ABB DODGE USN 500 Series, Manual

1

WARNING: To ensure the drive is not unexpectedly 

started, turn off and lock-out or tag power source before 

proceeding. Failure to observe these precautions could 

result in bodily injury. 

WARNING: All products over 25 kg (55 lbs) are noted on the 

shipping package. Proper lifting practices are required for 

these products.

WARNING: Because of the possible danger to person(s) 

or property from accidents which may result from the 

improper use of products, it is important that correct 

procedures be followed. Products must be used in 

accordance with the engineering information specified 

in the catalog. Proper installation, maintenance and 

operation procedures must be observed. The instructions 

in the instruction manuals must be followed. Inspections 

should be made as necessary to assure safe operation 

under prevailing conditions. Proper guards and other 

suitable safety devices or procedures as may be desirable 

or as may be specified in safety codes should be provided, 

and are neither provided by ABB nor are the responsibility 

of ABB. This unit and its associated equipment must be 

installed, adjusted and maintained by qualified personnel 

who are familiar with the construction and operation of 

all equipment in the system and the potential hazards 

involved. When risk to persons or property may be 

involved, a holding device must be an integral part of the 

driven equipment beyond the speed reducer output shaft.

DODGE

®

 USN 500 and 600 Series Adapter Mount &  

200 and 300 Series Direct Mount Plummer Blocks

These instructions must be read thoroughly before installation or operation. This instruction manual was accurate at the time of 
printing. Please see 

baldor.com

for updated instruction manuals.

Note! The manufacturer of these products, Baldor Electric Company, became ABB Motors and Mechanical Inc. on 

March 1, 2018. Nameplates, Declaration of Conformity and other collateral material may contain the company name of 

Baldor Electric Company and the brand names of Baldor-Dodge and Baldor-Reliance until such time as all materials have 

been updated to reflect our new corporate identity.

GENERAL INFORMATION

Dodge USN bearings conform with all appropriate ISO 
standards. They are available in either adapter or direct 
mounting styles for 40 mm to 160 mm diameter shafts. A wide 
variety of seals are available including standard metallic LER, 
TRIPLE-TECT™ non-metallic seal with V-ring, Drop-in TRIPLE-
TECT seal with neoprene V-ring, Auxiliary Taconite or Split 
non-metallic. TRIPLE-TECT seal is provided as standard on 
complete assemblies. DODGE USN housings provide you with 
maximum application flexibility. Cast-in dimples allow for easy 
field modification for vents, lube ports and sensors. Oversized 
drains and an oil equalization hole make USN bearings ready for 
circulating oil systems off-the-shelf. For hostile environments, 
USN offers optional cast closed end housings, stainless 
steel hardware kits, and nickel or nylon coating. Complete 
installation, maintenance and modification instructions are 
provided in this manual.

INSPECTION

I

nspect shaft

 — Ensure that the shaft is smooth, straight, 

clean, and within commercial tolerances.

Inspect bearing 

— Do not allow bearing to be exposed to any 

dirt or moisture. Do not remove preservative compound as it 

acts as both a protectant and lubricant and is also compatible 

with standard greases.

Note: Housing caps and bases are not interchangeable. 

They must be matched with mating half. Install non-

expansion bearing first.

Note: For seal types other than TRIPLE-TECT such as drop-

in TRIPLE-TECT, LER, auxiliary seals and split seals follow 

instructions supplied with the seals.

Note: For an explanation of the various dimples and tapped 

holes found on the USN housings, see Table 11.