How to Select Wheels & Castors

HOW TO SELECT CASTORS AND WHEELS
To identify the castor and wheel best suited to your needs, simply answer these six questions.

Question 1: Which category most closely matches the intended use?
  Some Typical uses Max Load kg/castor
Super Maintenance platforms and trolleys, cargo trolleys, mobile lifting equipment 2000-10,000
Extra Heavy Industrial   500-1400
Heavy Industrial Heavy duty trolleys, heavier mobile equipment, waste bins 250-1400
Industrial Heavy bakery trolleys, engine stands, heavy laundry trolleys, lighter trolleys used frequently or outdoors 110-700
Towing Equipment moved at speeds exceeding 5km/h 80-10,000
Medium Industrial Medium trolleys, bakery ovens racks, larger display stands, laundry trolleys, equipment racks 45-400
Institutional Hopital beds and furniture, office equipment, serving trolleys, computer equipment and displays stands 75-125

Question 2: What tyre material best suits your application?
  Shock Absorbency Capacity Push Effort Floor Protection Durability Typical Surfaces
Polyurethane Most surfaces
Grey Rubber Quality flooring, quiet / clean areas
Blue Rubber Quality flooring, small obstructions
Black Rubber Industrial areas, concrete
Lemcolite Abrasive, industrial floors
Pneumatic Outdoors, irregular or unsealed
Nylon Smooth Concrete
Cast Iron Oven floors, outdoors or unsealed, broken glass etc.

Excellent 
Good 
Fair 
Poor

Note: If chemical resistance is an important factor, check table on page 53 For more details see Page 23


Question 3: What Load must each castor carry?
Under ideal conditions the load is equally shared by all castors.
However for uneven floors use the actual number of castors less one for calculation purposes.

Example
Max Load: 420kg
Trolley: 105kg
Castors: 4
Max Load + Weight of Trolley
No of Castors -1
  Load Capacity = 420 +105
4 – 1
= 525
3
= 175kg
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Question 4: How big should the wheels be?
The Larger the wheel, the easier it rolls.
Diameter Usage Frequency Load Speed Distance Floor Condition
50mm Rarely

Often
Light

Heavy

Hand Operated

High Speed
Short

Low Towing
Smooth

Irregular large obstructions
75mm
100mm
125mm
150mm
200mm
250mm
300mm
400mm

Note:
In situations where equipment operating space is limited, for example where there is low overhead clearance the overall height and swivel radius of the castor will become important selection criteria.

Note: Wider wheels are harder to push but can carry heavier loads.


Question 5: To what will the castors be attached?
There are 2 general types of castor frame
Plate mounted Attaches directly to the underside of your trolley via a number of fixing bolts.
Available in both fixed and swivel castor types.
Bolt Hole Allow mounting with a single bolt or fitting to round or square tubing with optional pintles.
Note: The overall durability of the castor frame depends largely on its construction. See table on page 52
Note: For details on castor mounting arrangements see page 53

Question 6: Do the castors need brakes?
Brake Mechanisms can be added to most Lemcol Castors.
Type Code Description
Wheel Brake H Prevents the wheel rotating
Directional Lock K Allow a swivel castor to be fixed in a given direction
This lock does not stop the wheel rotating
Total Lock brake L Locks the wheel and the swivel mechanism for total security

Key to symbols
 
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