A few steps to the optimal product

Key terms for wheels and castors

1. Select your product.

Wheels, swivel and fixed castors or press-on bands / tyres can be used depending on the application. Swivel castors can rotate, while fixed castors run in a fixed direction. The castors can be attached using a top plate, bolt hole, stem, expander or plug-in pin.

Product type

Produktart Bockrolle

Fixing


2. Determine the required load capacity.

The load capacity required for a wheel or castor is calculated by dividing the dead weight of the transport equipment and its additional weight by the number of supporting wheels or castors. The result is then multiplied by a safety factor dependent on the application conditions.

 

 

formula

T = required load capacity per wheel or castor
E = dead weight of the transport equipment
Z = maximum additional weight
n = number of supporting wheels or castors
S = safety factor

3. Starting, rolling and swivel resistance. Manouevrability.

The starting, running and swivel resistance of a wheel or castor is largely dependent on the tread, wheel bearing, wheel Ø, overall load and the condition of the surface. (See page 49 for more information)

The manouevrability of a transport equipment is dependent on the quantity and type of the castors which are used, as well as how they are arranged. These factors in turn affect load capacity, manouevrability, control, cornering and stability.
Low rolling resistance
• large wheel Ø
• hard tread
• high tread elasticity
• ball bearing
• hard, smooth surface

Low swivel resistance (swivel castors)
• hard tread
• crowned tread
• large offset
• hard, smooth surface

4. Corrosion resistance. Temperature resistance. Chemical resistance.

The service life and functionality of a wheel or castor depends to a certain extent on how well the materials used or their surface finish are capable of withstanding corrosion, temperature changes and chemical substances. Temperature and the duration of exposure are the most important factors.

5. Select from a wide range of tread materials.

Hardness, shape and tread material have a significant impact on the operational comfort, smooth rolling performance and starting, rolling and swivel resistance of a wheel or castor. The tread (tyre) of a wheel should normally be softer than the surface. Otherwise the wheel may press into the surface and damage it.
Tread material Tread and tyre hardness
Pneumatic tyre, soft rubber
Elastic solid rubber, super-elastic solid rubber
Solid rubber, TPE, polyurethane 75 Shore A, silicone rubber
TPU, polyurethane 92 Shore A
Steel, cast iron, nylon, polypropylene, phenolic resin
 

         soft

hard

Tread material Operating noise
Pneumatic tyre, soft rubber
Elastic solid rubber, super-elastic solid rubber
Solid rubber, TPE, polyurethane 75 Shore A, silicone rubber
TPU, polyurethane 92 Shore A
Steel, cast iron, nylon, polypropylene, phenolic resin
 

loud

quiet


6. Select a wheel bearing type.

Selecting a suitable bearing will depend on the speed, load, environmental factors and the force required to move the transport equipment.

Plain bores are simple, but have an unfavourable friction coefficient. However, they have the worst coefficient of friction, leading to a relatively high starting and rolling resistance.
Roller bearings are robust, have a low rolling resistance and a small radial bearing clearance.
Ball bearings have the best starting and rolling properties, the smallest bearing clearance, a high load capacity and are also suitable for high speeds.

Plain bore
Roller bearing
Ball bearing

7. Select a suitable bracket, version and options.

The suitable bracket for every application and all requirements. Pressed steel bracket in standard, stainless steel or heat-resistant version, welded steel heavy-duty bracket with or without suspension, or elegant synthetic bracket.

The functionality of wheels or castors can be enhanced by using different versions or options. Wheel and swivel head brakes to prevent swivel castors rolling and rotating, foot guard for avoiding foot injuries, electrically conductive treads for protection against electrostatic discharge and many more.
Lenkrolle mit Feststeller "stop-fix"
Lenkrolle mit Feststeller "ideal-stop"
Lenkrolle mit Feststeller "stop-top"
Lenkrolle mit Feststeller "central-stop"
Boclrolle mit Anschraubplatte und Trommelbremse
Lenkrolle mit Rückenloch und Fadenschutz
Lenkrolle mit Anschraubplatte und Fußschutz
Lenkrolle mit Richtungsfeststeller
Lenkrolle mit Radfeststeller "Radstop"
Wagenheber