Spur Gears - Norfolk Bearings and Supply Company, Inc.

F
Engineering Information
Analysis of Radial Bearing Loads for Unmounted and Mounted Rolling Elements (Cont’d)
Magnitude of Load Acting on Bearings
Once the applied load or loads that act on the shaft is
determined, we may now apply it to the bearings.
There are many types of loadings that can be imposed
on a bearing:
Straddle Loaded Bearings
Radial Applied Load Acting On Shaft
BRG.
1
LA x B
Load Bearing I = LI =
C
LA x A
Load Bearing II = LII =
C
Check L I + L II = L A
Overhung Loaded Bearings
Radial Applied Load Acting On Shaft
BRG.
1
LA x B
Load Bearing I = LI =
A
LA x C
Load Bearing II = LII =
A
A
A
Check L II – L I = L A
LA
C
BRG.
2
C
B
B
BRG.
2
LA
Example “B”
Load given in Example “A” = 105 lbs. is in overhung
condition, as shown.
LOAD BEARING I
L A x B
L I = A
105 x 1.50
LI =
3.00
LI = 52.5 lbs.
LOAD BEARING II
L A x C
L 2 = A
105 x 4.5
L2 =
3.0
L2 = 157.5 lbs.
CHECK
LII – LI = LA
157.5 – 52.5 = 105
105 = 105
234 Boston Gear 800-825-6544 P-1930-BG 04/10
BRG.
1
3.00
BRG.
2
4.50
1.50
LA
105