BALDOR
Gearmotors and
Gear Products
Motor
Accessories
PT Components
Grinders
Baldor
Mod Express
ABB
Mod Express
Product
Index
428
Baldor Mod Express
Modification
Number
Motor Mod Express
®
Description and List Price
Working Days
Required
M39B
Aegis SGR™ Inpro/Seal CDR™ and Inpro/Seal MGS™
with Labrinth Seal
Shaft grounding rings are specified by many HVAC, pump and conveyor
manufacturers to mitigate ASD circulating currents and prolong bearing life.
These grounding rings are available as an option on Baldor•Reliance custom
motors or they can be installed on a stock motor in Baldor’s Mod Express
and shipped within a few days. Shaft grounding rings are not suited for
Division 1 or 2 areas. On applications where washdown or debris may be
present, internal mounting solutions may be required.
These are sparking devices not suited for explosion-proof Division 1 or 2
applications, even when mounted internally.
The Aegis SGR™ and ±npro/Seal CDR™ rings usually mount to the drive end
of the motor. The ±npro/Seal MGS™ includes their labyrinth seal and will be
mounted on the ODE of the motor, usually under the fan and cover.
NEMA Frame
Shaft Diameter
Shaft Ground Only
Shaft Ground and
Labyrinth Seal
Aegis SGR™
List Price
Inpro/Seal CDR™
List Price
Inpro/Seal MGS™
List Price
56
0.625
203
226
1184
140T, 180
0.875
203
226
1184
180T, 210
1.125
215
272
1213
210T, 250U
1.375
235
320
1242
250T, 280U
1.625
275
383
1541
280T, 320U, 320TS, 360TS
1.1875
333
458
1686
320T, 360U, 400TS
2.125
332
515
1767
360T, 400U, 440TS
2.375
564
*
547
2083
400T, 440U
2.875
718
*
653
2225
440T
3.375
766
*
738
2711
Shaft GroundIng PrIces
*
Motors over 100 Hp / 75 kW require an additional modification to add an insulated bearing on
the opposite drive end. Reference Mod M2F on page 397 to add for one insulated bearing on
the ODE of the motor.
Both Aegis and ±npro/Seal shaft grounding rings are covered by that manufacturer’s warranty
available from their website.
M39C
Shaft Grounding Brush Assembly
Add external shaft grounding brush to motor endplate.
Brush contacts motor shaft diameter.
TWO
DAYS
NEMA Shaft
List Addition
48 - 145T
202
182 - 215T
303
254 - 256T
456
324 - 326T
684
Does Not Apply to Explosion-Proof Motors
M39
Shaft Grounding continued...