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Selection criteria for castors and wheels


This is where you will find all questions relating
 to bearings, castor load capacity, resistance to various environmental influences and the key
to our item numbers.

roll, castors and bearings

The bearing used is of utmost significance for both load capacity and rolling resistance. Thats why one can find that point marked as a main criteria on the proroll website.

On plane floors one can use hart and wear-resistant rolls or bandages. On the contrary, bumpy or sensitive floors in general are demanding for soft wheels – perhaps for pneumatic tyres.



bearings

plain bearings highly impact-proof bearings. Maintenance-free and corrosion-resistent, but simple constructed – usage on walking speed, maximal, recommended
cone ball bearings especially for apparatus castors, small starting- and rolling resistance, self-lubricating and maintenance-free

ball bearings impact-proof, maintenance-free bearings with small rolling resistances. No operation faster than walking speed recommended

precision ball bearings for heavy duty usage. Lowest starting-/rolling resistance, self-lubricating

load capacity

Use the following formula to calculate a load capacity for the roll required:

         own weight (device) + rated load, ensured
-------------------------------------------------------------------------    = required load capacity per single roll
                                             3                                                         (on condition of 4 rolls used in total)

Refering to ISO rules (DIN 8455) all carrying capacities stated on the proroll website are calculated following the terms of mean velocity of 4km/h running a plane ground. If you're expecting any operation under special settings, please consult us for recommending a perfect roll, castor or wheel meeting your needs.


Key to our item numbers

series /
example 		  housing specification
   251 		  wheel diameter
           100 		 

mounting specification
          70

 

wheel specification
    5

  wheel accessory
      FAD

for example: 251 100 70 5 FAD
 
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