Updated: Feb 14
The newly released Method range of motors utilise an open bearing design as opposed to a shielded bearings. A tradition motor design has the bearings placed inside the bearing carrier ( stator ) one from the top one from the bottom, this leaves both bearings open to the environment.
To counter this motors bearings have a shield or seal to prevent dirt or particulates entering the bearing and shortening the its life. However this comes at a cost in the form of friction robbing torque and power (as well as increasing heat generated by the roller bearings riding on the lip and face of the shield). The Method range of motors do away with this by housing the bearings in a sealed chamber within the stator, thus allowing the bearing shields to be removed completely. This increases power and reduces friction induced heat (meaning response times and power production is crisper across the RPM range).
While removing the shields from the bearings used in the Method range of motors does reduce friction, heat generation and improve response times this also allows the motor to employ a wet sump. The wet sump is a sealed chamber within the stator. This chamber houses not only the bearings, but is also able to hold a small quantity of High speed bearing oil (RACE OIL X).
Using a specially designed shaft the method range of motors are able to supply the bearings with a constant cool clean supply of oil. This in turn draws away any heat within the high speed bearing as well as heat soak within the stator itself, while delivering this to the CNC aluminium base plate ( heat sink ) for dissipation.
The RACE OIL X range of oils are also formulated to improve the tolerance within the bearing itself, helping to remove minute vibrations and form a highly efficient and quiet running surface for the rotating parts to operate.
This effect goes far further than just a quiet smooth motor , the heat transfer from the bearings and stator (as well as the lack of heat generated by the removal of the bearings shields) but also increases the extended operational power numbers. In short the cooler a brushless motor runs, the longer it will deliver it's peak power numbers .