O Ring Chain Friction

Like the standard o ring chains it is also used in high performance motorcycles.

O ring chain friction. It uses x ring seal to keep lubricant usually grease in place. The x ring keeps dust dirt and mud out while retaining lubrication. In o ring type chains when the rubber o ring is pressed and riveted it changes shape and becomes flat from the sides hence seals the space efficiently but the pressed o ring with flat sides create friction which results into significant drag. A minor factor and should be ignored in design work other than for ultra high speeds the theory has been proposed and generally accepted that the increase of friction on standing is caused by the rubber.

The biggest thing that the x ring chain brings to the table is less friction and friction is something every o ring chain on. The non o ring types date back to the beginning of time and are still used extensively today. The d i d 520 vt2 narrow x ring chain is a high quality chain for desert or enduro riders or for the mxer who wants a long lasting chain that has half the power loss of a normal o ring chain and benefits from reduced maintenance over a non o ring. This drag can be felt while rolling the rear wheel in cold state however the drag vanishes after.

Non o ring o ring and x ring. O ring sizes have been standardized and range in size from an inside diameter of 0 029 in. And a cross section of 0 040 in. Installation dimensions vary with duty and application and the user may find it easy to consult manufacturers catalogs which are typically configured as shown in figure 10 20.

You either have an x z or o ring chain type and it s important to use that information when making a decision. Normally motorcycle chain lubes work best when applied to the chain they were created for. For example an x ring chain is designed to reduce the extra friction over an o ring chain by the shape of its cross section. Built for professionals d i d s top of the line racing chain can be found on the bikes of ricky brabec for rally josh strang for gncc and ken roczen for sx mx.

And a cross section of 0 210 or more in. There are three principal types of roller drive chains. The x ring chain is a specialized type of sealed roller chain used to transfer mechanical power. Stretch o ring joule effect compress o ring lower durometer of o ring coeffici ent of friction increase durometer refer to rotary seals.

Also your chain type makes a difference in which lubricant you should buy. To o rings with an inside diameter of 16 or more in. X rings have less contact area between the x ring and the link plates and rollers and because of this reduction in friction x rings also have a tendency to last longer than o rings. It has higher performance in terms of durability lifetime and power loss than non o ring chains as it has less friction than o ring chain while.