Barden · 5

X-life ultra bearings

 X-life ultra bearings are a truly

revolutionary new bearing design

made from Cronidur 30, a patented

high-nitrogen steel originally developed

by FAG for critical aerospace

applications. X-life ultra bearings

offer remarkable performance

characteristics, longer life and are

100°¡  more corrosion resistant than

conventional stainless steels. X-life

ultra spindle bearings —  considered

the most advanced bearing available

on the market today in terms of load

capacity and speed —  are available

for use in a wide range of precision

machine tool applications in bore

diameters ranging from 20 –  120 mm.

X-life ultra bearings are designed

to meet the speed, accuracy and

reliability requirements of today’ s

high speed machining centers. X-life

ultra bearings can provide substantial

savings to both machine tool

manufacturers and end users.

X-life ultra bearings allow spindles

to run at extremely high speeds

under varying lubrication conditions.

X-life ultra bearings —  when

compared to conventional hybrid

bearings —  will run 30% faster. Also,

dynamic load ratings increase by a

factor of 2.20 and the permissible

contact pressure for infinite fatigue

life rises from 2,000 MPa to 2,500

MPa. Higher admissible contact

pressure also allows use of a smaller

bearing design which means a lower

velocity at unchanged speeds and a

corresponding reduction in lubricant

stress which results in a significant

increase in grease life. This combination

of characteristics produces

a bearing with a service life up to

10 times longer than today’ s hybrid

bearings! With grease lubrication

and attention paid to application

parameters, X-life ultra bearings

are able to operate at 1.5M dN.

Speeds of up to 3.0M dN can be

achieved with oil lubrication.