How To Select A Power Moller Fittings ITOH DENKI Vietnam | ITOH DENKI Việt Nam
1 – Material: What is in contact with the Motorized Roller?
- 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
- 3 230VAC @ 60Hz
- 1 115VAC @ 60Hz
- Other Voltages
4 – Desired transportation speed: How fast do you want to move the article?
- Feet/minute (FPM)
5 – Diameter of the roller: What diameter are you looking for?
Common Itoh Roller Diameters
Common Itoh Roller Diameters
- 1.50” (38.0mm)
- 1.68” (42.7mm)
- 1.91” (48.6mm)
- 2.25” (57.0mm)
- 2.38” (60.5mm)
- 2.50” (63.5mm)
- 3.00” (76.3mm)
(Convert English units to Metric units, 1 inch=25.4 mm)
6 – Between frame dimension: What is your between frame dimension (BF)?
- In determining the correct length of the Power Moller required, you should first obtain the between the frame width of the conveyor you will be mounting the Power Moller in.
- All dimensions need to be converted to millimeters.
- Take the between the frame width and subtract 15mm to account for bearing end caps and clearances to achieve proper tube length.
- Subtract 21mm when using the “JQ” type shafts.
- For the PM635FS the deduction will be 20mm
- For PM763BS deduct 30mm
- For IP-G and HP-G rollers, deduct 35mm.
7 – Options: Does the application call for any special options?
- Lagging (Natural Rubber, NBR, Neoprene, Urethane)
- Dust-proof
- Waterproof
- Brake
- Clutch
- Other
- KF – Brackets not ordered with roller
Important Formulas:
Tangential Force (TF)
- 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)
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)
- 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
Number of POWERMOLLERS required = F/f
The above values are based on industry standards of products with a smooth, uniform bottom surface in contact with the roller.
Example
- Material: Cardboard
- Weight: 25 lbs.
- Voltage: 3Phase, 230VAC @ 60Hz
- Speed: 85 FPM
- Diameter: 2.25”
- BF: 24”
- Options: None
A – Tangential force required (Formula 1)
Given W = 25 lbs.
Cardboard coefficient = 0.11
TF = X W
TF = 0.11 X 25 lbs.
Cardboard coefficient = 0.11
TF = 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. ((Refer to catalog page for chosen roller to obtain performance data)
PM570AS-20 TF – 5.4 lbs. > 2.75 lbs. ((Refer to catalog page for chosen roller to obtain performance data)
B – Match/Best fit the diameter
- Diameter given 2.25” (57.0 mm)
- Model: PM570
C – Given AC motor type
- Model number/motor type reflects AC or DC
- PM570AS
D – Select the best speed for the customer
- Speed code is an approximate meter-per-minute figure
- Varies by model
- Reference FPM values
- See speed table for PM570AS, (Refer to catalog page for chosen roller to obtain speed codes)
- 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
- PM570 series
- 500 – 600 mm tube length
- Maximum load limit of 176 lbs. per roller
- 25 lbs. load < 176 lbs. limit – Okay
F – Select the correct voltage
PM570AS is an AC motor type
PM570AS is an AC motor type
- Available voltage is 3 phase, 230VAC @ 60Hz
- Model number with voltage – PM570AS-20-595-3-230
G – Options
- No options given
Final model number: PM570AS-20-595-3-230
Description
- 2.25” Diameter
- Standard AC motor type
- 90.1 FPM
- 595 mm Tube Length
- 3 230 VAC @ 60 Hz
- No Options
