Round O-ring Lenco Idler wheel (2.50 mm shaft)  

New idler wheel  Lenco with round O-ring and sintered bushings

 This model is identified by the presence of an e-clip that locks the wheel on its shaft. Please verify the correct model before purchase.

The new idler wheel comes with 4 o-rings in all, molded to our specifications:

1 o-ring made of rubber with the same featured as the original Lenco wheel

2 o-rings made of liquid silicone with increased section (this is the o-ring that comes preinstalled on the wheel)

1 o-ring made of liquid silicone with a reduced section.

This type of silicone enhances the grip capabilities of ordinary black rubber. It must be noted that the wheel transmits not only the rotation of the motor but also the vibrations generated by the motor itself, so selecting the right material is crucial. Silicone compared to rubber transmits a lot less motor vibrations.

Further key parameters are:

-        durability: silicone has a much longer life than rubber

-        greater resistance to ultraviolet rays

-        excellent resistance to temperature, which is a very important feature since the motor naturally tends to produce 

heat which is transmitted to the o-ring via the motor shaft/pulley

The Circular o-ring having a spherical shape has a minimal point of contact with the motor itself and the very slight eccentricity that can be had with the o-ring itself does not result in Wow&Flutter values that cause listening problems.

After many years of use, it is possible to replace the installed o-ring with a new one, without replacing the wheel.

Audiosilente has gone further...------

                                                                  Idler Wheel Material :

CNC machined from Avional aluminum,

The weight of the idler wheel is only 17 grams. 2 grams more than the original version. The weight is critical because Lenco designed a suspended idler wheel so the interaction between idler wheel weight and spring type determines the amount of noise produced by the idler wheel itself and the turntable. A heavier wheel requires a new, higher tension, spring to exert an even grip on the platter and this causes more noise and more vibrations.

The new idler wheel now mounts 4 sintered bushings, while the original Lenco wheel mounted only 2.

This idlerwheel is the only one on the market that adopts this type of bronze.

Sintered bushings are made by hot pressing a mixture of bronze powders into a mold. At the end of the process the bushings are pre-impregnated with turbine oil. When examined under a microscope they show a highly porous structure within which the oil is contained.

Sintered bronze bushings thus represent the best material for rotating objects as the they release oil that creates a film around the shaft enabling the smooth rotation of the wheel.

Another special feature of sintered bronze is its high durability compared to other types of bronze and materials.

With sintered bronze, there is no risk of seizure of moving parts.

This is why all turntables, from Lenco to Garrard, including Thorens, have always used only sintered bronze.