User Guide

mounting a rigid base (footed) motor vertically is the responsibility of
the installer.
VERTICAL SHAFT DOWN: 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.
VERTICAL SHAFT UP:
WARNING: HAZARDOUS LOCATIONS VERTICAL
MOUNT: Hazardous locations motors must NOT 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.
Belted or Radial Load when mounted vertically : The
following frame sizes / constructions with applied (axial) down
loads within the limit stated are acceptable when mounted vertical
shaft up.
Table 3-1 Belted or Radial Load Applications (All speeds)
Frame
Size
Enclosure Construction
Shaft Up
OK
Max
Applied
Down
Load
3
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.
3.3 APPLICATION ASSEMBLY TO MOTOR:
CAUTION: EQUIPMENT DAMAGE:
Do not connect or couple motor to load until correct rotational direction
is established.
3.3.1 GENERAL: PROPER ALIGNMENT 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.
CAUTION: BEARING FAILURE
During assembly do NOT force components onto the shaft. Striking
or hammering the component may result in bearing damage.
3.3.2 DIRECT COUPLING: Use flexible couplings if possible.
For applications that apply radial, axial or moment loading on the
motor shaft see section 3.3.3.
CAUTION: BEARING FAILURE
Unless approved by the motor manufacturer do NOT 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.
3.3.3 DIRECT CONNECTED: 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.
Table 3-2 Maximum Radial Load (lbf) @ Middle of the Shaft
Extension Length
Motor Rated RPM
Frame
Number
3600 1800 1200 900
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.
3.3.4 BELTED:
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
3.3.4.1 Sheave Diameter Guidelines:
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: