Selection
STANDARD PART NUMBER EXAMPLE
PM486FE-60-747-D-024
Voltage: 24V
Voltage Type: DC
Tube Length: 747mm
Speed Code: Nominal 60m/min
Brushless DC Motor: Output on cable side shaft
Diameter: 48.6mm
Model Type: Power Moller
HOW TO SELECT A POWER MOLLER
Information needed:
1 - Material: What is in contact with the Motorized Roller?
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Metal
•
Plastic
•
Wood
•
Urethane
•
Natural rubber
•
Corrugated cardboard
•
Other material
2 - Product weight: What will be the maximum weight?
3 - Available voltage: What voltage are you using?
•
24VDC
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3f 230VAC @ 60Hz
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1f 115VAC @ 60Hz
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Other Voltages
4 - Desired transportation speed: How fast do you want to move the article?
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Feet/minute (FPM)
5 - Diameter of the roller: What diameter are you looking for?
Common Itoh Roller Diameters
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1.50” (38.0mm)
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1.68” (42.7mm)
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1.91” (48.6mm)
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2.25” (57.0mm)
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2.38” (60.5mm)
•
2.50” (63.5mm)
•
3.00” (76.3mm)
(Convert English units to Metric units, 1 inch=25.4 mm)
Itoh Denki USA, Inc
135 Stewart Road
Wilkes-Barre, PA 18706
www.itohdenki.com
Phone 888-310-8811
Specifications subject to change without notice
Selection
6 - Between frame dimension: What is your between frame dimension (BF)?
HOW TO SPECIFY THE LENGTH OF A POWER MOLLER:
In determining the correct length of the POWER MOLLER required, you should first obtain the
between frame width of the conveyor you will be mounting the POWER MOLLER in. If this
dimension is in inches, you should convert the dimension to millimeters, as all Moller tube lengths
are in metric units. From this dimension, subtract 15 millimeters for bearing end caps and
clearances to achieve the correct tube length. Subtract 21 mm when using “JQ” type shafts;
For the PM635FS the deduction will be 20366mm
mm, [14.41"]
PM763BS the deduction will be 30 mm, and for
Tube Length
the IP-G and HP-G rollers 35 mm.
5mm [0.20"]
Bearing End Cap
5mm [0.20"]
Bearing End Cap
2.5mm [0.10"]
Clearance
2.5mm [0.10"]
Clearance
381mm [15.00"]
Between Frame
Example: Between frame measures 15 inches. Converting to millimeters 15" X 25.4 mm / in. =
381 mm. Deducting 15 mm for bearing caps and clearances, 381mm - 15 mm = 366 mm. Tube
length will be 366 mm long. When in doubt, contact an Itoh representative to help you in selecting
the correct Power Moller for your application.
7 – Options: Does the application call for any special options?
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Lagging (Natural Rubber, NBR, Neoprene, Urethane)
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Dust-proof
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Waterproof
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Brake
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Clutch
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Other
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KF - Brackets not ordered with roller
Important Formulas:
Tangential Force (TF)
1 - Tangential force is the force in lbs. that is needed to move the item on the conveyor.
The force tangent to the roller’s surface.
Tangential force F can be found by the following formula:
Formula 1
TF = µ X W
TF = Required tangential force
W= Weight of article to be transferred
µ = Coefficient of rolling friction in accordance with the material composition
of the bottom of the article to be transferred. (See Table I)
2 - To determine the number of POWER MOLLER units required for transfer, compare
required tangential force (F) and the tangential force of one POWER MOLLER unit (f)
Formula 2
Number of POWERMOLLERS required = F/f
Itoh Denki USA, Inc
135 Stewart Road
Wilkes-Barre, PA 18706
www.itohdenki.com
Phone 888-310-8811
Specifications subject to change without notice
Selection
Table I - Coefficient of Rolling Friction (µ)
Tube Material
Steel
Urethane Lagging
Natural Rubber Lagging
Product Material
Natural
Corrugated
Rubber
Cardboard
Metal
Plastic
Wood
Urethane
0.01 - 0.03 0.02 - 0.04 0.02 - 0.05 0.02 - 0.05 0.03 - 0.05 0.07 - 0.11
0.02 - 0.05 0.02 - 0.05 0.02 - 0.05 0.02 - 0.05 0.03 - 0.05 0.07 - 0.11
0.03 - 0.05 0.03 - 0.05 0.03 - 0.05 0.03 - 0.05 0.03 - 0.05 0.07 - 0.11
The above values are based on industry standards of products with a smooth, uniform bottom surface in contact with the roller.
Example
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Material
Cardboard
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Weight
25 lbs.
3f 230VAC @ 60Hz
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Voltage
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Speed
85 FPM
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Diameter
2.25”
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BF
24”
•
Options
None
A - Tangential force required (Formula 1)
Given W = 25 lbs.
Cardboard coefficient m = 0.11
TF = m X W
TF = 0.11 X 25 lbs.
TF = 2.75 lbs. required to move the article
PM570AS-20 TF - 5.4 lbs. > 2.75 lbs. (See Performance Data, page 45)
B - Match/Best fit the diameter
•
Diameter given 2.25” (57.0 mm)
Model - PM 570
C - Given AC motor type
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Model number/motor type reflects AC or DC
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PM570AS
D - Select the best speed for the customer
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Speed code is an approximate meter-per-minute figure
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Varies by model
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Reference FPM values
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See speed table for PM570AS, page 45
•
Given 85 FPM, Speed code -20 offers 89.6 FPM
Model number with speed code - PM570AS- 20
E - Maximum Load Limit
–
See maximum static load limit table, page 60
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PM570 series
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500 – 600 mm tube length
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Maximum load limit of 176 lbs. per roller
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25 lbs. load < 176 lbs. limit – Okay
F - Select the correct voltage
PM570AS is an AC motor type
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Available voltage is 3f 230VAC @ 60Hz
Model number with voltage - PM570AS-20-595- 3-230
G - Options
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No options given
Final model number PM570AS-20-595-3-230
Description
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2.25” Diameter
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Standard AC motor type
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90.1 FPM
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595 mm Tube Length
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3f 230 VAC @ 60 Hz
•
No Options
Itoh Denki USA, Inc
135 Stewart Road
Wilkes-Barre, PA 18706
www.itohdenki.com
Phone 888-310-8811
Specifications subject to change without notice