Drawn cup needle roller bearings bk

Drawn cup needle roller bearings consist of a very thin outer
ring and have as a peculiar characteristic a small dimension,
this enables an easy fitting up everywhere is required. HK and
BK are suitable for standing heavy loads and reaching very
high rotation speeds, they are forced into the housing bore
and do not have to be axially fixed.
Thanks to the cage, rollers are driven with maximum
precision.
Drawn cup needle roller bearings can be assembled without IR
inner ring therefore the shaft works as a raceway, in this case
the shaft must keep an hardness included between 64 HRC
and 58 HRC maximum load ability is assured.
Under request, HK and BK can be supplied with IR inner
ring. ISB needle roller bearings can be open ends or closed
end, and without lubricant, in fact they are fitted with a
conservative product before assembly.
BK needle roller bearings are closed at one end, they are used
for shaft-end mounting.
Drawn cup needle roller bearings are also available with seals:
this protects them from external factors and let them have
an higher lubricating power (temperature has to be included
within -30°C and +80°C).