SELECTION CRITERIA FOR WHEELS & CASTORS

 
 
 
1.
Load Carring Capacity - @ 50 % of standard capacity.
Load carring capacities given in charts are on the basis of ideal conditions like load is equally distributed on all wheels, trolley running on horizontal, smooth and leveled surface at a speed below 6 km / hr in ambient temperature @ 30o C.
However actually on shop floor many abnormal conditions exists like uneven loading on castors, shock loads on castors, unevenness of shop floor and trolley speed.
Considering above conditions as a thumb rule, load carring capacity of a castor is considered @ 50 % of standard stated capacity.
 
 
 
2.
Pushing / Pulling efforts
1.   Wheel Diameter - As diameter of wheel increases pushing / pulling efforts reduces.
2.   Wheel Material - As hardness of wheel increases pushing / pulling efforts reduces.
3.   Bearing Used - Pushing / Pulling efforts required for wheel with ball bearings are @ 50 % lesser than wheels with plain bore. About 70 % of industries are using wheels with ball bearings.
 
 
No Particulars Type of Wheel
UHMW PU-CI CI MS-TR
01 Load Capacity Better Better Excellent Excellent
02 Pushing / Pulling Efforts Low Medium Low Low
03 Wear Resistance Better Better Excellent Excellent
04 Shock Resistance Fair Excellent Nil Nil
05 Road Grip Fair Excellent Fair Fair
06 Chemical Resistance Excellent Better Poor Poor
07 Noise Level Medium Low High High
08 Floor Protection Better Excellent Bad Bad
09 Comparative Life ( Times ) 1 T 2 T 4 T 4 T
10 Hardness 75 D 95 A 175 BHN 175 BHN
11 Safe Working Temperature 70O C 70O C 250O C 250O C
 
Avoid
 
 
SELECT RIGHT WHEELS & CASTORS SUITABLE FOR YOUR APPLICATION