straightness Measurements ...