16
DC Motors
Drive End Bearing
Bearing fits in machined cavity in bracket with inner cap. To regrease
bearing, remove bracket (four nuts hold bracket to frame) and inner cap
(two bolts). Clean old grease from bearing and cavity and repack with
Chevron SRI-2 or equivalent grease.
Commutator End Bearing
Bearing has single shield and single seal with seal on side facing
commutator. To regrease bearing, snap out brushes and remove bracket
(four nuts hold bracket to frame). Clean old grease from around bearing and
cavity and repack around bearing and Chevron SRI-2 or equivalent grease.
Amount of grease to be added to motors is shown in
. See
for relubrication interval. Use Chevron SRI-2 or equivalent grease unless
motor nameplate specifies special grease.
Recommended Lubricant
For motors operating in ambient temperatures shown below, use the
following lubricants or their equivalent:
Ball Bearing Motors
Table H Coupled/Belted or Tandem Duty Grease Amounts
Using the table below, determine service condition on the basis of the most
severe operating parameter (i.e. temperature, bearing load, atmosphere, or
operating hours per day).
Table I Service Condition
1
Motors must be specially designed for operation in ambient outside the range of –30 to 40 degrees C
(–22 to 104 degrees F). Special grease is required.
2
“Extreme” service conditions are rare in actual practice. Corresponding lubrication cycles should therefore be
applied with caution. It is also advisable to check with Allen-Bradley for related special instructions.
Operating Temperature:
–25 to 50 degrees C (–15 to 120 degrees F)
Chevron Oil – SRI No. 2
Exxon – Unirex N2
Shell Oil Co. – Dolium R
Texaco, Inc. – Premium RB
Minimum Starting Temperature
–60 degrees C (–76 degrees F)
Shell Oil Co. – Aeroshell 7
Frame
Volume
Weight
Cubic Inches Cubic Centimeters Ounces
Grams
C180ATZ
1.0
16
0.5
14
Service
Condition Ambient Temperature
Bearing Load
Atmosphere
Operating
Hours/Day
Standard
–18 to 40 degrees C
(0 to 104 degrees F)
Steady
Clean
8
Severe
–30 to 50 degrees C
(–22 to 122 degrees F)
1
Medium Shock, Vibration
(less than 0.2 in/sec.)
Medium Dirt,
Abrasives, Corrosion
8 to 24
Extreme
2
–54 to 65 degrees C
(–65 to 149 degrees F)
1
Heavy Shock, Vibration
(more than 0.44 in/sec)
Heavy Dirt,
Abrasives, Corrosion
8 to 24
