Prop shafts have been around for many years, and they have been helping to ensure efficient vehicular handling during most of that time. The phrase ‘drive’ or ‘prop’ shaft first appeared as long ago as the middle of the nineteenth century, but it wasn’t until the very end of that century when the term began to signify something that we would recognise as a prop shaft in a modern-day sense.
Of course, these earliest shafts were more akin to lengths that linked the moving components upon wooden carts, and it’s fair to say that the prop shaft has come a long way in the intervening years. However, prop shafts have actually changed a lot even in the last 3 decades or so, so improvements to these devices are hardly ancient history.
Advancing Technology
Modern developments in vehicle manufacture – such as complex gearboxes, high torque engines and extremely large vehicles (like trucks) – mean that prop shafts have needed to evolve to continue to be of use. In response to these more demanding requirements, several large adjustments have been made to prop shafts, of which the most significant two are the design of the flange and the introduction of the MIS assembly.
The Flange
Historically, the flange of a prop shaft has been present in all sorts of diverse sizes, but in more recent years an increasingly standardised pattern has been ushered in. This modern flange uses a ‘cross tooth’ design to centralise the prop shaft and also transmit very high torques through the shaft. More torque can be transferred because the bolts within the prop shaft itself are subjected to much less torque – thanks to innovative serrated teeth – so the improvement has been significant.
MIS
Large commercial vehicles are increasingly using what is known as an ‘MIS assembly’, as this change in prop shaft construction has reduced the number of separate components that needed to be in the centre bearing and slide assemblies. Whilst this might not sound like much, it has meant that a pair of complex assemblies have been amalgamated, which results in more robust prop shafts that can be manufactured more easily and efficiently.
No matter how old or young the prop shaft on your vehicle might be, the DriveLine team are ideally placed to carry out any prop shaft repairs that you need us to. We can replace damaged components within any prop shaft or supply you with an entirely new assembly as you require, so don’t hesitate to contact us by calling 01524 382262 or emailing info@propshaftrepairs.com to find out more.
