This document provides information about different types of needle roller bearings. It describes Cagerol needle bearings which use rollers with end reliefs to increase load ratings by up to 20% compared to standard designs. It also describes Guiderol needle bearings which are suited to applications requiring slower speeds, angular rigidity, high static capacity needs, and limited radial space. The document provides details on bearing components, lubrication methods, seal options, application conditions suited to each type, and examples of common applications that use needle bearings.

1. Needle Roller Bearings

2. Needle
Rollers
Steel
Cage
Machined
Outer ring
Machined race cage type
Needle roller bearing
Channel-shaped outer ring
construction
 Outer ring riding cage
Bore Size: 0.625 - 9.25”
Used in applications with:
 High dynamic load
 Higher speeds
 Limited radial space
Cagerol® Needle Bearings

3. Advantage of the Cagerol® End-Relieved Roller
 Cagerol® bearings utilize rollers with end reliefs to achieve increased
bearing ratings
 Up to a 20% increase in basic dynamic rating over uncrowned
roller designs
 McGill Design provides for higher published load ratings than the
competition
MR 16 Catalog Dynamic Load Rating
4000
5000
6000
7000
8000
9000
McGill IKO INA RBC Torrington
MR Competitors
Lbs
Comp. 1 Comp. 2 Comp. 4Comp. 3

4. Needle
Rollers
Machined
Outer
Retaining
Band
Machined race full
complement needle roller
bearing
Rollers necked at center
 Guide rail integral with outer
race
 Retaining band retains rolling
elements
Applications with:
 Slower speeds
 Angular rigidity
 High static capacity needs
 Limited radial space
Guiderol® Needle Bearings

5. Separable Inner Ring
– Use instead of running
directly on shaft
– Permits use of unhardened
shaft
Relubrication feature in
bore of inner ring
Used with Cagerol® and
Guiderol® Bearings
Inner Ring
Lube Groove
Needle Roller Bearing Inner Rings

6.  Available for Cagerol® or Guiderol®
Bearings
 Rubber lip seal
 Bonded to metal cup
 250 °F (120o
C) max. temperature
 High Temperature Seal Lip Material
– Special Option
– +450 °F (+230
o
C) max. temp.
 Seal can have lip facing:
– Inward (-S, -SS)
– Outward (-RS, -RSS)
– Combination Inward/Outward (-SRS)
-S
-SS
-RS
-RSS
-SRS
Needle Roller Bearing Seal Options

7.  Oil holes and lube groove provided
in
– Outer ring outside diameter
– Inner ring inside diameter
 Sealed bearings factory filled with
grease
– Lithium soap thickened NLGI 1
– Temperature range of -20°F to
250°F (-10°C to 120°C)
 Unsealed bearings have a rust
preventative oil coating only
 Relubrication interval depends on
speed, temperature, environment,
and loads
Needle Roller Bearing Lubrication
Outer Ring
Lube Groove
Inner Ring
Lube Groove
Outer Ring
Oil Hole

8. Application Conditions
Use
Cagerol®
Bearings
Use
Guiderol®
Bearings
Limited radial space  
Thrust supported by other means  
Higher dynamic load rating needed 
Higher static load rating needed 
Moderate to high speeds 
Low to moderate speeds 
Oscillating applications 
More misalignment ( .001 in/in max) 
Misalignment not greater than .0005 in/in 
Lower internal running friction needed 
Greater internal lubricant reservoir needed 
Which Needle Bearing is Best for You?

9.  Cranes
 Sheaves
 Crawler track roller
 Pumps
 Hydraulic gear pumps
 Vane pumps
 Engineered Class Chain
 Industrial Equipment
Transmissions
 Bevel pinion shaft
 Idler gear shaft
 Planetary gears
 Pilot shafts
 Printing Presses
 Oil Field Equipment
 Lift Trucks
 Material Handling
 Extendable Conveyors
 Metal Forming
Needle Bearings Assure Operation in Many Applications