Legend of wheel symbols

A wheel is a circular object capable of rotating around a central axis.
The wheel is made up of the following elements:
1. nucleus
2. coating
3. hub
4. support

The wheels can be made of different materials both for the core and for the covering. They also differ from each other in size, type of sliding and load capacity.
For each individual need it is essential to identify the most suitable wheel, with any support.
In this choice it is necessary to take into consideration the type of use, the environment of use and the load it will have to bear.

THE SUPPORT
The support is a union element between the wheel and the trolley/machinery/equipment etc. Manually operated wheels are usually not driven but are only intended for towing or pushing operations with manual or mechanical means at reduced speed (max 4 km/h).

There are different types of support depending on the type of rotation and movement that allow:

Rotating supports
The rotating supports rotate around their vertical axis as the direction of travel changes. They can be with a plate, with a through hole, with a smooth pin or a threaded pin.
All these types of supports can have a built-in brake.

Fixed supports
It cannot rotate, it serves to keep the wheel along a guideline and is only available in the version with plate.

On the same trolley/machinery/equipment it is possible to use wheels with different supports to maximize performance.

Bushing hole
The bushing is the simplest, cheapest and most resistant type of sliding. Wheels with supports and through hole are normally used for trolleys moved at low speed and short distances. This type of sliding does not require particular maintenance except in some cases where the use of grease and oil is recommended. It is particularly resistant to corrosion and impacts.

Roller cage
The needle cage bearing is a strong sliding bearing with a small mounting space and does not require special maintenance.
It is the most used type of sliding for light-medium loads.
It consists of steel rollers caged in a steel or nylon structure. The rollers are lubricated at the time of assembly so they do not require further maintenance.

Ball bearing
The ball bearing is ideal for medium to heavy loads where ease of sliding is of primary importance. It is composed of steel spheres inserted in a cage that rotates between an external ring and an internal ring also made of steel. The balls are lubricated at the time of assembly and sealed for better waterproofness

For wheels with fixed and rotating supports there is a need to securely fasten the wheel to the trolley/equipment/machinery.

The fastening elements present in our wheels are the following:

Plate fixing

to screw, it is recommended for all machinery or flat surfaces. They are used for both light and high-capacity loads, usually for industrial applications.
It is necessary to pay particular attention to the dimensions of the plate, the fixing hole spacing as well as the diameter of the fixing holes.

Fixing with central hole

this type of fixing has a central hole to be screwed to the trolley.
You need to pay special attention to the diameter of the plate and the diameter of the center hole.

Fixing with threaded shank

the tang is screwed directly into the carriage and secured with a nut. Attention must be paid to the diameter of the threaded shank and the length of the shank.

Fixing with smooth shank

the tang is fixed directly into a pipe or hole. It is used in the case of wheels for light loads.
There is also a version with a clip tang: the tang is inserted into a special tube and fixed with a spring ring.
Wheels with this type of fixing are quickly assembled and are usually used for furniture wheels.
When choosing the fixing with tang, the diameter of the tang as well as the length of the latter must be considered.