Felt Seal Standard
Positive sealing for low, medium, and high
speed operation.
Single Lip Contact Seal
Available on all sizes. Recommended where
moisture conditions prevail.
Hi-Temp Seal
Available as an option where operating
temperatures are in 250-400° range.
* Insert package includes factory lubed, adjusted, and sealed cartridge complete
with single or double locking collars.
† Contact Customer Service Center for availability.
For Load Ratings, See Page 121.
ROLLER BEARING RATING TABLES
LOAD RATING TABLES - RPB ROLLER BEARINGS
This chart displays the Sealmaster RPB Roller Bearing’s load capacity for a given L10 life, speed, and shaft size.
Areas designated by “-” exceed maximum value for standard bearings. Consult Sealmaster Application Engineering for load and speed
applications not covered in this table or for operation at high speeds or high loads.
REVOLUTI O NS PER M I NU T E
SHAFT
SIZ E
1 3/ 16
1 1/4
1 3/8
1 7/ 16
1 1/2
1 5/8
1 11/ 16
1 3/4
1 15/ 16
2
2 3/ 16
2 1/4
2 7/ 16
2 1/2
2 11/ 16
2 3/4
2 15/ 16
3
3 3/ 16
3 7/ 16
3 1/2
3 15/ 16
4
4 7/ 16
4 1/2
4 15/ 16
5
For high load-high speed applications, see page 204.
For Bearing Selection and Engineering, see page 176.
All RPB Series Pillow Block, Flange and Piloted Flange Units can be provided with
to resist corrosion in many difficult environments.
matrix with a fluoropolymer rich surface on a molecular binder layer that provides significant application
advantages in harsh atmospheres:
• Excellent corrosion-resistance.
• Excellent weathering resistance.
• Hard (Matrix) polymer resists abrasion.
• Molecular binder resists peeling, etc.
• Standard silver color blends well with other equipment.
• A wide variety of other colors available on special order.
• Fluropolymer means “Non-Stick”.
RPB-CR bearings feature a corrosion-resistant
“CR” housings
All The Longer Life
Features...
Plus A
Corrosion-Resistant
Polymer Coating
• Split housing, entirely
polymer coated,
• Polymer coated Locking Collars.
• Polymer coated Cap bolts.
including bore.
Other Components:
• Stainless Steel Grease Fitting.
• Stainless Steel Washers.
• Standard Contact Seal.
• Black Oxide Outer Race.
• Standard Setscrews.
For more information on wet environments, see applications section, page 136.
122
MOUNTED ROLLER BEARINGS
SEALMASTER Corrosion-Resistant
Mounted Roller Bearings
Take On The Tough Applications...
We begin with the best...
and then improve the design to the most
demanding specific services.
The RPB Series Bearings are used in applications where they may be subjected to moisture,
corrosive and abrasive atmosphere. Typical applications include:
• Food Processing Equipment.
• Chemical Processing Plants.
• Rubber and Plastic Plants.
• Pulp and Paper Mills.
• Marine and Naval Applications.
• Waste Water Treatment Facilities.
• Bulk Material Handling.
Fluoropolymer
Rich Surface
Non-stick release layer...
resistant to most
chemical attacks.
Fluoropolymer
and Binder Matrix
Hard dense materials that have
excellent wear and abrasion
resistance; resistant to most
hydrocarbon solvents...
all but the most concentrated acids...
detergents, bases up to PH 11...
high temperatures, up to 400°F (204°C)
continuous duty...as well as atmospheric
corrosion conditions.
How To Specify:
Sealmaster RPB-CR Units are
identified on the metal nametag.
To specify, add "CR" to the basic
part number: "RPB215-2CR"
Molecular Binder Layer
Provides peeling-resistant
bond...reduces burrowing/
blistering and adds to
corrosion protection.
UNIQUE...UNCHALLENGED...THE UNDISPUTED LEADER
IN QUALITY, VALUE-ADDED ADVANTAGES
AND CUSTOM DESIGNS
123
TOUGH
AS THEY COME!
SEALMASTER RPB-AH
With Enhanced Performance...
for the World-Wide HVAC Industry...
Air Handling
Roller bearing units for
HVAC applications are subjected to
a number of unique challenges that
include:
1. Running at
2. Exposure to
3. Running with
4.Mounting on fan frames that have reduced
structural
SEALMASTER RPB-AH tapered roller
bearings units are
engineering features that address each of
these challenges,
performance in air handling services. Here are
several reasons why...
HIGH LOAD CAPACITIES... RPB-AH Tapered roller
bearings offer both high radial as well as high thrust
load capacities, or any combination of the two.
Spherical roller bearings, on the other hand, are
known for their thrust capacity, and are generally not
selected/specified for vertical shaft applications which
are often encountered in HVAC.
higher
vibration
low
mass.
operating speeds.
.
noise levels.
specially-designed with
and offer overall enhanced
not
Roller Bearings...
