What are the types of pulleys and how do they differ?

We have pulleys in 4 standard profiles - wedge, toothed, groove and flat, but we can also find atypical profiles and custom profiles. We stock most of the full hub pulleys and pulleys for Taper bush housings.

Different types of pulleys differ in shape, construction and the way they transmit power. Here are some key differences between V-belt, toothed, groove and flat pulleys:

1. V-belt pulleys:
   • They are wedge-shaped and are most commonly used with V-belts.
   • Ideal for applications where more power needs to be transmitted and where the V-belt can easily adapt to a V-belt.
   • Often used in industrial machinery and automotive transmission systems.
2. Toothed pulleys:
   • Have teeth on the outer circumference and are used with toothed belts.
   • They provide precise power transmission and are particularly suitable for applications where speed synchronization is required.
   • Often used in precision machinery, CNC equipment and automotive transmissions.
3. Groove pulleys:
   • Have grooves on their surface and are ideal for use with groove belts.
   • They provide stable and reliable power transmission and are slip resistant.
   • They are often used in conveyor systems, including conveyor belts and conveyors.
4. Flat pulleys:
   • They have a flat surface and are suitable for flat or slip belts.
   • They are used where power transmission is required without large deviations or changes in speed.
   • Often used in the textile industry, printing machines and similar applications.

Atypical and custom profiles allow an even more specific approach to your needs and ensure optimum force transmission in a variety of applications.


 

Hub types and their clamping:
 

Hub for TB bushing

The pulley has a tapered hole in the hub for a specific TB bushing number. Each bushing number is produced in multiple variations for different shaft diameters. When ordering a TB bushing, it is necessary to know its number (part of the TB pulley name) and the diameter of the shaft on which the bushing will be mounted. For example, the TB2012-25 bushing designation means bushing number 2012 and shaft diameter 25 mm.

When assembling, the bushing is inserted into the hub and the mounting bolts are loosely, by hand only, screwed into the hub. The assembly is seated on the shaft so that the pen fits easily into the groove. By tightening the screws, the sleeve is pressed into the hub and firmly seated on the shaft. TB bushings can be used on shafts without a keyway without the use of a locking feather, which reduces the maximum torque transmitted.

Mounting and dismounting the TaperBush (TB) :

Assembly:

1. Clean and degrease all contact surfaces and threads thoroughly before beginning assembly.
2. Lubricate the threads, insert the clamping sleeve into the pulley and place it in the correct position.
3. Lightly tighten the screws into the prepared tapped holes.
4. Fit the complete assembled component onto the shaft so that the locking tongue fits easily into the groove.
5. Tighten the bolts to the specified tightening torque.
6. After a short period of operation (0.5-1 hour), check the tightening.

Disassembly:

1. Unscrew the screws from the mounting holes and then screw them into the removal holes.
2. Release the pulley from the clamping sleeve by loosening the screws one by one.
3. Carefully remove the sleeve from the shaft.
   
   
    

Full hub

Clamping with tongue/groove system
The pulley has a full hub, which requires drilling a hole with the same diameter as the shaft. A groove is then formed for the tongue. Once prepared, the pulley is slipped onto the shaft and secured with the pen. Preparing the pulley with a full hub is more challenging than with TB bushing clamping, but has merit in structurally atypical or mini applications.

Clamping with clamping sleeve
When using a clamping sleeve, a locking pen is not used. A cylindrical hole is drilled in the hub with the same diameter as the clamping sleeve. The whole assembly is slid onto the shaft. After tightening the mounting screws, the pulley is securely mounted on the shaft.