Manual

INSTRUCTION NUMBER: AO-70136 BA 8of 9
D
C
T
A
A/2
T
W
H
B
L
8.0 USEFUL SPECIFICATIONS
8.1 WEIGHT
Weight lb. (kg.) Each
UPB 1 UPB 2 UPB 3
Complete
Unit
3.7 (1.7) 22 (10) 102 (47)
Without
mounting plate
1.5 (0.7) 12 (5.4) 59 (27)
8.2 RATINGS
SIZE RATING (LB) * ULTIMATE OVERLOAD (%)
UPB 1 25 to 1000 500
1000 to 10000 500
UPB 2
20000 250
UPB 3 10000 to 30000 500
* Ultimate overload: Maximum force applied on the
transducer without risking permanent deformation. For
the Washdown duty UPB the output is linear up to the
point of the ultimate overload.
8.3 SIZING CALCULATION
T = Max Tension
A = Wrap Angle (degrees)
W = Roll Weight
B = Angle of tension force
K = Overload for Transients
(Nominally 1.4 for most applications)
MWF = Maximum Working Force
(This is used to select the proper force rating of the
transducer)
C = Mounting Angle
H = Bearing Height + D
SIZE L (in) D (in)
UPB 1 2.5 0.98
UPB 2 4.5 1.25
UPB 3 6.5 2.10
See figure 9.
SIZING CALCULATION:
* The MWF calculation defines the force on each
individual load cell.
** If Angle b is below horizontal use + in calculation
If Angle b is above horizontal use - in calculation
Note: Consult CMC for assistance in sizing the load cell
to your specific application.
Figure 9
8.4 SELECTION CHART
Transducer MWF (lbs.)
Rating 25 50 100 250 500 1000
UPB1
M846-12171- 000 100 200 300 400 500
Rating 1000 2500 5000 10000 20000
UPB2
M846-12172- 000 100 200 300 400
Rating 10000 20000 30000
UPB3
M846-12173- 000 100 200
Ordering procedure:
1. Calculate the Maximum Working Force
(MWF) rating based upon your calculations
from the sizing calculation equation.
2. From the Selection Chart, determine the part
number for the UPB Washdown-Duty LC.
Select a MWF rating that equals or exceeds the
MWF from your sizing calculation. Then, make
sure that your pillow block bearing fits the UPB
type that you selected (UPB 1, 2 or 3).
Example: If you calculate a MWF of 2,204
lbs., select a UPB 2 rated at 2500 lbs. MWF
from the Selection Chart. You part number
is M846-12172-100. Then, from Figure 2.
make sure that you pillow block bearing fits
on the Size 2 transducer. If it does not,
please consult factory.
3. Obtain pricing and delivery information by
contacting a CMC sales representative,
distributor, or the factory.
[][]
∗∗
∗
±+






=
2L
sinC H-cosC LWB LcosBHsin
2
A
sin 2KT
MWF