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Image by Anthony Shane

Filters

Standard Replacement Filters

Reliance Style Replacement Filters

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Special MEC9/REL

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Pre-Filter Wraps

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Image by Anthony Shane

Standard Replacement Filters

We offer standard replacement filters compatible with all makes of DC motors, including US/Emerson, Baldor/Powertrol, General Electric, and more.

Our filters come fully assembled and ready to mount on your cooling blower, providing a convenient, reliable solution for maintaining motor performance

FRAME

​

180-210AT

​

250AT

​

280AT

​

320AT

​

360AT

​

400AT

​

500AT

​

500AT

PART #

​

3-F

​

3-F

​

4-F

​

6-F

​

6-F

​

6-F

​

8-F

​

9-F

FILTER ASSEMBLEY​

DIMENSIONS

​

6-1/4" X 5-1/4"​

​

6-1/4" X 5-1/4"

​

7-7/8" X 7/1/2"

​

10" X 10"

​

10" X 10"

​

10" X 10"

​

10" X 10"

​

10" X 12"

FLANGE

OPENING

​

4.0"

​

4.0"

​

5.0"

​

6.0"

​

6.0"

​

6.0"

​

8.0"

​

8.0"

Image by Anthony Shane

Reliance Style Filters

We provide high-quality replacement filters specifically designed for Reliance Electric DC motors and compatible with Baldor/Reliance units.

These filters feature a 3-bolt hole pattern, an open-style top, and a corrugated metal mesh wrapped with polyvinyl for added strength. Each unit is shipped fully assembled and ready to mount. A set of three metric thru-bolts is available separately if needed.

FRAME

​

C180ATZ

​

CE113ATZ

C2512ATZ

​

C2115ATZ

C2514ATZ

C2151ATZ

C2812ATZ

C2815ATZ

C3212ATZ

C3214ATZ

​

C3162ATZ

​

C3613ATZ

C400ATZ

RELIANCE

PART NUMBER

​​

417077-57

​

417077-58

417077-58

​

417077-59

417077-59

417077-59

417077-59

417077-59

417077-59

417077-59

​

417077-65

​

417077-102

417077-102

OUR PART 

NUMBER

​​

REL-3

​

REL-4

REL-4

​

REL-6

REL-6

REL-6

REL-6

REL-6

REL-6

REL-6

​

REL-8

​

REL-9

CALL FOR QUOTE

ASSEMBLY 

DIMENSIONS

(DIAM X LENGTH)​​

6.81 X 6.12

​

9.12 X 6.12

9.12 X 6.12

​

9.12 X 9.62

9.12 X 9.62

9.12 X 9.62

9.12 X 9.62

9.12 X 9.62

9.12 X 9.62

9.12 X 9.62

​

10.88 X 9.62

​

10.88 X 12.00

-

​

C - TO - C = 

​​​

5.50"

​

6.90"

6.90"

​

6.90"

6.90"

6.90"

6.90"

6.90"

6.90"

6.90"

​

8.42"

​

8.42"

-

Image by Anthony Shane

Special MEC9/REL

Flange Bottom: 13.50" OD

Filter: 10.88" OD × 12.50" Tall

Open Filtered Top

Flange sizes can be customized to meet your requirements.

This is a replacement filter for 
Regal Rexnord / Marathon Electric

Image by Anthony Shane

Pre-Filter Wraps

Pre-filter wraps help extend the life of your filters
and improve overall performance..

Made from 5/8" thick polyester media,
they provide high arrestance
while maintaining low resistance to airflow.

​

Fibers are blended to allow depth loading of particles, and a pressure-sensitive dry tackifiber
on the air-leaving side holds dirt securely.

 

Available for filter sizes 3 through 11, these wraps are easy to install — simply wrap around your filter and secure with the Velcro tabs.

Columbus Fan & Machine

PHONE: (401)247-0079

EMAIL: ColumbusFanRI@gmail.com

​DC Industrial Sales

PHONE: (401-)245-3330

EMAIL: DCIndustrialSales@Gamil.com

Customer Support is our main focus!

INDUSTRIAL  &  RESIDENTIAL
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© 2025 Columbus Machine/DC Industrial

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