CUSTOM FIT-UP... Sealmaster engineers have
developed a custom fit-up between the bearing
cartridge O.D. and the bearing housing specifically for
air handling applications. This fit is looser than standard
which provides lighter misalignment torque. Fan frames
are generally light weight which may deflect before the
bearing insert adjusts for misalignment in standard
units. This special feature also allows full roller contact
with the races and reduces roller edge loading in the
bearing.
PINNED OUTER RACE PREVENTS ITS ROTATION...
The RPB-AH bearing has a self-aligning
capability of
concept to the proven SEALMASTER
ball bearing units which utilize a
spherical O.D. insert mounted in a
spherical I.D. cast iron housing,
equipped with a locating pin. This
anti-rotation pin prevents outer race
rotation under load and does not limit
the RPB-AH self-aligning capability.
The extensions on the cartridge inserts limit
misalignment to ± 3°.
For more information on air handling, see applications section, page 132.
124
± 3°.
This design is similar in
± 3°
MOUNTED ROLLER BEARINGS
DURABLE CAST IRON SPLIT HOUSING - Compact split housing provides quickest replacement of bearing
inserts, reduced downtime and replacement costs.
PATENTED FELT LABYRINTH SEALS - Proven design directs contaminants away from sealing surfaces, provides
a tight fit to exclude foreign material; once grease permeates the felt there’s a lower coefficient of friction ( or reduced
drag), less heat generation, extended operating life.
EXTENDED INNER RACES - With double locking collars provides a more secure locking system, more holding
power and greater stability on the shaft.
MORE CHOICES... MORE STYLES AND SIZES
Air Handling - Self Aligning Roller Bearing Units
SHAFT SIZE
INCH
1 3/ 16 - 1 1. 4
1 3/ 8 - 1 7/ 16
1 1/2 - 1 11/16
1 3/ 4 - 2
2 3/ 16
2 1/ 4 - 2 1/ 2
2 11/16 - 3
3 3/ 16 - 3 1/ 2
3 15/16 - 4
4 7/ 16 - 4 1/ 2
4 15/16 - 5
SPECIFICATIONS
n Available as Air Handling Units.
Replacement Cartridge inserts, see page 120.
**HVAC applications are normally lightly loaded but may require higher speed capability. For these applications consult Sealmaster Engineering for assistance.
• HIGH TEMPERATURE OPERATIONS - Standard
bearings can be modified for operation at higher
temperatures.
For more details on full range of features and benefits,
2 BOLT PILLOW
BLOCKS
RPB
■
■
■■
■■
■■■■
■■■■
■■■■
104105,107,108104,111105107,108114115116117
RPB-A
DRPB
DRPB-A
----
----
4 BOLT PIL LOW B L OCKS
RPB
RPBXT
---
---
■■■■
■
RPB- A
----
DRPB
DRPB- A
-
-
-
RFBRFB-ARF PRFP-A
■
■
■
■■■■
■■■■
■■■■1750
■■■■
HOW TO SPECIFY:
SEALMASTER RPB-AH Air
Handling units are clearly
identified on the special
metal nameplate
-
to specify, add the
“AH” to the basic
part number:
“RPB-207-2AH”
FLANGE BL OCKS
PILOTED FLANGES
-
-
-
-
■
■
■
■■
■
MAX
SPEEDS**
-
-3500
-3000
-1250
4000
2500
2500
1500
1250
refer to pages 98-103.
NAMEPLATE IDENTIFICATION
RPB-AH Air Handling units are identified with a special
SEALMASTER metal nameplate indicating that they
are equipped with the special housing fit and are
custom engineered for HVAC Air Handling applications.
125
TOUGH
AS THEY COME!
SEALMASTER RPB-M
Series Metric Bore Bearings
The RPB-M Series Metric bore bearing
as shown in the Table on the opposite page. These metric bearings have the full range of features and benefits of
the RPB Series self-aligning bearings described in detail on pages 98-103.
is available in the full range of sizes and various mounted bearing styles
Three basic sealing arrangements
are offered for the RPB-M Metric Bore
Bearing...
Patented Felt Labyrinth Seal...
Directs contaminants away from the sealing
surfaces... provides a tight fit to exclude foreign
material... has less drag (friction) and less heat
generation than radial lip contact seals;
provides positive sealing for low, medium, and
high speed operation.
Single Lip Contact Seal...
Available in all sizes... recommended where
moisture conditions prevail... functions well in
wet and dirty environments up to 250°F... has
good chemical resistance properties.
126
SEALMASTER
Metric bore RPB bearings
incorporates a metric bore
from 35 - 125mm and is furnished with
metric setscrews. All other components and
hardware are standard.
High Temperature Seal...
Available extra-cost option where operating
temperatures are in the 250 - 400°F range;
units with these sealing arrangements are
prelubricated at the factory with a special high
temperature synthetic lubricant which is
normally satisfactory for the temperature range
0f -40°F to +400°F.