MK Diamond Baldor Motor - Manual (Page 25)

Maintenance & Troubleshooting 3-3 MN408
Table 3-4 Bearings Sizes and Types
Frame Size
NEMA (IEC)
Bearing Description (These are the “Large” bearings (Shaft End) in each frame size)
Bearing
Weight of Grease to
add * oz (Grams)
Volume of grease to be added
in 3 teaspoon
56 to 140 (90) 6203 0.08 (2.4) 0.15 0.5
140 (90) 6205 0.15 (3.9) 0.2 0.8
180 (100−112) 6206 0.19 (5.0) 0.3 1.0
210 (132) 6307 0.30 (8.4) 0.6 2.0
250 (160) 6309 0.47 (12.5) 0.7 2.5
280 (180) 6311 0.61 (17) 1.2 3.9
320 (200) 6312 0.76 (20.1) 1.2 4.0
360 (225) 6313 0.81 (23) 1.5 5.2
400 (250) 6316 1.25 (33) 2.0 6.6
440 (280) 6318 1.52(40) 2.5 8.2
440 (280) 6319 2.12 (60) 4.1 13.4
5000 to 5800 (315−355) 6328 4.70 (130) 9.2 30.0
5000 to 5800 (315−355) NU328 4.70 (130) 9.2 30.0
360 to 449 (225−280) NU319 2.12 (60) 4.1 13.4
AC Induction Servo
76 Frame 180 (112)
6207 0.22 (6.1) 0.44 1.4
77 Frame 210 (132) 6210 0.32 (9.0) 0.64 2.1
80 Frame 250(160) 6213 0.49 (14.0) 0.99 3.3
* Weight in grams = .005 DB of grease to be added
Note: Not all bearing sizes are listed. For intermediate bearing sizes, use the grease volume for the next larger
size bearing.
Caution: To avoid damage to motor bearings, grease must be kept free of dirt. For an extremely dirty
environment, contact your Baldor distributor or an authorized Baldor Service Center for additional
information.
Relubrication Procedure Be sure that the grease you are adding to the motor is compatible with the grease
already in the motor. Consult your Baldor distributor or an authorized service center if a grease other than the
recommended type is to be used.
Caution: Do not over−lubricate motor as this may cause premature bearing failure.
With Grease Outlet Plug
1. With the motor stopped, clean all grease fittings with a clean cloth.
2. Remove grease outlet plug.
Caution: Over−lubricating can cause excessive bearing temperatures, premature lubrication breakdown and
bearing failure.
3. Add the recommended amount of grease.
4. Operate the motor for 15 minutes with grease plug removed. This allows excess grease to purge.
5. Re-install grease outlet plug.