Monoblock Wheels VS 2/3 Piece Multi-Piece Wheels
Date: 2018-05-23 / views / From: Aully.com
The ultimate in one-piece wheels. Forging is the process of forcing a solid billet of aluminum between the forging dies under an extreme amount of pressure. This creates a finished product that is very dense, very strong and therefore be very light, in fact the lightest of all wheels! The costs of tooling, development, equipment, etc., make this type of wheel very exclusive and usually demand a high price in the aftermarket.
The block in this case is actually a round bar stock of high quality, aerospace-quality 6061-T6 Aluminum Alloy.
The round bar is pressed in a huge forging machine, to stamp out a wheel shaped blank. Forging is a hot working process, and helps to align the grain structure of the alloy. This results in a very strong, very lightweight wheel construction material.
The wheel blank is then flow-formed to create the outer barrel shape. Following that process, the wheel blank is loaded into a CNC milling machine and there the spoke pattern is milled out. Forged Wheels are built to order and custom tailored to your needs. Therefore, PCD, size, width, offset, color combination can all be specifically manufactured as per your needs. It is the lightest and strongest of all, can be made in perfect fitment!
A 2-piece wheel in this configuration pretty much looks like a Monoblock Wheel but with exposed Hardware (showing Bolts) If you do not want the bolts to be seen it is also possible to make them with non exposed hardware so the bolts will not be visible. So there is no lip!
Now the question is, why a 2 piece wheel? Mostly because with a 2 piece wheel in some applications you can run a more concave profile. On some applications, not on all applications. Its also easier to have 2 tone finishes.
The rim sections for 3 Piece Wheels are normally spun from disks of aluminum. Generally, spun rim sections offer the ability to custom-tailor wheels for special applications that would not be available otherwise, for example widebody applications. The rim sections are bolted to the center and normally a sealant is applied in or on the assembly area to seal the wheel.
This type of 3-piece construction was originally developed for racing in the early 1970s and has been used on cars ever since.
Three piece Forged Wheels are usually the most expensive wheel construction, mostly due to the assembly labor and components used. The wheels consist of three main pieces; the center, the outer barrel (lip), and the inner barrel. These three parts are held together with a series of perimeter bolts. Silicone RTV is used to seal between the two hoops.