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7.0 LUBRICATION & BEARINGS
7.1 GROUND BRUSH LUBRICATION
For motors provided with a phosphor bronze bristle ground brush
grease lubrication will significantly increase the life of the brush
with no reduction in performance of the brush. Greasing the brush
contact surface while lubricating the bearings is recommended.
7.2 SEALED BEARINGS
The required replacement interval for sealed bearings is generally
determined by the grease life which is dependent on operating
temperature, operating speed, the limiting speed of the bearing
and the type of grease. Under normal operating conditions the
following relationship applies for sealed bearings:
Where:
t = Average grease life (hours)
n = Speed (RPM)
N = Bearing limiting speed with grease lubrication (RPM)
T = Operating temperature (°C)
For further information, please contact Regal for more information.
7.3 OPEN (REGREASABLE) BEARINGS
It should be noted that for motors fitted with ball and roller
bearings, the lubrication intervals for both bearings should be
based on the roller bearing data.
The re-lubrication intervals recommended are calculated on the
basis of normal working conditions.
Replenishment of grease media should be by means of a hand
held grease gun while motor is running with relief plate removed.
The lubricating ability of grease (over time) depends primarily on
the type of grease, the size of the bearing, the speed at which
the bearing operates and the severity of the operating conditions.
Longer bearing life can be obtained if the listed recommendations
are followed:
Grease type (unless nameplate states otherwise)-
•
Nameplate Ambient Temperature between -30°C
(-22°F) to 65°C (150°F) inclusive: Recommended grease
for standard service conditions is Mobil Polyrex
Equivalent and compatible greases include: Texaco Polystar
RB, Rykon
Premium #2, Pennzoil
®*
SRI, SHELL GADUS
®*
Grease types other than those listed above require approval
of the motor manufacturer. (A grease with an EP additive
is not acceptable.)
• Nameplate Ambient Temperature below -30°C (-22°F):
Special low temperature grease is recommended, such as
Aeroshell
* 7 or Beacon
®
SHC 100 for roller bearings.
• Nameplate Ambient Temperature above 65°C (150°F):
Dow Corning
DC44 or equivalent, a special high
®*
temperature grease is required. Note that Dow Corning
DC44 grease does not mix with other grease types. When
re-greasing bearings ensure that the correct type of grease
is used. If in doubt about the existing grease type, clean
out the old grease thoroughly from bearings and bearing
housing, prior to re-greasing.
Pen 2 Lube, Chevron
®*
S5 V100 - 2 & Mobil SHC
325 for ball bearings and Mobil
TM
*The following trademarks are not owned or under the control of Regal Beloit: Mobil, Mobil Polyrex, Mobil SHC and Beacon are trademarks or tradenames
of Exxon Mobil Corporation; Chevron, Texaco Polyrex and Rykon are trademarks or tradenames of Chevron Corporation; Shell Gadus, Aeroshell and Pennzoil
are trademarks or tradenames of Royal Dutch Shell; Dow Corning is a trademark or tradename of The Dow Chemical Company; NEMA is a trademark or
tradename of National Electrical Manufacturers Association; IEC is a trademark or tradename of International Electrotechnical Commission.
NOTE: Under hazardous conditions please contact the nearest
Regal. Air operated grease guns should not be used.
NOTE: If lubrication instructions are provided on the motor
nameplate, the nameplate instructions will superseded these
instructions. Motors marked "Permanently Lubricated" do not
require additional service.
NOTICE: BEARING/MOTOR DAMAGE WARNING
Lubricant should be added at a steady, moderate pressure. If
added under heavy pressure, bearing shield(s) may collapse.
Over greasing bearings greatly increases bearing friction and
can cause premature bearing and/or motor failure.
NOTICE: NEVER MIX GREASE OF DIFFERENT TYPES.
7.4 LUBRICATION PROCEDURE:
NOTE: IEC
Frames 80 through 180 (NEMA
®*
shielded bearings and are not re-greaseable. IEC Frames 200
through 355 (NEMA 320 & above) use open re-greaseable
bearings.
NOTICE: BEARING DAMAGE WARNING
Added grease must be compatible with the original equipment's
grease. If a grease other than those stated herein is to be
used, contact the motor manufacturer. Nameplate information
supersedes grease type referenced in this section. New grease
must be free of dirt. Failure to follow these instructions and
procedures may result in bearing and/or motor damage. For an
extremely dirty environment, contact the motor manufacturer
for additional information.
Step 1: Clean the grease inlet and drain plugs prior to
re-greasing.
Step 2: Remove grease inlet and drain plugs
Step 3: Add grease per table on next page.
Step 4: Re-install grease inlet and drain plugs and ensure
plugs have at least 5 full threads of engagement
with motor
NOTICE: GREASE DRAIN PLUGGED
Old grease may completely block the drain opening and must
be mechanically removed prior to re- greasing. Forcing a blocked
drain open by increased greasing pressure may collapse bearing
shields and/or force excess grease through the bearings and
into the motor.
EM.
®*
®*
®*
100.
®*
©2019, 2020 Regal Beloit Corporation, All Rights Reserved. MCIM2022E • Form# SB0250E
180-280) use
®*
9
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