Goods dimensioning
Goods contact surface
ENGINEERING MANUAL
17
The type of the goods to be transported over the 553 FlexTop belt must be checked carefully.
In general, there are a few recommendations need to be followed to check if the good can be transported:
• Bottom surface of the goods – relatively flat
• Center of gravity of the goods – relatively distributed (+/-20% around the nominal one)
• Weight – suitable with spheres – maximum 15N per sphere
• Contact – goods running on at least 6 spheres
To guarantee sliding properties, it is very important to calculate the sliding contact surface of the good.
It must be bigger than 38cm
2
.
For more support or particular applications you can contact our engineering department.
Possible solutions to meet the requirements:
• Increase the dimension of the box to achieve 76,8 cm
2
sliding surface (12 spheres x 6,4 cm
2
).
• Reduce the box weight to maximum 120N (8 spheres x 15N).
Contact with the spheres is a necessary condition
As a rule, there must be at least 6 spheres in contact with the good surface at the same time, so almost 6in
2
(38cm
2
) 1in
2
per sphere (6,4cm
2
per sphere).
Good suitability assessment of a polystyrene box weight 18kg
with bottom surface – external contact.
• External Length
• Internal Length
• External width
• Internal width
Calculation:
Surface in contact: (10x16) - (8x13) = 56cm
2
> 38cm
2
OK
This can be transformed in N° of spheres in contact 56/6,4=8,75 8 spheres (would result 8 full sphere in contact)
Weight: 18Kg * 9,81= 176,6N 176,6/15=11,77 minimun 12 spheres required
Output:
This type of goods can’t be transported.
10cm
8cm
16cm
13cm
Example:
Because of the weight, this
box cannot be transported.
You have two options to
solve the problem:
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