mounting a rigid base (footed) motor vertically is the responsibility of
the installer.
= $%
' (&
% ? 5 *
Most standard horizontal motors thru
449 Fr. (excluding brake motors) can be mounted in a vertical shaft
down orientation. For vertical brake motors see section 3.3.6.2.
= $%
' (&
% /;*
5 $
6*
& G $? /(
'
%
(
= $%
'
/ %*
Hazardous locations motors must
%
be mounted
vertically shaft up without approval by the motor manufacturer.
Without proper retaining provisions the rotor may move axially and
contact components, creating a spark hazard.
7
$
'
+-
)
0
: The
following frame sizes / constructions with applied (axial) down
loads within the limit stated are acceptable when mounted vertical
shaft up.
% 1
! < 7
$
'
( 3
(-
/
F
B
? +
'
!
56
TEFC &
ODP
Steel
Yes
25 lbs
TEFC
Steel & Cast
Iron
Yes
25 lbs
140
ODP
Steel
Yes
25 lbs
TEFC
All
Yes
35 lbs
180
ODP
Steel
Yes
35 lbs
TEFC
All
Yes
40 lbs
210
ODP
Steel
Yes
40 lbs
TEFC
All
Yes
40 lbs
Steel
Yes
40 lbs
250
ODP
Cast Iron
No
2
N/A
320 TTFC
models
Cast Iron
Eng
1
N/A
All Other
TEFC
Cast Iron &
Aluminum
Yes
30 lbs
ODP
Cast Iron
No
2
N/A
280 320
TEFC &
ODP
Steel
Build Up
Only
4
N/A
TEFC
Cast Iron
Build Up
Only
4
N/A
ODP
Cast Iron
No
2
N/A
360 &
Up
TEFC &
ODP
Steel
Build Up
Only
4
N/A
Notes:
1
For TEFC model numbers beginning with 324TTFC or 326TTFC
consult the motor manufacturer to determine if a build up motor
is required.
2 The max applied down load is any applied load external to the
motor, including such things as sheave weight, fan loads, axial
belt force, pump load, etc. If the application is direct drive with
no applied radial load, consult the motor manufacturer.
3 ”Build up only”, refers to motors that are specifically ordered
and built for shaft up applications. It does not imply that all build
up motors are suitable for shaft up applications.
!,!
;;'
%
((
7'. %
% $*
/%
*
I/ ;
% ?
6 *
Do not connect or couple motor to load until correct rotational direction
is established.
!,!,<
6
$ '* ;$ ; $
' 6
%
of the motor and
driven equipment minimizes vibration levels, maximizes bearing life,
and extends the overall life of the machinery. Consult the drive or
equipment manufacturer for more information.
/%
*
7
$
6
'/$
During assembly do NOT force components onto the shaft. Striking
or hammering the component may result in bearing damage.
!,!,#
? $
%
/;'
6*
Use flexible couplings if possible.
For applications that apply radial, axial or moment loading on the
motor shaft see section 3.3.3.
/%
*
7
$
6
'/$
Unless approved by the motor manufacturer do
%
direct couple a
vertical shaft up or roller bearing motor. Direct coupling a vertical
shaft up motor or a motor with a roller bearing may result in bearing
damage.
!,!,!
? $
%
% ?*
Radial
loading
for
direct
connected equipment (gears, fans etc.) must be approved by the
motor manufacturer unless within the maximum overhung load limits
(Table 3 2). Combined loading (axial, radial and/or moments) must
be approved by motor manufacturer. For belted loads see section
3.3.4.
% 1
! #
B
$
'
1 J
-
(-
B
'
4 -
$
$;
1
!
<
<#
K
143T
106
166
193
210
145T
109
170
199
218
182T
187
230
261
287
184T
193
237
273
301
213T
319
317
470
510
215T
327
320
480
533
254T
500
631
729
793
256T
510
631
736
820
284T
866
990
1100
286T
871
1005
1107
324T
950
1100
1215
326T
950
1113
1230
364T
1078
1365
1515
365T
1078
1380
1540
404T
1388
1590
1762
405T
1400
1610
1780
444T
1580
1795
2005
445T
1520
1795
1985
447T
1455
1765
1985
449T
1640
1885
2130
Values based on 26,280 hrs B 10 Life
For “End of Shaft” Load multiply value by 0.88
To convert from lbf to N multiply value by 4.4482.
!,!,@
7 '% ?*
The goal of any belted system is to efficiently transmit the required
torque while minimizing the loads on the bearings and shafts of the
motor and driven equipment. This can be accomplished by following
four basic guidelines:
1.
Use the largest practical sheave diameter.
2.
Use the fewest number of belts possible.
3.
Keep sheaves as close as possible to support bearings.
4.
Tension the belts to the lowest tension that will still transmit the
required torque without slipping. It is normal for V belts to
squeal initially when line starting a motor
!,!,@,<
(-
) ?
6
*
In general, smaller sheaves produce greater shaft stress and shaft
deflection due to increased belt tension.
See Table 3 3 for
recommended minimum sheave diameters. Using larger sheaves
increases the contact with belts which reduces the number of belts
required. It also increases the belt speed, resulting in higher system
efficiencies.
When selecting sheaves, do not exceed the
manufacturer's recommended maximum belt speed, typically 6,500
feet per minute for cast iron sheaves. Determine belt speed by the
following formula:
