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Bearing Torque Factors and Information || Dynaroll

TECHNICAL INFORMATION

BEARING TORQUE FACTORS



BALL BEARINGS TORQUE FACTORS

FACTOR TORQUE EFFECT
Ball sizeSmaller gives lower torque
Number of ballsFewer gives lower torque
RetainerCrown gives lower torque, loose clinch for ribbon type gives lower torque
Radial playHigher gives lower torque
LubricantHigher viscosity gives higher torque
Lubricant fillHigher percentage gives higher torque
Applied loadHigher load gives higher torque


The chart below can be used as a simple guide to expected average ball bearing torque levels for individual ball bearings with oil lubricant, however, the user must be cautioned that real-life torque values will vary considerably according to the application.

AVERAGE BEARING TORQUE (GM-CM)
DYNAROLL
BEARING SIZE
(Inches Series)
RETAINER
TYPE
BALL SIZE
Inch (mm)
# BALLS
THRUST LOAD (gm)
MAX. AVG. TORQUE (gm-cm), OIL LUBE @ INDICATED THRUST
RADIAL PLAY Inches (mm)
MC2
.0001-.0003
.002-.008
MC3
.0002-.0004
.005-.010
MC5
.0005-.0008
.013-.020
09,0,1,1-4, 1-5 144, 155, 156, 168
Crown (W)
<1/16
<13
75
.18
.15
.14
2-5
Ribbon (J)
1/16
6
75
.18
.15
.14
2-6, 2, 166
Ribbon (J)
1/16
<8
75
.2
.16
.15
188
Ribbon (J)
2
8
400
.63
.54
.49
3
Ribbon (J)
3/32
7
400
.65
.55
.5
4
Ribbon (J)
3/32
8
400
.7
.6
.55