Ceramic Bearings Vs Stainless Steel

I recently tested some derailleur pulleys with plain sleeve bearings vs some stainless steel ball bearings and found that under typical conditions the steel ball beairngs in your derailleur consume about 60 mw at full speed that figure is for two.

Ceramic bearings vs stainless steel.

Stainless join date aug 2008 location californeeeah posts 1 529 post thanks like likes given 51 likes received 336. There are many other differences but for turbo applications that is the main draw. Full ceramic bearings where the inner and outer bearings are made of ceramic material as well as the balls are super nice too but those can get very expensive. Ceramic bearings vs steel bearings ceramic materials offer superior corrosion and heat resistance higher dimensional stability and lower density which facilitates high speed.

Stainless steel bearings win the prize for load and speed ratings. Cost of purchase for ceramic and steel bearings. This is mostly due to the additional time spent to perfect a quality ceramic ball. They also have a much higher operating temperature range than stainless which will anneal soften at a much lower temperature.

Rolling resistance is the key trump card promoted by ceramic bearing fans. They will both also cope with higher temperatures than chrome steel but ceramic bearings also win here. A set of fine quality ceramic bearings starts out at about 200 usd more than double what you would pay for comparable steel bearings. It takes weeks for a kogel ball to sit in a tumbler and be.

The maximum improvement is a potential 3. This spindle could be turning a flycutter with interrupted cuts. Ceramic bearings are more dimensionally stable at high temperature than stainless bearings. Because ceramic bearings are rounder with a smoother surface and more uniform size friction is reduced and that can contribute to a less energy required.

While regular bearings are made from stainless steel ceramic bearings are made from ceramic silicon nitride si2n4. As someone stated on the first page of this thread derailleur pulleys will make the largest dfference as their rotational speed is highest. In practice rolling friction cannot be eliminated so the likely figure is more like 10 of the 3 ie 0 3. Stainless steel bearings and full ceramic bearings are both corrosion resistant but the ceramic bearings have greater corrosion resistance.

If you opt for full ceramic bearings bearings with ceramic cases in addition to ceramic balls you re looking at about 800 per set. Or they call them ceramic hybrid bearings. Schaeffler s data is useful because it shows how small the potential gain by switching from steel to ceramic bearings is.