Blower

The 30% savings claim sounds more like sale lies than factual claims but I could not be sure without knowing details.

The big question is this. Does the current bearing system (when working properly) waste more than 30% of the electrical energy so that a change in bearing type could result in this kind of savings. It seems very unlikely.

It depends on what the baseline is for this claim. If one type of bearing imposed a 10% loss of motor energy, and a better bearing imposed a 7% loss; this would save 30% of the former loss, but only 3% of the motor energy.

If the original loss is 1%, improving to 0.7% would save only 0.3% of the motor energy.

Read those claims carefully.

The claim is probably based on the fact that the deep groove bearing theoretically has a point contact but when preloaded axially and along with the radial load certain parts of the ball and race slip against eachother and lose efficiency by producing heat and wear. A correctly designed deep groove bearing caters for this and will provide the desired life and efficiency.

A roller bearing theoretically has a line contact to carry the load and is defined for particular load. This bearing cannot take axial load so depending on the design it may be necessary to add a thrust bearing on each side which may negate the gain. However the advantage can only be evaluated if one considers the speed, loads i.e. radial and axial, life and GREASE used. Grease can sometimes produce more drag than losses in the deep groove bearing.

The designs for the bearings is slightly involved but not impossible for an engineer and are usually given in the bearing catalogues. If you do not want to involve yourself in the design (actually suitability of bearing analysis) as the present supplier of the machine to give you an evaluation or the bearing supplier to provide the data on the bearing and compare it with the data from the roller bearing supplier.

I would ask for load capacity, torque to turn at the load and speed in use, noise if you are interested and life.